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Engine Controls - Self-Diagnostics - 1.8l Turbo Audi A4 B5 рестайлинг

Testing & Diagnostics ~11397 words

DIAGNOSTIC TROUBLE CODE IDENTIFICATION

Note. Vehicle manufacturer does not support diagnostic information using aftermarket scan tools. Limited diagnostic information is available.

Generic Scan Tool CodeVAG 1551 CodeMalfunction/Affected Sensor Or Circuit
P0102 (1)(1) 16486MAF Circuit Low Input
P0103 (1)(1) 16487MAF Circuit High Input
P0107 (1)(1) 16491MAP Or Barometric Pressure Low Input
P0108 (1)(1) 16491MAP Or Barometric Pressure High Input
P0112 (1)(1) 16496Intake Air Temp Circuit Low Input
P0113 (1)(1) 16497Intake Air Temp Circuit High Input
P0116 (1)(1) 16500ECT Circuit Range/Performance Problem
P0117 (1)(1) 16501ECT Circuit Low Input
P0118 (1)(1) 16502ECT Circuit High Input
P0121 (1)(1) 16505TP Sensor Circuit Range/Performance Problem
P0122 (1)(1) 16506TP Sensor Circuit Low Input
P0123 (1)(1) 16507TP Sensor Circuit High Input
P0130 (1)(1) 16514HO2S Circuit Malfunction (Bank 1, Sensor 1)
P0131 (1)(1) 16515HO2S Circuit Low Voltage (Bank 1, Sensor 1)
P0132 (1)(1) 16516HO2S Circuit High Voltage (Bank 1, Sensor 1)
P0133 (2)(2) 16517HO2S Circuit Slow Response (Bank 1, Sensor 1)
P0134 (1)(1) 16518HO2S Circuit No Activity Detected (Bank 1, Sensor 1)
P0136 (1)(1) 16520HO2S Circuit Malfunction (Bank 1, Sensor 2)
P0137 (1)(1) 16521HO2S Circuit Low Voltage (Bank 1, Sensor 2)
P0138 (1)(1) 16522HO2S Circuit High Voltage (Bank 1, Sensor 2)
P0140 (1)(1) 16524HO2S Circuit No Activity Detected (Bank 1, Sensor 2)
P0300 (2)(2) 16684Random/Multiple Cylinder Misfire Detected
P0301 (2)(2) 16685Cylinder No. 1 Misfire Detected
P0302 (2)(2) 16686Cylinder No. 2 Misfire Detected
P0303 (2)(2) 16687Cylinder No. 3 Misfire Detected
P0304 (2)(2) 16688Cylinder No. 4 Misfire Detected
P0321 (1)(1) 16705Ignition/Distributor Engine Speed Input Circuit Range/Performance
P0322 (3)(3) 16706Ignition/Distributor Engine Speed Input Circuit No Signal
P0327 (3)(3) 16711Knock Sensor No. 1 Circuit Low Input
P0332 (3)(3) 16716Knock Sensor No. 2 Circuit Low Input
P0422 (1)(1) 16806Main Catalyst Efficiency Below Threshold (Bank 1)
P0441 (1)(1) 16825EVAP System Incorrect Purge Flow
P0442 (1)(1) 16826EVAP System Small Leak Detected
P0455 (1)(1) 16839EVAP System Gross Leak Detected
P0501 (1)(1) 16885Vehicle Speed Sensor Range/Performance
P0506 (1)(1) 16890Idle Control System RPM Lower Than Expected
P0507 (1)(1) 16891Idle Control System RPM Higher Than Expected
P0560 (1)(1) 16944System Voltage Malfunction
P0562 (1)(1) 16946System Voltage Low
P0563 (1)(1) 16947System Voltage High
P0601 (1)(1) 16895PCM Memory Check Sum Error
P0604 (1)(1) 16988PCM Random Access Memory (RAM) Error
P0707 (4)(4) 17091Transmission Range Sensor Circuit Low Input
P0708 (4)(4) 17092Transmission Range Sensor Circuit High Input
P1102 (1)(1) 17510HO2S Heater Circuit Short to B+ (Bank 1, Sensor 1)
P1105 (1)(1) 17513HO2S Heater Circuit Short to B+ (Bank 1, Sensor 2)
P1127 (1)(1) 17535Long Term Fuel Trim (Multiplicative) Too Rich (Bank 1)
P1128 (1)(1) 17536Long Term Fuel Trim (Multiplicative) Too Lean (Bank 1)
P1136 (1)(1) 17544Long Term Fuel Trim (Additive) Too Lean (Bank 1)
P1137 (1)(1) 17545Long Term Fuel Trim (Additive) Too Rich (Bank 1)
P1176 (1)(1) 17584HO2S Correction Behind Catalyst Limit Attained (Bank 1)
P1196 (1)(1) 17604HO2S Heater Electrical Malfunction (Bank 1, Sensor 1)
P1198 (1)(1) 17606HO2S Heater Electrical Malfunction (Bank 1, Sensor 2)
P1213 (3)(3) 17621Cylinder No. 1 Fuel Injector Circuit Short To B+
P1214 (3)(3) 17622Cylinder No. 2 Fuel Injector Circuit Short To B+
P1215 (3)(3) 17623Cylinder No. 3 Fuel Injector Circuit Short To B+
P1216 (3)(3) 17624Cylinder No. 4 Fuel Injector Circuit Short To B+
P1225 (3)(3) 17633Cylinder No. 1 Fuel Injector Circuit Short To Ground
P1226 (3)(3) 17634Cylinder No. 2 Fuel Injector Circuit Short To Ground
P1227 (3)(3) 17635Cylinder No. 3 Fuel Injector Circuit Short To Ground
P1228 (3)(3) 17636Cylinder No. 4 Fuel Injector Circuit Short To Ground
P1237 (3)(3) 17645Cylinder No. 1 Fuel Injector Open Circuit
P1238 (3)(3) 17646Cylinder No. 2 Fuel Injector Open Circuit
P1239 (3)(3) 17647Cylinder No. 3 Fuel Injector Open Circuit
P1240 (3)(3) 17648Cylinder No. 4 Fuel Injector Open Circuit
P1250 (4)(4) 17658Fuel Level Too Low
P1325 (4)(4) 17733Cylinder No. 1 Knock Control Limit Attained
P1326 (4)(4) 17734Cylinder No. 2 Knock Control Limit Attained
P1327 (4)(4) 17735Cylinder No. 3 Knock Control Limit Attained
P1328 (4)(4) 17736Cylinder No. 4 Knock Control Limit Attained
P1337 (1)(1) 17745Camshaft Position Sensor Short To Ground (Bank 1)
P1338 (1)(1) 17746Camshaft Position Sensor Open Circuit Or Short To B+ (Bank 1)
P1386 (4)(4) 17794PCM Knock Control Circuit Error
P1410 (1)(1) 17818Fuel Tank Ventilation Valve Circuit Short To B+
P1425 (1)(1) 17833Fuel Tank Ventilation Valve Short To Ground
P1426 (1)(1) 17834Fuel Tank Ventilation Valve Open
P1471 (1)(1) 17879EVAP Leak Detection Pump Short To B+
P1472 (1)(1) 17880EVAP Leak Detection Pump Short To Ground
P1473 (1)(1) 17881EVAP Leak Detection Pump Open Circuit
P1475 (1)(1) 17883EVAP Leak Detection Pump Malfunction/Signal Circuit Open
P1476 (1)(1) 17884EVAP Leak Detection Pump Malfunction/Insufficient Vacuum
P1477 (1)(1) 17885EVAP Leak Detection Pump Malfunction
P1500 (3)(3) 17908Fuel Pump Relay Circuit Electrical Malfunction
P1501 (3)(3) 17909Fuel Pump Relay Circuit Short To Ground
P1502 (3)(3) 17910Fuel Pump Relay Circuit Short To B+
P1505 (1)(1) 17913CTP Switch Does Not Close (Open Circuit)
P1506 (1)(1) 17914CTP Switch Does Not Open (Short To Ground)
P1543 (3)(3) 17951Throttle Actuation Potentiometer Signal Too Low
P1544 (3)(3) 17952Throttle Actuation Potentiometer Signal Too High
P1545 (1)(1) 17953Throttle Position Control Malfunction
P1546 (4)(4) 17954Boost Pressure Control Valve Short To B+
P1547 (4)(4) 17955Boost Pressure Control Valve Short To Ground
P1548 (4)(4) 17956Boost Pressure Control Valve Open
P1555 (4)(4) 17963Charge Pressure Upper Limit Exceeded
P1556 (4)(4) 17964Charge Pressure Negative Deviation
P1557 (4)(4) 17965Charge Pressure Positive Deviation
P1558 (1)(1) 17966Throttle Actuator Electrical Malfunction
P1559 (4)(4) 17967Idle Speed Control/Throttle Position Adaptation Malfunction
P1560 (4)(4) 17968Maximum Engine Speed Exceeded
P1602 (4)(4) 18010Power Supply (B+) Terminal 30 Low Voltage
P1606 (4)(4) 18014Rough Road Specification Engine Torque ABS-ECU Electrical Malfunction
P1611 (1)(1) 18019MIL Call-Up Circuit/TCM Short To Ground
P1612 (4)(4) 18020PCM Incorrect Coding
P1613 (5)(5) 18021MIL Call-Up Circuit Open Or Short To B+
P1624 (6)(6) 18032MIL Request Active
P1640 (1)(1) 18048Internal PCM (EEPROM) Error
(1) MIL is switched on after 2 trips. (2) MIL is switched on after 2 trips or will blink. (3) MIL is switched on immediately. (4) MIL is not switched on. (5) MIL is switched on after 2 trips. See appropriate ELECTRONICS CONTROLS article in TRANSMISSIONS. (6) MIL is switched on immediately. See ELECTRONICS CONTROLS article in TRANSMISSIONS.
(1)MIL is switched on after 2 trips.
(2)MIL is switched on after 2 trips or will blink.
(3)MIL is switched on immediately.
(4)MIL is not switched on.
(5)MIL is switched on after 2 trips. See appropriate ELECTRONICS CONTROLS article in TRANSMISSIONS.
(6)MIL is switched on immediately. See ELECTRONICS CONTROLS article in TRANSMISSIONS.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DIAGNOSTIC TESTS

