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Engine Controls - on Board Diagnostic (OBD), Generic Scan Tool -1.8l 5v Turbo, Amb Audi A4 B6

Testing & Diagnostics 2 illustrations ~6199 words

Characteristics of On Board Diagnostic (OBD)

The Engine Control Module (Motronic Engine Control Module -J220-) is equipped with DTC memory.

Malfunction recognition

If malfunctions occur at the exhaust relevant systems or components, they are stored in DTC memory with a description of the malfunction type.

The stored malfunctions can be checked with a standard diagnostic tester Mode 3: Check DTC memory. See MODE 3: CHECK DTC MEMORY .

The Engine Control Module (ECM) differentiates between different DTCs after evaluating the information. See DIAGNOSTIC TROUBLE CODE (DTC) TABLES .

If the ECM recognizes malfunctions that lead to a worsening of emissions values, it indicates them by lighting the Malfunction Indicator Lamp (MIL) -K83- in the instrument cluster. See MALFUNCTION INDICATOR LAMP (MIL) -K83- IN INSTRUMENT CLUSTER .

E-Gas -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster. See ELECTRONIC POWER CONTROL (EPC) WARNING LAMP -K132- IN INSTRUMENT CLUSTER .

When disconnecting harness connectors from Engine Control Module (ECM) or when disconnecting battery, all adaptation values in the control module are erased. DTC memory content will remain intact however. After re-connecting harness connectors or battery, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. If DTC memory was erased, generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Identification of Engine Control Module (ECM)

The control module version is displayed when "Mode 9: Vehicle information" under address word 33. See MODE 9: VEHICLE INFORMATION .

Engine Control Module (ECM) equipment

Engine codeAMB
System identificationMotronic
Emissions values according toULEV
On Board Diagnostic (OBD)OBD II CARB and OBD-EPA
DTC memoryPermanent memory (1)
Memory for adaptation valuesTemporary memory (2)
E-GasYes
Knock sensor control2 sensors
Charge air regulationYes
Oxygen sensor control2 sensors
Camshaft adjustmentYes
Intake manifold change overNo
Secondary air systemYes
(1) Independent of voltage supply. (2) The values are erased when voltage is interrupted.
(1)Independent of voltage supply.
(2)The values are erased when voltage is interrupted.

ENGINE CONTROL MODULE (ECM) EQUIPMENT

Malfunction Indicator Lamp (MIL) -K83- in instrument cluster

If the ECM recognizes malfunctions that lead to a worsening of emissions values, it indicates them by lighting the Malfunction Indicator Lamp (MIL) -K83- in the instrument cluster.

Function

After ignition is switched on, Engine Control Module (ECM) switches on the Malfunction Indicator Lamp (MIL) -K83-. Shortly after engine is started, Malfunction Indicator Lamp (MIL) -K83- goes out if, first of all, Engine Control Module (ECM) does not detect a malfunction that worsens the emissions values and, secondly, activation of the lamp by the Engine Control Module (ECM) is OK.

Malfunction messages

If malfunctions that worsen emissions are recognized during operation of the engine, Engine Control Module (ECM) switches on Malfunction Indicator Lamp (MIL) -K83-. An entry is made in DTC memory of ECM at the same time.

Malfunction Indicator Lamp (MIL) -K83- can blink or remain lit continuously. In any case the DTC memory must be checked. See MODE 3: CHECK DTC MEMORY . And erased if necessary". See MODE 4: RESET/ERASE DIAGNOSTIC DATA .

Continuously lit

There is a malfunction that causes increased emissions values. DTC memory of Engine Control Module (ECM) must be checked.

Blinking

There is a malfunction that causes damage to the catalytic converter in this driving condition (e.g. combustion misfire). In this case, vehicle must only be driven at reduced performance!

Note. If there is a driveability problem or a customer complaint and Malfunction Indicator Lamp (MIL) -K83- does not light up, DTC memory must be checked. There may be DTCs stored that do not cause the exhaust MIL to light up immediately, but only after engine is started again and malfunction is recognized again.

Malfunction Indicator Lamp (MIL) function test

  1. Switch ignition on. Malfunction Indicator Lamp (MIL) -K83- must light up
  2. Start engine. Shortly after engine is started, Malfunction Indicator Lamp (MIL) -K83- goes out if there are no exhaust-relevant malfunctions stored in DTC memory

Note. The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via CAN-Bus. Check terminal resistance for CAN-Bus. See TERMINAL RESISTANCE FOR CAN-BUS, CHECKING .

Electronic Power Control (EPC) Warning Lamp -K132- in instrument cluster

"EPC" is an abbreviation and stands for Electronic Power Control (E-gas).

Engine Control Module (ECM) checks all components that are important for function of the E-Gas system after ignition is switched on.

If malfunctions are recognized in the E-Gas system during operation of the engine, the Engine Control Module (ECM) switches on the Electronic Power Control (EPC) Warning Lamp -K132-. An entry is made in DTC memory of ECM at the same time.

  1. Switch ignition on. Engine Control Module (ECM) switches EPC lamp on.
  2. Start engine. Shortly after engine is started, the EPC warning lamp will go out if there are no malfunctions stored in DTC memory that relate to the E-gas system

Note. The switch-on signal for Malfunction Indicator Lamp (MIL) is transferred from the Engine Control Module (ECM) to the instrument cluster via CAN-Bus. Check terminal resistance for CAN-Bus. See TERMINAL RESISTANCE FOR CAN-BUS, CHECKING .