Note. It is necessary to generate a PCM readiness code if PCM memory is cleared, battery voltage is disconnected or PCM is disconnected. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION article. If PCM was replaced, see PCM REPLACEMENT in SELF-DIAGNOSTICS - INTRODUCTION article.

Note. To properly diagnose vehicle, it is recommended to use VAG 1551 scan tool and VAG 1598/22 test box.

DTC P0102/16486 & P0103/16487: MAF CIRCUIT FAILURE

IMPORTANTManufacturer used different varients of MAF sensor. Early varients had a 4-pin connector and later varients had a 5-pin connector. The following test is for a 4-pin connector type. If equipped with a 5-pin connector, use testing for 2001 vehicle. See DTC P0101/16485: MASS AIRFLOW SENSOR IMPLAUSIBLE SIGNAL, DTC P0102/16486: MASS AIRFLOW SENSOR SIGNAL TOO SMALL &/OR DTC P0103/16487: MASS AIRFLOW SENSOR SIGNAL TOO LARGE .
  1. Inspect Mass Airflow (MAF) sensor connector for looseness and/or corrosion. Repair sensor connector as necessary. If sensor connector was okay, go to next step. If sensor connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. Check MAF sensor fuse. Replace if necessary. Turn off all electrical accessories. Engine coolant fan must not run during test. Turn ignition off. Disconnect MAF sensor connector.
  2. Turn ignition on. Using a DVOM, check voltage between MAF sensor connector terminals No. 1 and 3. Voltage should be 9-14.5 volts. If voltage is within specification, go to step 4 . If voltage is not within specification, go to next step.
  3. Repair open wiring between MAF sensor and PCM as necessary. See «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between MAF sensor connector terminal No. 2 and test box socket 12. Check resistance between MAF sensor connector terminal No. 4 and test box socket 13. Resistance should be a maximum of 1.5 ohms for each reading. If resistance is within specification, go to next step. If resistance is not within specification, repair open circuit between MAF sensor connector and PCM connector. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using DVOM, check resistance between MAF sensor connector terminal No. 4 and test box socket 12. DVOM reading should be infinity. If reading is infinity, go to next step. If reading is not infinity, repair short circuit between MAF sensor connector and PCM connector. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. Adjust DVOM to 20 VDC range. Using DVOM, check voltage between MAF sensor connector terminal No. 2 and ground. Check voltage between MAF sensor connector terminal No. 4 and ground. DVOM should indicate zero volts for both readings. If voltage is as specified, go to next step. If voltage is not as specified, repair short to voltage as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  7. Replace MAF sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0107/16491 & P0108/16492: MAP SENSOR CIRCUIT FAILURE

Note. MAP sensor influences boost pressure limit and fuel mixture at engine start-up.

  1. Inspect Manifold Absolute Pressure (MAP) sensor connector for looseness and/or corrosion. Repair sensor connector as necessary. If sensor connector was okay, go to next step. If sensor connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect MAP sensor connector. Turn ignition on. Using a DVOM, check voltage between MAP sensor connector terminals No. 1 and 3, and terminals No. 2 and 3. Voltage should be 4.5-5.5 volts for each reading. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between MAP sensor connector terminals and specified test box sockets. MAP sensor connector terminal No. 1 and test box socket 61. MAP sensor connector terminal No. 2 and test box socket 62. MAP sensor connector terminal No. 3 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between MAP sensor connector terminals and specified test box sockets. MAP sensor connector terminal No. 2 and test box socket 61. MAP sensor connector terminal No. 3 and test box socket 61. MAP sensor connector terminal No. 3 and test box socket 62. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Replace MAP sensor. Clear DTCs and generate a PCM readiness code. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. After replacing MAP sensor, if MAP sensor signal is still implausible, replace PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0112/16496 & P0113/16497: IAT SENSOR CIRCUIT FAILURE

  1. Inspect Intake Air Temperature (IAT) sensor connector for looseness and/or corrosion. Repair sensor connector as necessary. If sensor connector was okay, go to next step. If sensor connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect IAT sensor 2-pin connector. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between IAT sensor connector terminals and specified test box sockets. IAT sensor connector terminal No. 1 and test box socket 54. IAT sensor connector terminal No. 2 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Using DVOM, check resistance between specified terminals. IAT sensor connector terminal No. 1 and ground. IAT sensor connector terminal No. 1 and test box socket 67. IAT sensor connector terminal No. 2 and ground. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check voltage between IAT sensor 2-pin harness connector terminal No. 1 and ground, then terminal No. 2 and ground. Voltage should be zero volts. If voltage is as specified, go to next step. If voltage is not as specified, repair wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, check resistance between IAT sensor terminals. Resistance should be 1.6-2.8 k/ohms. If resistance is as specified, go to next step. If resistance is not as specified, replace IAT sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. NOTE: If testing to this point has not identified a problem, failure is most likely an intermittent failure of IAT sensor.
  6. Using VAG 1551, monitor IAT sensor output. When IAT sensor reads approximately ambient temperature, remove IAT sensor from engine without disconnecting IAT sensor connector.
  7. Using VAG 1551, monitor IAT sensor output. Cool IAT sensor using a commercially available chilling spray. Observe IAT sensor output. If temperature value decreases, IAT sensor is okay. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If IAT sensor value does not decrease, replace IAT sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0116/16500, P0117/16501 & P0118/16502: ECT SENSOR CIRCUIT FAILURE

  1. Inspect Engine Coolant Temperature (ECT) sensor connector for looseness and/or corrosion. Repair sensor connector as necessary. If sensor connector was okay, go to next step. If sensor connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect ECT sensor 4-pin connector. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between ECT sensor connector terminals and specified test box sockets. ECT sensor connector terminal No. 1 and test box socket 53. ECT sensor connector terminal No. 3 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Using DVOM, check resistance between specified terminals. ECT sensor connector terminal No. 1 and ground. ECT sensor connector terminal No. 1 and test box socket 67. ECT sensor connector terminals No. 1 and 3. ECT sensor connector terminal No. 3 and ground. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check voltage between ECT sensor 4-pin harness connector terminal No. 1 and ground, then terminal No. 3 and ground. Voltage should be zero volts. If voltage is as specified, go to next step. If voltage is not as specified, repair wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, check resistance between ECT sensor terminals No. 1 and 3. See ECT SENSOR RESISTANCE table. If resistance is to specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not to specification, replace ECT sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
TemperatureOhms
86°F (30°C)1500-2000
176°F (80°C)275-375

ECT SENSOR RESISTANCE

DTC P0121/16505, P0122/16506 & P0123/16507: TP SENSOR CIRCUIT FAILURE

  1. Inspect Throttle Valve Control Module (TVCM) 8-pin connector for looseness and/or corrosion. Repair connector as necessary. If connector was okay, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect TVCM 8-pin connector. Turn ignition on. Using DVOM, check resistance between specified terminals. TVCM connector terminals No. 3 and 7. TVCM connector terminals No. 4 and 7. Voltage should be 9-14.5 volts for first measurement. Voltage should be 4-6 volts for second measurement. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 3 and test box socket 69. TVCM connector terminal No. 4 and test box socket 62. TVCM connector terminal No. 7 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 7 and test box socket 69. TVCM connector terminal No. 7 and test box socket 62. TVCM connector terminal No. 4 and test box socket 67. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0130/16514, P0131/16515 & P0132/16516: HO2S CIRCUIT FAILURE (BANK 1, SENSOR 1)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located before 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Start engine. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 3 and 4. Voltage should be .4-.5 volts. Turn ignition off. If voltage is within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 25. HO2S connector terminal No. 4 and test box socket 26. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between HO2S connector (harness side) terminal and specified test box socket. HO2S connector terminal No. 4 and test box socket 25. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 2. HO2S connector terminal No. 4 and test box socket 2. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair wiring harness short to wiring harness shielding as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0133/16517: HO2S SLOW RESPONSE (BANK 1, SENSOR 1)

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check aging of HO2S (response time). Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P0134/16518: HO2S NO ACTIVITY DETECTED (BANK 1, SENSOR 1)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located before 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Start engine. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 3 and 4. Voltage should be .4-.5 volts. Turn ignition off. If voltage is within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 25. HO2S connector terminal No. 4 and test box socket 26. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between HO2S connector (harness side) terminal and specified test box socket. HO2S connector terminal No. 4 and test box socket 25. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 2. HO2S connector terminal No. 4 and test box socket 2. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair wiring harness short to wiring harness shielding as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0136/16520, P0137/16521, P0138/16522 & P0140/16524: HO2S CIRCUIT FAILURE (BANK 1, SENSOR 2)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located behind 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect HO2S connector. Start engine. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 3 and 4. Voltage should be .4-.5 volts. Turn ignition off. If voltage is within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 51. HO2S connector terminal No. 4 and test box socket 52. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 4 and test box socket 51. HO2S connector terminal No. 3 and test box socket 2. HO2S connector terminal No. 4 and test box socket 2. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0300/16684, P0301/16685, P0302/16686, P0303/16687 & P0304/16688: CYLINDER MISFIRE DETECTED

Note. These DTCs can be set if fuel level is too low. DTC P1250 may also set when less than 2 gallons of fuel are remaining in tank.