Safety precautions

If test and measuring equipment is required during road test, note the following

CAUTIONTest and measuring equipment must always be secured to the rear seat and operated from there by a second person. If test and measuring equipment is operated from the passenger seat, the person seated there could be injured in the event of an accident involving deployment of the passenger-side airbag.

Special tools and equipment

  1. Vehicle Diagnostic and Information System VAS 5052 with diagnostic wire VAS 5052/3

Test requirements

  1. Fuses for engine electronics OK See appropriate System Wiring Diagram article.
  2. Ground (GND) connections at engine and transmission OK
  3. Battery voltage at least 12.7 V
  4. Parking brake engaged.
  5. Vehicles with automatic transmission: Selector lever in position "P" or "N".
  6. Electrical consumers switched off (radiator fan must NOT run during test).
  7. A/C switched off.

Scheme 76

Scheme 76: Work procedure
Scheme 76: Work procedure
  1. Switch ignition off.
  2. Connect Vehicle Diagnostic and Information System VAS 5052 with diagnostic wire VAS 5052/3. CAUTION: Observe safety precautions. See «Safety precautions»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__safety-precautions) . NOTE: If a malfunction message is displayed: See operating instructions for Vehicle Diagnostic and Information System VAS 5052. Depending on the desired mode "Selectable diagnostic modes" table. See «SELECT DIAGNOSTIC MODE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__select-diagnostic-mode) .
  3. Switch ignition on.
  4. Start engine.

Select diagnostic mode

  1. After connecting the diagnostic tester and selecting diagnostic function "33 - OBD", several diagnostic modes can be selected.
  2. The following diagnostic modes monitor all components and systems which influence the emission quality. ECM DIAGNOSTIC MODES Selectable diagnostic modes Requirement Ignition on, engine standing Engine running at idle Vehicle in drive mode Mode 1: Check measured values See «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) . Yes Yes Yes Mode 2: Checking operating conditions See «MODE 2: CHECKING OPERATING CONDITIONS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-2-checking-operating-conditions) . Yes Yes Yes Mode 3: Check DTC Memory See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) . Yes (1) Yes Yes Mode 4: Reset/erase diagnostic data See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) . Yes Yes Yes Mode 5: Check output of oxygen sensor signals See «MODE 5: CHECK OXYGEN SENSOR OUTPUT SIGNALS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-5-check-oxygen-sensor-output) . Yes Yes Yes Mode 6: Check test results of components that are not continuously monitored See «MODE 6: CHECK TEST RESULTS OF COMPONENTS THAT ARE NOT CONTINUOUSLY MONITORED»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-6-check-test-results-of) . No Yes Yes Mode 7: Check test results of components that are continuously monitored See «MODE 7: CHECK TEST RESULTS OF COMPONENTS THAT ARE CONTINUOUSLY MONITORED»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-7-check-test-results-of) . Yes (1) Yes Yes Mode 8: Tank leak test See «MODE 8: TANK LEAK TEST»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-8-tank-leak-test) . No Yes Yes Mode 9: Vehicle information See «MODE 9: VEHICLE INFORMATION»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-9-vehicle-information) . Yes Yes Yes (1) If the engine does not start, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.

Recommended special tools and equipment

  1. VAG1598/31 test box

Work procedure

  1. Switch ignition off.
  2. Remove rubber seal for plenum chamber cover.
  3. Remove plenum chamber cover -1- toward front (arrows).
  4. Pry off both covers -3- using a screwdriver.
  5. Loosen hex-nuts -4- by several turns.
  6. Loosen wiper arm -2- from wiper axle by lightly tilting.
  7. Remove hex nuts completely and remove wiper arms.
  8. Disconnect securing clips -1- and remove cowl grill -5-.
  9. Remove cover for E-box, plenum chamber (arrows).
  10. Using a screwdriver, pry off retaining bracket (arrows).
  11. Disengage connector catches (arrows) and disconnect harness connectors -1- and -2- from Engine Control Module (ECM). NOTE: Adaptation values are erased when connector is disconnected from the Engine Control Module (ECM), DTC memory content remains intact.
  12. Connect e.g. VAG1598/31 test box to connectors of wiring harness. Connect Ground (GND) clip of test box (not visible in illustration) to Ground (GND). Relevant test procedures note whether Engine Control Module (ECM) should also be connected to the test box. CAUTION: To avoid damaging electronic components, set measuring range before connecting test leads and observe all test requirements.

Assembling

Assembly is performed in the reverse order of removal, noting the following

Final procedures

After connecting harness connectors to Engine Control Module (ECM), the following work steps must be performed in the mentioned sequence

  1. Check DTC memory "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory "Mode 4: Reset/erase diagnostic data". See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. If DTC memory was erased, generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 1: Check measured values

In this diagnostic mode, all emissions-relevant measured values are displayed.

Test requirement

  1. Coolant temperature at least 80 °C. "PID 05: Coolant temperature".
  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. In diagnostic function "33 - OBD", select "Mode 1: Check measuring values".
  3. Select the desired measured value according to the PID (Parameter Identification), e.g. "PID 05 - Coolant temperature", via the following table. NOTE: Specified values assigned to the measuring values are found in the corresponding component- and function tests. Measuring values of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and measuring values of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics". MODE 1: PID MEASURING VALUES PID (1) Display measuring values 01: Monitoring status since erasing DTC memory 03: Condition of the fuel system 04: Calculated load condition value 05: Coolant temperature 06: Short time gasoline-air ratio bank 1 07: Gasoline-air ratio bank 1 12: Engine rotations per minute (RPM) 13: Vehicle speed 14: Valve timing adjustment at 1. cyl. to "advance" 15: Intake Air Temperature (IAT) 16: Air flow quantity at Mass Air Flow (MAF) sensor 17: Throttle valve position (absolute) 18: Availability status of secondary air 19: Available oxygen B1-S1, B1-S2 20: Sensor voltage Bank 1 - sensor 1 21: Sensor voltage Bank 1 - sensor 2 28: OBD-requirement for which this vehicle is designed -OBD II-CARB and OBD-EPA 52: Current output of oxygen sensor signal value Bank 1 -sensor 1 (1) PIDs that are not relevant are not listed.
  4. End diagnosis and switch ignition off.

Mode 2: Checking operating conditions

The operating conditions under which the Engine Control Module has detected and stored an emissions-relevant DTC are displayed in this diagnostic mode.

  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. In diagnostic function "33 - OBD", select "Mode 2: Check operating conditions."
  3. Select the desired operating condition via the following table according to the PID (Parameter Identification), e.g. "PID 05: Coolant temperature". NOTE: Measuring values of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and measuring values of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics".
PID (1)Display operating conditions
02DTC which triggered the current reception of all control module information
03Condition of the fuel system
04Calculated load condition value
05Coolant temperature
06Short time gasoline-air ratio bank 1
07Gasoline-air ratio bank 1
12Engine rotations per minute (RPM)
13Vehicle speed
(1) PIDs that are not relevant are not listed.
(1)PIDs that are not relevant are not listed.

MODE 2: PID VALUES

If DTCs are displayed in "PID 02"

  1. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . SAE P2xxx-DTCs. See «SAE P2XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .

The following work steps must be performed in the described sequence after the malfunction(s) have been repaired

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 3: Check DTC Memory

This diagnostic mode indicates all stored DTCs of components and systems which are emission relevant.

Malfunction Indicator Lamp (MIL) -K83- in instrument cluster lights up for one DTC entry.

SAE Diagnostic Trouble Codes (DTCs)

The DTC consists of a 5-digit alpha-numeric value with the following meaning

Component group
P x x x xDTC for drivetrain
Norm-Code
P 0 x x xDTCs defined by SAE with specified malfunction texts
P 1 x x xAdditional emission relevant DTCs provided by manufacturer
P 2 x x xDTCs defined by SAE with specified texts, from MY 2000
P 3 x x xAdditional emissions relevant DTCs provided by manufacturer from MY 2000
Repair group
P x 0 x xFuel and air mixture and additional emission regulations
P x 1 x xFuel and air ratios
P x 2 x xFuel and air ratios
P x 3 x xIgnition system
P x 4 x xAdditional exhaust regulation
P x 5 x xSpeed and idle control
P x 6 x xControl module and output signals
P x 7 x xTransmission
P x 8 x xTransmission
P x 9 x xControl modules, input and output signals

SAE DIAGNOSTIC TROUBLE CODE EXPLANATION

  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle. NOTE: If the engine does not start, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.
  3. In diagnostic function "33 - OBD", select "Mode 3: Check DTC memory." The number of stored malfunctions or "0 malfunctions detected" is displayed. NOTE: The DTC tables are sorted by SAE code. Stored malfunctions of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and stored malfunctions of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics". In addition, emission-relevant malfunctions are indicated in the instrument cluster via the Malfunction Indicator Lamp (MIL) -K83-. E-Gas -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster. In "Mode 2: Check operating conditions", it can be determined at which operating condition the Engine Control Module detected and stored a malfunction. See «MODE 2: CHECKING OPERATING CONDITIONS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-2-checking-operating-conditions) . SAE DIAGNOSTIC TROUBLE CODE EXAMPLE Indication example Explanation P0444 SAE Diagnostic Trouble Code (DTC) Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- malfunctioning wiring path or malfunctioning component Open circuit Malfunction type as text
  4. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . SAE P2xxx-DTCs. See «SAE P2XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .

The following work steps must be performed in the described sequence after the malfunction(s) have been repaired

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 4: Reset/erase diagnostic data

The following functions are performed in this diagnostic mode

  1. All emission relevant malfunctions in DTC memory will be erased.
  2. The operating conditions at which a malfunction was stored will be reset. See «MODE 2: CHECKING OPERATING CONDITIONS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-2-checking-operating-conditions) .
  3. All adaptation values will be reset.
  4. All test results of the diagnostic functions of control module will be reset.
  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle.
  3. In diagnostic function "33 - OBD", first select "Mode 3: Check DTC memory". See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  4. Then select "Mode 4: Reset/erase diagnostic data". Display: "Diagnostic data are being erased" DTC memory is erased.
  5. End diagnosis and switch ignition off.

Mode 5: Check oxygen sensor output signals

The static values of the oxygen sensors are indicated in this diagnostic mode.

The values of the individual oxygen sensor signal outputs must reach the specified value or must be within the min.- and max.- limits.