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check misfire detection, fuel injectors and fuel evaporative system. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P0321/16705 & P0322/16706: IGN/DIST. CIRCUIT FAILURE

  1. Inspect engine speed sensor 3-pin connector for looseness and/or corrosion. Engine speed sensor is located at left rear of engine. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect engine speed sensor 3-pin connector. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between engine speed sensor connector (harness side) terminals and specified test box sockets. Engine speed sensor connector terminal No. 1 and test box socket 56. Engine speed sensor connector terminal No. 2 and test box socket 63. Engine speed sensor connector terminal No. 3 and test box socket 2. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Using DVOM, check resistance between engine speed sensor connector (harness side) terminals and specified test box sockets. Engine speed sensor connector terminal No. 1 and test box socket 2. Engine speed sensor connector terminal No. 1 and test box socket 63. Engine speed sensor connector terminal No. 2 and test box socket 56. Resistance should be infinity. If resistance is infinity, replace faulty engine speed sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

Knock Sensor No. 1

  1. Inspect knock sensor 3-pin connector for looseness and/or corrosion. Knock sensor No. 1 is located at left side of engine, under intake manifold near front of engine. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect engine speed sensor 3-pin connector. Using DVOM, check resistance between specified knock sensor 3-pin connector (sensor side) terminals. Knock sensor terminals No. 1 and 2. Knock sensor terminals No. 1 and 3. Knock sensor terminals No. 2 and 3. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, replace knock sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between knock sensor connector (harness side) terminals and specified test box sockets. Knock sensor connector terminal No. 1 and test box socket 68. Knock sensor connector terminal No. 2 and test box socket 67. Knock sensor connector terminal No. 3 and test box socket 2. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between knock sensor connector (harness side) terminals and specified test box sockets. Knock sensor connector terminal No. 2 and test box socket 68. Knock sensor connector terminal No. 3 and test box socket 68. Knock sensor connector terminal No. 3 and test box socket 67. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Loosen knock sensor No. 1 and re-tighten to 15 ft. lbs. (20 N.m). Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If DTC is still in memory, replace faulty knock sensor No. 1. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

Knock Sensor No. 2

  1. Inspect knock sensor 3-pin connector for looseness and/or corrosion. Knock sensor No. 2 is located at left side of engine, under intake manifold near rear of engine. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect engine speed sensor 3-pin connector. Using DVOM, check resistance between specified knock sensor 3-pin connector (sensor side) terminals. Knock sensor terminals No. 1 and 2. Knock sensor terminals No. 1 and 3. Knock sensor terminals No. 2 and 3. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, replace knock sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between knock sensor connector (harness side) terminals and specified test box sockets. Knock sensor connector terminal No. 1 and test box socket 60. Knock sensor connector terminal No. 2 and test box socket 67. Knock sensor connector terminal No. 3 and test box socket 2. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between knock sensor connector (harness side) terminals and specified test box sockets. Knock sensor connector terminal No. 2 and test box socket 60. Knock sensor connector terminal No. 3 and test box socket 60. Knock sensor connector terminal No. 3 and test box socket 67. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Loosen knock sensor No. 2 and re-tighten to 15 ft. lbs. (20 N.m). Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If DTC is still in memory, replace faulty knock sensor No. 2. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0422/16806: MAIN CATALYST FAILURE (BANK 1)

No test procedure is required for this fault code. Replace right Three-Way Catalytic (TWC) converter.

DTC P0441/16825: EVAP SYSTEM FAILURE

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check evaporative system. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P0442/16826 & P0455/16839: EVAP SYSTEM FAILURE

  1. Disconnect 3-pin EVAP Leak Detection Pump (LDP) connector. LDP connector is located behind left rear wheel housing liner. Using a DVOM, measure resistance between LDP connector (component side) terminals No. 1 and 3. Resistance should be 640-720 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace LDP. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Using a DVOM, measure resistance between LDP connector (component side) terminals No. 2 and 3. Resistance should be 17.5-27.5 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace LDP. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Connect VAG 1527B LED voltage tester between LDP connector (harness side) terminal No. 3 and ground. Start engine and idle. LED voltage tester should illuminate. If LED voltage tester illuminates, system is functioning properly. Test is complete. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. If LED voltage tester does not illuminate, check fuse for LDP. Inspect wiring between LPD connector (harness side) terminal No. 3 and fuse for an open circuit. Check fuel pump relay operation. See «SYSTEM & COMPONENT TESTING»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-system-component-testing) article. Repair as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0501/16885: VEHICLE SPEED SENSOR FAILURE

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check vehicle speed sensor signal. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P0506/16890 & P0507/16891: IDLE CONTROL SYSTEM FAILURE

  1. Inspect Throttle Valve Control Module (TVCM) 8-pin connector for looseness and/or corrosion. Repair connector as necessary. If connector was okay, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect TVCM 8-pin connector. Turn ignition on. Using DVOM, check resistance between specified terminals. TVCM connector terminals No. 3 and 7. TVCM connector terminals No. 4 and 7. Voltage should be 9-14.5 volts for first measurement. Voltage should be 4-6 volts for second measurement. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 3 and test box socket 69. TVCM connector terminal No. 4 and test box socket 62. TVCM connector terminal No. 7 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 7 and test box socket 69. TVCM connector terminal No. 7 and test box socket 62. TVCM connector terminal No. 4 and test box socket 67. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0560/16944, P0562/16946 & P0563/16947: SYSTEM VOLTAGE FAILURE

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check voltage between test box sockets No. 2 and 3, then 1 and 3.
  2. Voltage should be 10-14.5 volts for each reading. If voltage is within specification, go to next step. If voltage is not within specification, repair wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P0601/16985 & P0604/16988: PCM FAILURE

Replace PCM. See PCM REPLACEMENT in SELF-DIAGNOSTICS - INTRODUCTION article.