  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. Coolant temperature at least 80 °C. See "PID 05: Coolant temperature" in «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle.
  3. In diagnostic function "33 - OBD", select "Mode 5: Check output of oxygen sensor signals".
  4. Via the following table, select the desired output of oxygen sensor signals according to Test ID (Test Identification), e.g. "01: Rich to lean sensor barrier voltage".
  5. Check specified values at idle. NOTE: When selecting the diagnostic mode, the entry is always performed in "Bank 1 sensor 1". If either the V.A.G 1551/1552 Scan Tool (ST) or the VAS5051/5052 Vehicle Diagnostic, Testing and Information System is used for checking the output of oxygen sensor signals, the respective oxygen sensor can be selected by pressing buttons 1 and 2: Button 1 = Bank 1 sensor 1, Button 2 = Bank 1 sensor 2. MODE 5 TEST-ID EVALUATION Test-ID (1) Diagnostic text Evaluation 01: Rich to lean sensor barrier voltage See «EVALUATION TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-01-rich-to-lean) . 02: Lean to rich sensor barrier voltage See «Evaluation test-ID 02: Lean to rich sensor barrier voltage»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-02-lean-to-rich) . 07: Minimum voltage at sensor for test cycle See «Evaluation test-ID 07: Minimum voltage at sensor for test cycle»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-07-minimum-voltage-at) . 08: Maximum voltage at sensor for test cycle See «EVALUATION TEST-ID 08: MAXIMUM VOLTAGE AT SENSOR FOR TEST CYCLE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-08-maximum-voltage-at) . 129: Current value of oxygen sensor signal See «EVALUATION TEST-ID 129: CURRENT VALUE OF OXYGEN SENSOR SIGNAL»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-129-current-value-of) . 130: Specified value of oxygen sensor signal See «EVALUATION TEST-ID 130: SPECIFIED VALUE OF OXYGEN SENSOR SIGNAL»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-130-specified-value-of) . 131: Dynamic value See «Evaluation test-ID 131: Dynamic value»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-131-dynamic-value) . 132: Shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter See «EVALUATION TEST-ID 132: SHIFT OF OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER VIA OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__evaluation-test-id-132-shift-of-oxygen) . (1) Test IDs that are not relevant are not listed.
  6. End diagnosis and switch ignition off.

Evaluation test-ID 01: Rich to lean sensor barrier voltage

Oxygen sensorSpecified value
Bank 1, sensor 20.575 V

OXYGEN SENSOR VOLTAGE (TEST-ID 01)

If specified value is not obtained

  1. Replace oxygen sensor behind catalytic converter. See «OXYGEN SENSORS, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb) .

Evaluation test-ID 02: Lean to rich sensor barrier voltage

Oxygen sensorSpecified value
Bank 1, sensor 20.575 V

OXYGEN SENSOR VOLTAGE (TEST-ID 02)

If specified value is not obtained

  1. Replace oxygen sensor behind catalytic converter. See «OXYGEN SENSORS, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb) .

Evaluation test-ID 07: Minimum voltage at sensor for test cycle

Oxygen sensorSpecified value
Min.Max.
Bank 1, sensor 20.000 V0.565 V

OXYGEN SENSOR VOLTAGE (TEST-ID 07)

If the specified value is not reached

  1. Short circuit to Ground (GND) in oxygen sensor or in wire.
  1. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb__oxygen-sensors-and-oxygen-sensor-regulation) .

If the specified value is exceeded

  1. Oxygen sensor not ready for operation
  2. Oxygen sensor heater faulty Test oxygen sensor heater behind catalytic converter. See «OXYGEN SENSOR (O2S) HEATER 1 -Z29- BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  3. Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb__oxygen-sensors-and-oxygen-sensor-regulation) .

Evaluation test-ID 08: Maximum voltage at sensor for test cycle

Rich to lean sensor barrier voltageSpecified value
Min.Max.
Bank 1, sensor 20.590 V1.040 V

SENSOR VOLTAGE (TEST-ID 08)

If the specification is exceeded or not met

  1. Oxygen sensor not ready for operation
  2. Oxygen sensor heater faulty Test oxygen sensor heater behind catalytic converter. See «OXYGEN SENSOR (O2S) HEATER 1 -Z29- BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  3. Short circuit to Ground (GND) or B+ or open circuit in wiring in oxygen sensor or in wire. Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See «OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb__oxygen-sensors-and-oxygen-sensor-regulation) .

Evaluation test-ID 129: Current value of oxygen sensor signal

Current value of oxygen sensor signalSpecification (1)
Min.Max.
Bank 1, sensor 190,000255,000
(1) Control module internal calculated value
(1)Control module internal calculated value

OXYGEN SENSOR SIGNAL CURRENT VALUE (TEST-ID 129)

If the specification is exceeded or not met

  1. Oxygen sensor not ready for operation
  2. Oxygen sensor heater faulty Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR (O2S) HEATER -Z19- BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  3. Short circuit to Ground (GND) or B+ or open circuit in wiring in oxygen sensor or in wire.
  4. Oxygen sensor faulty Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .

Evaluation test-ID 130: Specified value of oxygen sensor signal

Specified value of oxygen sensor signalSpecification (1)
Min.Max.
Bank 1, sensor 190,000255,000
(1) Control module internal calculated value
(1)Control module internal calculated value

OXYGEN SENSOR SIGNAL SPECIFIED VALUE (TEST-ID 130)

If the specification is exceeded or not met

  1. Replace Engine Control Module (ECM).

Evaluation test-ID 131: Dynamic value

Dynamic valueSpecification (1)
Min.Max.
Bank 1, sensor 136,000205,000
(1) Control module internal calculated value
(1)Control module internal calculated value

DYNAMIC VALUE (TEST-ID 131)

If the specified value is not reached

  1. Oxygen sensor is aged Replace oxygen sensor before catalytic converter. See «OXYGEN SENSORS, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb) .

Evaluation test-ID 132: Shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converter

Shift of oxygen sensor regulation before catalytic converter via oxygen sensor regulation behind catalytic converterSpecification (1)
Min.Max.
Bank 1, sensor 176,000180,000
(1) Control module internal calculated value
(1)Control module internal calculated value

OXYGEN SENSOR REGULATION (TEST-ID 132)

If the specified value is not reached

  1. Oxygen sensor not ready for operation
  2. Oxygen sensor heater faulty Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR (O2S) HEATER -Z19- BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  3. Short circuit to Ground (GND) or open circuit in wiring in oxygen sensor or in wire.
  4. Oxygen sensor faulty Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  5. Mixture too rich Check fuel pressure regulator and residual pressure. See «SYSTEM PRESSURE AND RESIDUAL PRESSURE, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb__system-pressure-and-residual-pressure-checking) . Check fuel injectors. See «FUEL INJECTORS, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) . Check Evaporative Emission (EVAP) canister purge regulator valve -N80-. See «CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb) .

If the specified value is exceeded

  1. Oxygen sensor not ready for operation
  2. Oxygen sensor heater faulty Test oxygen sensor heater before catalytic converter. See «OXYGEN SENSOR (O2S) HEATER -Z19- BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  3. Short circuit to B+ or open circuit in wiring in oxygen sensor or in wire.
  4. Oxygen sensor faulty Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See «HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  5. Mixture too lean Checking system pressure and residual pressure. See «SYSTEM PRESSURE AND RESIDUAL PRESSURE, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb__system-pressure-and-residual-pressure-checking) . Check fuel injectors. See «FUEL INJECTORS, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) . Check intake system for leaks (false air). See «INTAKE SYSTEM, CHECKING FOR LEAKS (FALSE AIR)»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb__intake-system-checking-for-leaks-false) . Check Fuel Pump (FP). See «FUEL PUMP (FP), ELECTRICAL TESTING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb) for FWD and «FUEL PUMP (FP), ELECTRICAL TESTING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb) for AWD. Check exhaust system for proper seal. See «EXHAUST SYSTEM, CHECKING FOR LEAKS»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb__exhaust-system-checking-for-leaks) . Check Secondary Air Injection (AIR) system for proper seal. See «SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb__secondary-air-injection-air-system-checking) . Check vacuum lines for proper seal.

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 6: Check test results of components that are not continuously monitored

This diagnostic mode displays the test results of emission relevant components and systems which are not continuously monitored.

The values of the individual test results must reach the specified value or must be within the min.- and max.- limits.

Test-IDComponentsTest
01Catalytic converterSee Test-ID 01: Catalytic converter .
02Oxygen sensor monitoringSee Test-ID 09: Engine Coolant Temperature (ECT) Sensor -G62-/coolant regulator .
03Secondary Air Injection (AIR) systemSee TEST-ID 03: SECONDARY AIR INJECTION (AIR) SYSTEM .
05Tank ventilation systemSee TEST-ID 05: TANK VENTILATION SYSTEM .

COMPONENTS TEST (MODE 6)

  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. Coolant temperature at least 80 °C. See "PID 05: Coolant temperature". See «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
CAUTIONTo reduce the risk of accident during road tests, always observe safety precautions. See SAFETY PRECAUTIONS .
  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.

The following operating conditions must be met during this road test

  1. Engine speed 1800 to 2200 RPM. See "PID 12: Engine rotations per minute", «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  2. Vehicle speed constant 90 km/h. See "PID 13: Vehicle speed", «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  1. Let engine run at idle.
  2. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
  3. Select the "Test-ID 01: Catalytic converter".
  4. Check specified value at idle. Test-ID 01: CATALYTIC CONVERSION SPECIFICATION Catalytic conversion Specification (1) Bank 1 min: 8192.000 (1) Control module internal calculated value
  5. End diagnosis and switch ignition off.

If the specified values are exceeded

  1. Replace the front exhaust pipe with catalytic converter. See «CATALYTIC CONVERTER, REMOVING AND INSTALLING»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb) .

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.
  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .

Let vehicle cool off with the ignition switched off until the following conditions are met

  1. Intake air temperature 10 to 50 °C. See "PID 15: Intake air temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  2. Coolant temperature approximately Intake Air Temperature (10 to 50 °C). See "PID 05: Coolant temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle for at least 15 minutes.
  3. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
  4. Select the "Test-ID 03: Secondary Air Injection (AIR) system"
  5. Check specified values at idle. SECONDARY AIR INJECTION (AIR) SYSTEM SPECIFICATION Secondary Air Injection (AIR) system Specification (1) Bank 1 min: 24,000 (1) Control module internal calculated value
  6. End diagnosis and switch ignition off.