DTC P1102/17510: HO2S HEATING CIRCUIT SHORT TO B+ (BANK 1, SENSOR 1)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located before 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Check HO2S heater fuse. Replace if necessary. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Using a DVOM, check resistance between HO2S connector (sensor side) terminals No. 1 and 2. Resistance should be 0-19.9 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition on. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 1 and 2. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check voltage between HO2S connector (harness side) terminal No. 1 and ground. Voltage should be 11-14.5 volts. If voltage is within specification, go to next step. If voltage is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, connect leads between HO2S connector (harness side) terminal No. 2 and battery positive terminal. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 2 and test box socket 27. Resistance should be 1.5 ohms or less. If resistance is within specification, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1105/17513: HO2S HEATING CIRCUIT SHORT TO B+ (BANK 1, SENSOR 2)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located behind 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Check HO2S heater fuse. Replace if necessary. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Using a DVOM, check resistance between HO2S connector (sensor side) terminals No. 1 and 2. Resistance should be 0-19.9 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition on. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 1 and 2. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check voltage between HO2S connector (harness side) terminal No. 1 and ground. Voltage should be 11-14.5 volts. If voltage is within specification, go to next step. If voltage is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, connect leads between HO2S connector (harness side) terminal No. 2 and battery positive terminal. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 2 and test box socket 28. Resistance should be 1.5 ohms or less. If resistance is within specification, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1127/17535: LONG TERM FUEL TRIM MULTIPLICATIVE SYSTEM TOO RICH (BANK 1)

Note. Multiplicative applies to entire engine RPM and load range.

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check MAF sensor, HO2S control, HO2S located behind 3-way catalytic converter, fuel pressure regulator, residual fuel pressure and fuel injectors. Additionally, Output Diagnostic Test Mode (DTM) is also performed using VAG 1551. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1128/17536: LONG TERM FUEL TRIM MULTIPLICATIVE SYSTEM TOO LEAN (BANK 1)

Note. Multiplicative applies to entire engine RPM and load range.

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check HO2S located in front of 3-way catalytic converter, HO2S control, HO2S located behind 3-way catalytic converter, fuel pressure regulator, residual fuel pressure and fuel injectors. Additionally, Output Diagnostic Test Mode (DTM) is also performed using VAG 1551. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1136/17544: LONG TERM FUEL TRIM ADDITIVE SYSTEM TOO LEAN (BANK 1)

Note. Additive applies to engine running at idle speed.

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check intake air system for leaks, HO2S located in front of 3-way catalytic converter, MAF sensor, fuel pressure regulator, residual fuel pressure and fuel injectors. Additionally, Output Diagnostic Test Mode (DTM) is also performed using VAG 1551. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1137/17545: LONG TERM FUEL TRIM ADDITIVE SYSTEM TOO RICH (BANK 1)

Note. Additive applies to engine running at idle speed.

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located before 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Start engine. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 3 and 4. Voltage should be .4-.5 volts. Turn ignition off. If voltage is within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 25. HO2S connector terminal No. 4 and test box socket 26. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between HO2S connector (harness side) terminal and specified test box socket. HO2S connector terminal No. 4 and test box socket 25. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair wiring harness short as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 3 and test box socket 2. HO2S connector terminal No. 4 and test box socket 2. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair wiring harness short to wiring harness shielding as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. Check fuel pressure and residual fuel pressure. See «FUEL PRESSURE SPECIFICATIONS»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-18l-turbo) table. If fuel pressure is within specification, go to next step. If fuel pressure is not within specification, repair fuel system as necessary. If fuel system residual pressure is to low, verify no fuel line leaks are present. Replace faulty fuel pressure regulator or leaking fuel injectors. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. FUEL PRESSURE SPECIFICATIONS Function Specification System Pressure With Engine Idling (1) 50 psi (3.5 bar) With Engine Idling (2) 58 (4 bar) Residual Pressure (3) 36 psi (2.5 bar) (1) With fuel pressure regulator vacuum hose connected. (2) With fuel pressure regulator vacuum hose disconnected. (3) After 10 minutes.
  7. Inspect exhaust system for leaks. Repair as necessary. If exhaust system was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If exhaust system was not repaired, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1176/17584: HO2S CORRECTION BEHIND CATALYST LIMIT ATTAINED (BANK 1)

Note. VAG 1551 is necessary to diagnose this code.

  1. Inspect intake air system for leaks. Repair as necessary. If intake air system is not leaking, go to next step. If intake air system was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. VAG 1551 is necessary to continue diagnosing this code. VAG 1551 is used to check aging of HO2S (response time), HO2S heater and HO2S located before 3-way catalytic converter. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1196/17604: HO2S HEATER CIRCUIT ELECTRICAL FAILURE (BANK 1, SENSOR 1)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located before 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Check HO2S heater fuse. Replace if necessary. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Using a DVOM, check resistance between HO2S connector (sensor side) terminals No. 1 and 2. Resistance should be 0-19.9 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition on. Using a DVOM, check voltage between HO2S connector (harness side) terminals No. 1 and 2. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check voltage between HO2S connector (harness side) terminal No. 1 and ground. Voltage should be 11-14.5 volts. If voltage is within specification, go to next step. If voltage is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, connect leads between HO2S connector (harness side) terminal No. 2 and battery positive terminal. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 2 and test box socket 27. Resistance should be 1.5 ohms or less. If resistance is within specification, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1198/17606: HO2S HEATER CIRCUIT ELECTRICAL FAILURE (BANK 1, SENSOR 2)

  1. Inspect Heated Oxygen Sensor (HO2S) connector for looseness and/or corrosion. HO2S is located behind 3-way catalytic converter. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Check HO2S heater fuse. Replace if necessary. Ensure engine coolant temperature is at least 176°F (80°C). Turn ignition off. Disconnect HO2S connector. Using a DVOM, check resistance between HO2S connector (sensor side) terminals No. 1 and 2. Resistance should be 0-19.9 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace HO2S. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition on. Using a DVOM, check voltage between HO2S connector (sensor side) terminals No. 1 and 2. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check voltage between HO2S connector (sensor side) terminal No. 1 and ground. Voltage should be 11-14.5 volts. If voltage is within specification, go to next step. If voltage is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, connect leads between HO2S connector (sensor side) terminal No. 2 and battery positive terminal. Voltage should be 11-14.5 volts or voltage may be switching 0-12 volts. Either voltage reading is acceptable. If voltage is not within specification, go to next step. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between HO2S connector (harness side) terminals and specified test box sockets. HO2S connector terminal No. 2 and test box socket 28. Resistance should be 1.5 ohms or less. If resistance is within specification, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1213-16/17621-24: CYLINDER NO. 1-4 FUEL INJECTOR CIRCUIT SHORT TO B+

Note. Before performing test procedure, ensure fuse for fuel injectors is okay. Check engine speed sensor. Check fuel pump relay.

  1. Disconnect No. 1 fuel injector electrical connector. Connect a noid light to No. 1 fuel injector electrical connector (harness side). Disconnect No. 2, 3 and 4 fuel injector electrical connectors. Briefly crank engine starter and observe noid light. Noid light should flicker. Repeat test for fuel injectors No. 2, 3 and 4.
  2. If noid light flickers, go to next step. If noid light does not flicker, turn ignition off. Connect VAG 1598/22 test box to PCM harness connector. Using a DVOM, measure resistance between the following terminals: Fuel injector No. 1 harness connector terminal No. 2 and test box socket 73. Fuel injector No. 2 harness connector terminal No. 2 and test box socket 80. Fuel injector No. 3 harness connector terminal No. 2 and test box socket 58. Fuel injector No. 4 harness connector terminal No. 2 and test box socket 65. Resistance specification is 1.5 ohms or less. If resistance is not 1.5 ohms or less, go to next step.
  3. Using a DVOM, check wiring for an open between suspect fuel injector connector terminal No. 1 and relay panel. Maximum allowable resistance is 15 ohms. See WIRING DIAGRAMS article. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check resistance between suspect fuel injector harness connector terminals. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, check resistance between fuel injector terminals. Resistance should be 11-13 ohms. If fuel injectors are at operating temperature, resistance will increase 4-6 ohms. If resistance is not within specification, replace fuel injector. If resistance is within specification, check if PCM is triggering circuit. This requires VAG 1551 scan tool. Follow manufacturer's instructions.

DTC P1225-28/17633-36: CYLINDER NO. 1-4 FUEL INJECTOR CIRCUIT SHORT TO GROUND

Note. Before performing test procedure, ensure fuse for fuel injectors is okay. Check engine speed sensor. Check fuel pump relay.

  1. Disconnect No. 1 fuel injector electrical connector. Connect a noid light to No. 1 fuel injector electrical connector (harness side). Disconnect No. 2, 3 and 4 fuel injector electrical connectors. Briefly crank engine starter and observe noid light. Noid light should flicker. Repeat test for fuel injectors No. 2, 3 and 4.
  2. If noid light flickers, go to next step. If noid light does not flicker, turn ignition off. Connect VAG 1598/22 test box to PCM harness connector. Using a DVOM, measure resistance between the following terminals: Fuel injector No. 1 harness connector terminal No. 2 and test box socket 73. Fuel injector No. 2 harness connector terminal No. 2 and test box socket 80. Fuel injector No. 3 harness connector terminal No. 2 and test box socket 58. Fuel injector No. 4 harness connector terminal No. 2 and test box socket 65. Resistance specification is 1.5 ohms or less. If resistance is not 1.5 ohms or less, go to next step.
  3. Using a DVOM, check wiring for an open between suspect fuel injector connector terminal No. 1 and relay panel. Maximum allowable resistance is 15 ohms. See WIRING DIAGRAMS article. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check resistance between suspect fuel injector harness connector terminals. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, check resistance between fuel injector terminals. Resistance should be 11-13 ohms. If fuel injectors are at operating temperature, resistance will increase 4-6 ohms. If resistance is not within specification, replace fuel injector. If resistance is within specification, check if PCM is triggering circuit. This requires VAG 1551 scan tool. Follow manufacturer's instructions.

DTC P1237-40/17645-48: CYLINDER NO. 1-4 FUEL INJECTOR OPEN CIRCUIT

Note. Before performing test procedure, ensure fuse for fuel injectors is okay. Check engine speed sensor. Check fuel pump relay.

  1. Disconnect No. 1 fuel injector electrical connector. Connect a noid light to No. 1 fuel injector electrical connector (harness side). Disconnect No. 2, 3 and 4 fuel injector electrical connectors. Briefly crank engine starter and observe noid light. Noid light should flicker. Repeat test for fuel injectors No. 2, 3 and 4.
  2. If noid light flickers, go to next step. If noid light does not flicker, turn ignition off. Connect VAG 1598/22 test box to PCM harness connector. Using a DVOM, measure resistance between the following terminals: Fuel injector No. 1 harness connector terminal No. 2 and test box socket 73. Fuel injector No. 2 harness connector terminal No. 2 and test box socket 80. Fuel injector No. 3 harness connector terminal No. 2 and test box socket 58. Fuel injector No. 4 harness connector terminal No. 2 and test box socket 65. Resistance specification is 1.5 ohms or less. If resistance is not 1.5 ohms or less, go to next step.
  3. Using a DVOM, check wiring for an open between suspect fuel injector connector terminal No. 1 and relay panel. Maximum allowable resistance is 15 ohms. See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. If resistance is within specification, go to next step. If resistance is not within specification, repair wiring harness open as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, check resistance between suspect fuel injector harness connector terminals. Resistance should be infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, check resistance between fuel injector terminals. Resistance should be 11-13 ohms. If fuel injectors are at operating temperature, resistance will increase 4-6 ohms. If resistance is not within specification, replace fuel injector. If resistance is within specification, check if PCM is triggering circuit. This requires VAG 1551 scan tool. Follow manufacturer's instructions.

DTC P1250/17658: FUEL LEVEL TOO LOW

Note. For malfunctions which may be caused by a low fuel volume (i.e., combustion misfire) a low fuel DTC P1250 is also stored when less than 2 gallons of fuel is remaining.

Check wiring between instrument cluster and Powertrain Control Module (PCM). Check signal from fuel gauge and check fuel gauge. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. Erase DTC memory. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION article.