If the specified values are not reached

  1. Check secondary air system for proper seal. See «SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb__secondary-air-injection-air-system-checking) .
  2. Check Secondary Air Injection (AIR) Pump Motor -V101-. See «CHECK VOLTAGE SUPPLY OF THE SECONDARY AIR INJECTION (AIR) PUMP MOTOR»(/audi/a4/b6-2000-2006/remont/exhaust/#exhaust-system-emission-controls-generic-scan-tool-18l-5v-turbo-amb) .

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.
  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. Coolant temperature 80 to 110 °C. See "PID 05: Coolant temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  3. Throttle valve angle 12.0 to 16.0%. See "PID 17: Throttle valve position (absolute)"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  1. Connect diagnostic tester. See «Connect diagnostic tester»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle for at least 15 minutes.
  3. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
  4. Select the "Test-ID 05: Tank ventilation system".
  5. Check specified values at idle. TANK VENTILATION SYSTEM SPECIFICATION Tank ventilation system Specification (1) Deviation of oxygen sensor control in direction "lean" min: 9830.000 Deviation of oxygen sensor control in direction "rich" min: 695,000 (1) Control module internal calculated value
  6. End diagnosis and switch ignition off.

If the specified values are not reached

  1. EVAP canister system, checking for proper seal. See «EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb__evap-canister-system-checking-for-proper) .
  2. Check Leak Detection Pump (LDP) -V144-. See «LEAK DETECTION PUMP (LDP) -V144-, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb) .

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.
  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
CAUTIONTo reduce the risk of accident during road tests, always observe safety precautions. See SAFETY PRECAUTIONS .
  1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Perform a road test until a coolant temperature of 80 to 100 °C is reached; See "PID 05: Coolant temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  3. Switch ignition off.
  4. Start engine at a coolant temperature of 80 to 90 °C and let it run at idle.
  5. Perform a 5 minute road test in the highest gear or in the highest driving mode on a level driving surface.

The following operating conditions must be met during this road test

  1. Engine speed 1800 to 2200 RPM. See "PID 12: Engine rotations per minute"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  2. Vehicle speed constant 90 km/h. See "PID 13: Vehicle speed"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  1. Let engine run at idle.
  2. In diagnostic function "33 - OBD", select "Mode 6: Check test results of components that are not continuously monitored".
  3. Select the "Test-ID 09: Engine Coolant Temperature (ECT) sensor/coolant regulator".
  4. Check specified values at idle. TEST-ID 09: ENGINE COOLANT TEMPERATURE SENSOR SPECIFICATION Engine Coolant Temperature (ECT) Sensor -G62-/coolant regulator Specification (1) Coolant temperature max. 0.000 (1) Control module internal calculated value
  5. End diagnosis and switch ignition off.

If specified value is not obtained

  1. Check Engine Coolant Temperature (ECT) Sensor -G62-. See «ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#multiport-fuel-injection-mfi-generic-scan-tool-18l-5v-turbo-amb) .
  2. Check coolant regulator: See

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 7: Check test results of components that are continuously monitored

This diagnostic mode indicates all stored DTCs of components and systems which are continuously monitored.

Note. In "Mode 3: Check DTC memory", no DTC entry is indicated.

  1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle. NOTE: If the engine does not start, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.
  3. In diagnostic function "33 - OBD", select "Mode 7: Check test results of components that are continuously monitored".

The number of stored malfunctions or "0 malfunctions detected" is displayed.

  1. End diagnosis and switch ignition off.
  2. Repair stored malfunction(s) according to DTC table: SAE P0xxx-DTCs. See «SAE P0xxx-DTCs»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . SAE P1xxx-DTCs. See «SAE P1XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . SAE P2xxx-DTCs. See «SAE P2XXX-DTCS»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . NOTE: The DTC tables are sorted by SAE code. In addition, emission-relevant malfunctions are indicated in the instrument cluster via the lighting up of Malfunction Indicator Lamp (MIL) -K83-. E-Gas -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster.

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 8: Tank leak test

This diagnostic mode checks the fuel system for leaks.

Note. The Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- and Leak detection pump (LDP) -V144- seal the tank system.

  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. Intake Air Temperature (IAT) maximum 60 °C. See "PID 15: Intake air temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  3. Coolant temperature 80 to 110 °C. See "PID 05: Coolant temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  4. Throttle valve angle 12.0 to 16.0%. See "PID 17: Throttle valve position (absolute)"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .

Test sequence

  1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle for at least 15 minutes.
  3. In diagnostic function "33 - OBD", select "Mode 8: Tank leak test".
  4. Select the "Test-ID 01: Tank leak test".
  5. Check specified value of tank leak test at idle.
Tank leak testSpecified value
Test function active Test function is being initiated, please wait Test off Test abortedTest OK

TEST-ID 01: TANK LEAK TEST SPECIFIED VALUE

Note. If the accelerator pedal is depressed during the test, the test will be aborted. To repeat the tank leak test, switch ignition off and start engine again and let run at idle for at least 15 minutes.

If specified value is obtained

  1. End diagnosis and switch ignition off.

If specified value is not obtained

  1. EVAP canister system, checking for proper seal. See «EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb__evap-canister-system-checking-for-proper) .
  2. Check Leak Detection Pump (LDP) -V144-. See «LEAK DETECTION PUMP (LDP) -V144-, CHECKING»(/audi/a4/b6-2000-2006/remont/fuel-system/#fuel-supply-generic-scan-tool-18l-5v-turbo-amb) .

After repair work, the following work steps must be performed in the mentioned sequence

  1. Check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. If necessary, erase DTC memory. See «MODE 4: RESET/ERASE DIAGNOSTIC DATA»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-4-reseterase-diagnostic-data) .
  3. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) . End diagnosis and switch ignition off.

Mode 9: Vehicle information

In this diagnostic mode, vehicle specific diagnostic data such as e.g. the control module versions will be displayed.

  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Switch ignition on.
  3. In diagnostic function "33 - OBD", select "Mode 9: vehicle information".
  4. Via the following table, select the desired vehicle information according to Test-ID (Test Identification).

Display vehicle information

Test-IDDiagnostic text
04Calibration identification e.g. 8E0909518AK 0003 Engine Control Module (ECM) identification 8E0927156S 1212 Transmission control module identification (for vehicles with automatic transmission)
06CVN (check sum) e.g. 0000F4A8 the check sum is different for every control module version No results

VEHICLE DIAGNOSTIC INFORMATION

  1. End diagnosis and switch ignition off.

The readiness code is an 8 digit number block that indicates the status of emission relevant diagnostics.

When the diagnostic for a system (e.g.: secondary air system) has run through successfully, the respective digit of the number block is set from 1 to 0.

Diagnostics are performed at regular intervals during normal vehicle operation. After repairing an exhaust relevant system, the readiness code should be generated via a road test to ensure that these systems are working according to specifications. If a malfunction is recognized during diagnostic, it is stored in DTC memory.

The readiness code is erased every time DTC memory is erased or when voltage supply is interrupted. DTC memory should therefore only be erased when there are DTCs stored.

  1. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  2. Coolant temperature at least 80 °C. See "PID 05: Coolant temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle.
  3. In diagnostic function "33 - OBD", select "Mode 1: Checking measured values."
  4. Select the desired measuring value "PID 01".
  5. Observe the right 8-digit number block

If all diagnoses have run through successfully, the following specified value 8-digit number block must appear

  1. Specified value: 0 0 0 0 0 0 0 0

Scheme 77

Scheme 77: Evaluation PID 01: System status-information (right 8-digit number block:)
Scheme 77: Evaluation PID 01: System status-information (right 8-digit number block:)

If a 1 is displayed instead of a 0 in the 8-digit number block

  1. Generate readiness code. See «READINESS CODE, GENERATING»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  1. Fuses for engine electronics OK See appropriate System Wiring Diagram article.
  2. Ground (GND) connections at engine and transmission OK
  3. Battery voltage at least 12.5 V
  4. Exhaust system free of leaks.
  5. Vehicles with automatic transmission: Selector lever in position "P" or "N".
  6. Electrical consumers switched off (radiator fan must NOT run during test).
  7. A/C switched off.
  8. No DTCs in DTC memory; check DTC memory. See «MODE 3: CHECK DTC MEMORY»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-3-check-dtc-memory) .
  9. Throttle valve angle 12.0 to 16.0%. See "PID 17: Throttle valve position (absolute)", «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .

Let vehicle cool off with the ignition switched off until the following conditions are met

  1. Intake air temperature 10 to 50 °C. See "PID 15: Intake air temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  2. Coolant temperature approximately Intake Air Temperature (10 to 50 °C). See "PID 05: Coolant temperature"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
CAUTIONTo reduce the risk of accident during road tests, always observe safety precautions. See SAFETY PRECAUTIONS .
  1. Connect diagnostic tester. See «CONNECT DIAGNOSTIC TESTER»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .
  2. Start engine and let run at idle for at least 15 minutes.
  3. Perform a 15 minute road test in the highest gear or in the highest driving mode on a level driving surface.

The following operating conditions must be met during this road test

  1. Engine speed 1800 to 2200 RPM. See "PID 12: Engine rotations per minute"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) .
  2. Vehicle speed constant 90 km/h. See "PID 13: Vehicle speed"; «MODE 1: CHECK MEASURED VALUES»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb__mode-1-check-measured-values) . Read readiness code. See «READ READINESS CODE»(/audi/a4/b6-2000-2006/remont/testing-diagnostics/#engine-controls-on-board-diagnostic-obd-generic-scan-tool-18l-5v-turbo-amb) .

Fuel and air mixture and additional emission regulations

SAE-DTCDTC textCorrective action
P0010"A" Camshaft Position Actuator Circuit, Bank 1Check Valve -1- for camshaft adjustment -N205-. See VALVE -1- FOR CAMSHAFT ADJUSTMENT -N205-, CHECKING .
P0011"A" Camshaft Position - Timing Over -Advanced or System Performance, Bank 1
P0012"A" Camshaft Position - Timing Over -Retarded, Bank 1

DIAGNOSTIC TROUBLE CODE P0010-P0012

SAE-DTCDTC textCorrective action
P0030HO2S Heater Control Circuit, Bank 1 Sensor 1Check oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC). See OXYGEN SENSOR (O2S) HEATER -Z19- BEFORE CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING .
P0031HO2S Heater Control Circuit Low, Bank 1 Sensor 1
P0032HO2S Heater Control Circuit High, Bank 1 Sensor 1
P0036HO2S Heater Control Circuit, Bank 1 Sensor 2Check oxygen sensor heater for Oxygen Sensors (O2S) behind Three Way Catalytic Converter (TWC). See OXYGEN SENSOR (O2S) HEATER 1 -Z29- BEHIND CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING .
P0037HO2S Heater Control Circuit Low, Bank 1 Sensor 2
P0038HO2S Heater Control Circuit High, Bank 1 Sensor 2