  1. Inspect knock sensor No. 1 connector for looseness and/or corrosion. Knock sensor No. 1 is located on driver side of engine under intake manifold closer to front of engine. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If sensor connector was repaired, erase DTC memory and test drive vehicle. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Using a DVOM, measure resistance between the following knock sensor connector (sensor side) terminals: Knock sensor terminals No. 1 and 3. Knock sensor terminals No. 1 and 3. Knock sensor terminals No. 2 and 3. Resistance specification is infinity (no continuity). If resistance is infinity, go to next step. If resistance is not infinity, replace knock sensor No. 1. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition off. Connect VAG 1598/22 test box to PCM harness connector. Using a DVOM, measure resistance between knock sensor connector (harness side) and the following terminals: Knock sensor connector (harness side) terminal No. 1 and test box socket 68. Knock sensor connector (harness side) terminal No. 2 and test box socket 67. Knock sensor connector (harness side) terminal No. 3 and test box socket 2. Resistance specification is 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open in wiring harness as necessary. See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, measure resistance between knock sensor connector (harness side) and the following terminals: Knock sensor connector (harness side) terminal No. 2 and test box socket 68. Knock sensor connector (harness side) terminal No. 3 and test box socket 68. Knock sensor connector (harness side) terminal No. 3 and test box socket 67. Resistance specification is infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness as necessary. See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Loosen knock sensor No. 1 mounting bolt and retighten to 15 ft. lbs. (20 N.m). If DTC still exists, replace knock sensor No. 1. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If DTC no longer is stored, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  1. Inspect knock sensor No. 2 connector for looseness and/or corrosion. Knock sensor No. 2 is located on driver side of engine under intake manifold closer to rear of engine. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If sensor connector was repaired, erase DTC memory and test drive vehicle. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Using a DVOM, measure resistance between the following knock sensor connector (sensor side) terminals: Knock sensor terminals No. 1 and 2. Knock sensor terminals No. 1 and 3. Knock sensor terminals No. 2 and 3. Resistance specification is infinity (no continuity). If resistance is infinity, go to next step. If resistance is not infinity, replace knock sensor No. 2. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Turn ignition off. Connect VAG 1598/22 test box to PCM harness connector. Using a DVOM, measure resistance between knock sensor connector (harness side) and the following terminals: Knock sensor connector (harness side) terminal No. 1 and test box socket 60. Knock sensor connector (harness side) terminal No. 2 and test box socket 67. Knock sensor connector (harness side) terminal No. 3 and test box socket 2. Resistance specification is 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open in wiring harness as necessary. See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) WIRING DIAGRAMS article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using a DVOM, measure resistance between knock sensor connector (harness side) and the following terminals: Knock sensor connector (harness side) terminal No. 2 and test box socket 60. Knock sensor connector (harness side) terminal No. 3 and test box socket 60. Knock sensor connector (harness side) terminal No. 3 and test box socket 67. Resistance specification is infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness as necessary. See apprpriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Loosen knock sensor No. 2 mounting bolt and retighten to 15 ft. lbs. (20 N.m). If DTC still exists, replace knock sensor No. 2. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If DTC no longer is stored, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1337/17745 & P1338/17746: CAMSHAFT POSITION SENSOR FAILURE

  1. Inspect Camshaft Position (CMP) sensor connector for looseness and/or corrosion. CMP sensor is located at front driver side of engine. Repair sensor connector as necessary. If sensor connector was not repaired, go to next step. If sensor connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect Camshaft Position (CMP) sensor 3-pin connector. Turn ignition on. Connect a DVOM between CMP sensor connector (harness side) terminals No. 1 and 3.
  3. Voltage should be 9-14.5 volts. If voltage is within specification, go to next step. If voltage is not to specification, repair wiring harness between CMP sensor connector and Powertrain Control Module (PCM). See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Turn ignition off. Connect VAG 1598/22 test box to PCM harness connector. Using a DVOM, measure resistance between CMP sensor connector (harness side) and the following terminals: CMP sensor connector (harness side) terminal No. 1 and test box socket 11. CMP sensor connector (harness side) terminal No. 2 and test box socket 76. CMP sensor connector (harness side) terminal No. 3 and test box socket 67. Resistance specification is 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open in wiring harness as necessary. See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  5. Using a DVOM, measure resistance between CMP sensor connector (harness side) and the following terminals: CMP sensor connector (harness side) terminal No. 2 and test box socket 11. CMP sensor connector (harness side) terminal No. 3 and test box socket 11. CMP sensor connector (harness side) terminal No. 3 and test box socket 76. Resistance specification is infinity. If resistance is infinity, go to next step. If resistance is not infinity, repair short in wiring harness as necessary. See WIRING DIAGRAMS article. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  6. If wiring is okay and voltage between CMP connector (harness side) terminals No. 1 and 3 is okay, replace CMP sensor. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  7. If wiring is okay, but there is no voltage between CMP connector (harness side) terminals No. 1 and 3, replace PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1386/17794: PCM KNOCK CONTROL CIRCUIT ERROR

No test procedure is required for this fault code. Replace Powertrain Control Module (PCM). See PCM REPLACEMENT in SELF-DIAGNOSTICS - INTRODUCTION article.

DTC P1410/17818: TANK VENTILATION VALVE CIRCUIT SHORT TO B+

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check EVAP canister purge regulator valve utilizing Output Diagnostic Test Mode (DTM). Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1425/17833 & P1426/17834: TANK VENTILATION VALVE FAILURE

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check EVAP canister purge regulator valve utilizing Output Diagnostic Test Mode (DTM). Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1471-73/17879-81 & P1475-77/17883-85: EVAP EMISSION LEAK DETECTION PUMP FAILURE

  1. Disconnect 3-pin EVAP Leak Detection Pump (LDP) connector. LDP connector is located behind left rear wheel housing liner. Using a DVOM, measure resistance between LDP connector (component side) terminals No. 1 and 3. Resistance should be 640-720 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace LDP. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Using a DVOM, measure resistance between LDP connector (component side) terminals No. 2 and 3. Resistance should be 17.5-27.5 ohms. If resistance is within specification, go to next step. If resistance is not within specification, replace LDP. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Connect VAG 1527B LED voltage tester between LDP connector (harness side) terminal No. 3 and ground. Start engine and idle. LED voltage tester should illuminate. If LED voltage tester illuminates, system is functioning properly. Test is complete. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. If LED voltage tester does not illuminate, check fuse for LDP. Inspect wiring between LPD connector (harness side) terminal No. 3 and fuse for an open circuit. Check fuel pump relay operation. See SYSTEM & COMPONENT TESTING article. Repair as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1500-02/17908-10: FUEL PUMP RELAY CIRCUIT FAILURE

Check fuel pump relay operation. See SYSTEM & COMPONENT TESTING article. Repair as necessary. Erase DTC memory. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION article.

DTC P1505/17913 & P1506/17914: CLOSED TP SENSOR SWITCH FAILURE

  1. Inspect Throttle Valve Control Module (TVCM) 8-pin connector for looseness and/or corrosion. Repair connector as necessary. If connector was okay, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect TVCM 8-pin connector. Turn ignition on. Using DVOM, check resistance between specified terminals. TVCM connector terminals No. 3 and 7. TVCM connector terminals No. 4 and 7. Voltage should be 9-14.5 volts for first measurement. Voltage should be 4-6 volts for second measurement. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 3 and test box socket 69. TVCM connector terminal No. 4 and test box socket 62. TVCM connector terminal No. 7 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 7 and test box socket 69. TVCM connector terminal No. 7 and test box socket 62. TVCM connector terminal No. 4 and test box socket 67. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1543-45/17951-53: TP SENSOR FAILURE

  1. Inspect Throttle Valve Control Module (TVCM) 8-pin connector for looseness and/or corrosion. Repair connector as necessary. If connector was okay, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect TVCM 8-pin connector. Turn ignition on. Using DVOM, check resistance between specified terminals. TVCM connector terminals No. 3 and 7. TVCM connector terminals No. 4 and 7. Voltage should be 9-14.5 volts for first measurement. Voltage should be 4-6 volts for second measurement. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 3 and test box socket 69. TVCM connector terminal No. 4 and test box socket 62. TVCM connector terminal No. 7 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 7 and test box socket 69. TVCM connector terminal No. 7 and test box socket 62. TVCM connector terminal No. 4 and test box socket 67. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1546-48/17954-56: BOOST PRESSURE CONTROL VALVE FAILURE

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check boost pressure regulation. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1555-57/17963-65: CHARGE PRESSURE DEVIATION

VAG 1551 is necessary to diagnose this code. VAG 1551 is used to check boost pressure regulation. Follow test equipment manufacturer's instructions for VAG 1551 operation.

DTC P1558/17966 & P1559/17967: THROTTLE ACTUATOR/POSITION SENSOR FAILURE

  1. Inspect Throttle Valve Control Module (TVCM) 8-pin connector for looseness and/or corrosion. Repair connector as necessary. If connector was okay, go to next step. If connector was repaired, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect TVCM 8-pin connector. Turn ignition on. Using DVOM, check resistance between specified terminals. TVCM connector terminals No. 3 and 7. TVCM connector terminals No. 4 and 7. Voltage should be 9-14.5 volts for first measurement. Voltage should be 4-6 volts for second measurement. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, go to next step.
  3. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 3 and test box socket 69. TVCM connector terminal No. 4 and test box socket 62. TVCM connector terminal No. 7 and test box socket 67. Resistance should be 1.5 ohms or less. If resistance is within specification, go to next step. If resistance is not within specification, repair open wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  4. Using DVOM, check resistance between TVCM connector terminals and specified test box sockets. TVCM connector terminal No. 7 and test box socket 69. TVCM connector terminal No. 7 and test box socket 62. TVCM connector terminal No. 4 and test box socket 67. Resistance should be infinity. If resistance is infinity, replace faulty PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If resistance is not infinity, repair short in wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1560/17968: MAXIMUM ENGINE SPEED EXCEEDED

Repair engine mechanical failure as necessary.

DTC P1602/18010: PCM LOW VOLTAGE

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using DVOM, check voltage between test box sockets No. 2 and 3, then 1 and 3.
  2. Voltage should be 10-14.5 volts for each reading. If voltage is within specification, erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article. If voltage is not within specification, repair wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1606/18014: ROUGH ROAD SIGNAL DETECTED

Note. If Anti-Lock Brake System (ABS) module senses a spinning wheel, it produces a rough road signal. When Powertrain Control Module (PCM) sees a rough road signal, misfire recognition is turned off. If a misfire DTC is stored, it is a subsequent malfunction which may be disregarded.

Note. This DTC may be stored if emission testing a front wheel drive vehicle with ABS/EDL, and only front wheels are turning while rear wheels are stationary.

  1. VAG 1551 is necessary to diagnose this code. Ensure PCM coding is correct. See PCM CODING in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  2. Turn ignition off. Disconnect Powertrain Control Module (PCM) connectors. Connect VAG 1598/22 test box to PCM wiring harness. Using a DVOM, check for a short or open circuit between PCM and ABS module. See appropriate wiring diagram in «WIRING DIAGAMS»(/audi/a4/b5-1999-2001/remont/wiring-diagrams-engine-performance/#engine-performance-wiring-diagrams) article. Repair as necessary. If wiring is okay, go to next step. If wiring is not okay, repair wiring harness as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.
  3. Replace ABS module. If DTC occurs again after replacing ABS module, replace PCM. See PCM REPLACEMENT in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1611/18019: MIL CIRCUIT/TCM SHORT TO GROUND

Check wiring between Powertrain Control Module (PCM) and Transmission Control Module (TCM). See WIRING DIAGRAMS article. Repair as necessary. Erase DTC memory. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION article.

DTC P1612/18020: PCM INCORRECT CODING

Code PCM correctly. See PCM CODING in SELF-DIAGNOSTICS - INTRODUCTION article.

DTC P1613/18021: MIL CIRCUIT OPEN OR SHORT TO B+

  1. Check Transmission Control Module (TCM) DTC memory. See appropriate ELECTRONIC CONTROLS article in TRANSMISSIONS. Repair as necessary.
  2. Check wiring between Powertrain Control Module (PCM) and Transmission Control Module (TCM). See WIRING DIAGRAMS article. Repair as necessary. Erase DTC memory. See CLEARING CODES in «SELF-DIAGNOSTICS - INTRODUCTION»(/audi/a4/b5-1999-2001/remont/testing-diagnostics/#engine-controls-self-diagnostics-introduction) article.

DTC P1624/18032: MIL REQUEST SIGNAL ACTIVE

Check Transmission Control Module (TCM) DTC memory. See appropriate ELECTRONIC CONTROLS article in TRANSMISSIONS. Repair as necessary.

DTC P1640/18048: INTERNAL PCM (EEPROM) ERROR

No test procedure is required for this fault code. Replace Powertrain Control Module (PCM). See PCM REPLACEMENT in SELF-DIAGNOSTICS - INTRODUCTION article.

See also:
• SELF-DIAGNOSTICS - INTRODUCTION
• WIRING DIAGAMS
• SYSTEM & COMPONENT TESTING
• P0102
• P0107
• P0112
• P0116
• P0121
• P0130
• P0133
• P0134
• P0136
• P0300
• P0321
• P0327
• P0422
• P0441
• P0442
• P0501
• P0506
• P0560
• P0601
• P1102
• P1105
• P1127
• P1128
• P1136
• P1137
• P1176
• P1196
• P1198
• P1213
• P1225
• P1237
• P1250
• P1337
• P1386
• P1410
• P1425
• P1471
• P1500
• P1505
• P1543
• P1546
• P1555
• P1558
• P1560
• P1602
• P1606
• P1611
• P1612
• P1613
• P1624
• P1640

More articles — Engine Performance