DIAGNOSTIC TROUBLE CODE P0030-P0038

Fuel and air ratios

SAE-DTCDTC textCorrective action
P0101Mass or Volume Air Flow Circuit Range/PerformanceCheck Mass Air Flow (MAF) Sensor -G70-. See MASS AIR FLOW (MAF) SENSOR -G70-, CHECKING . Check intake air system for leaks (false air). See INTAKE SYSTEM, CHECKING FOR LEAKS (FALSE AIR) .
P0102Mass or Volume Air Flow Circuit Low Input
P0103Mass or Volume Air Flow Circuit High Input
P0106Manifold Absolute Pressure/Barometric Pressure Circuit Range/PerformanceReplacing Engine Control Module (ECM)
P0116Engine Coolant Temperature Circuit Range/PerformanceCheck Engine Coolant Temperature (ECT) Sensor -G62-. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-, CHECKING . Check coolant regulator: See
P0117Engine Coolant Temperature Circuit Low
P0118Engine Coolant Temperature Circuit High
P0121Throttle/Pedal Position Sensor/Switch "A" Circuit Range/PerformanceCheck Throttle Valve Control Module -J338-. See THROTTLE VALVE CONTROL MODULE -J338-, CHECKING .
P0122Throttle/Pedal Position Sensor/Switch "A" Circuit Low
P0123Throttle/Pedal Position Sensor/Switch "A" Circuit High
P0130O2 Sensor Circuit, Bank 1 Sensor 1Check oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC). See OXYGEN SENSOR (O2S) HEATER -Z19- BEFORE CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING .
P0133O2 Sensor Circuit Slow Response, Bank 1 Sensor 1
P0135O2 Sensor Heater Circuit, Bank 1 Sensor 1Check oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC). See OXYGEN SENSOR (O2S) HEATER -Z19- BEFORE CATALYTIC CONVERTER, CHECKING .
P0136O2 Sensor Circuit, Bank 1 Sensor 2Check oxygen sensor heater for Oxygen Sensors (O2S) behind Three Way Catalytic Converter (TWC). See OXYGEN SENSOR (O2S) HEATER 1 -Z29- BEHIND CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING .
P0137O2 Sensor Circuit Low Voltage, Bank 1 Sensor 2
P0138O2 Sensor Circuit High Voltage, Bank 1 Sensor 2
P0139O2 Sensor Circuit Slow Response, Bank 1 Sensor 2
P0140O2 Sensor Circuit No Activity Detected, Bank 1 Sensor 2
P0141O2 Sensor Heater Circuit, Bank 1 Sensor 2Check oxygen sensor heater for Oxygen Sensors (O2S) behind Three Way Catalytic Converter (TWC). See OXYGEN SENSOR (O2S) HEATER 1 -Z29- BEHIND CATALYTIC CONVERTER, CHECKING .
P0171System Too Lean, Bank 1Check fuel pressure regulator and residual pressure. See SYSTEM PRESSURE AND RESIDUAL PRESSURE, CHECKING . Check fuel injectors. See FUEL INJECTORS, CHECKING . Check intake air system for leaks (false air). See INTAKE SYSTEM, CHECKING FOR LEAKS (FALSE AIR) . Check Fuel Pump (FP). See FUEL PUMP (FP), ELECTRICAL TESTING for FWD and FUEL PUMP (FP), ELECTRICAL TESTING for AWD. Check exhaust system for proper seal. See EXHAUST SYSTEM, CHECKING FOR LEAKS . Check Secondary Air Injection (AIR) system for proper seal. See SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FOR PROPER SEAL . Check vacuum lines for leaks
P0172System Too Rich, Bank 1Check fuel pressure regulator and residual pressure. See SYSTEM PRESSURE AND RESIDUAL PRESSURE, CHECKING . Check fuel injectors. See FUEL INJECTORS, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING . Check Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-. See CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80 .

DIAGNOSTIC TROUBLE CODE P0101-P0172

SAE-DTCDTC textCorrective action
P0201Injector Circuit/Open - Cylinder 1Check fuel injectors. See FUEL INJECTORS, CHECKING .
P0202Injector Circuit/Open - Cylinder 2
P0203Injector Circuit/Open - Cylinder 3
P0204Injector Circuit/Open - Cylinder 4
P0221Throttle/Pedal Position Sensor/Switch "B" Circuit Range/PerformanceCheck Throttle Valve Control Module -J338-. See THROTTLE VALVE CONTROL MODULE -J338-, CHECKING .
P0222Throttle/Pedal Position Sensor/Switch "B" Circuit Low
P0223Throttle/Pedal Position Sensor/Switch "B" Circuit High
P0230Fuel Pump Primary CircuitCheck Fuel Pump (FP) Relay -J17- and activation. See FUEL PUMP (FP) RELAY -J17- AND ACTIVATION, CHECKING .
P0236Turbo/Super Charger Boost Sensor "A" Circuit Range/PerformanceCheck Charge Air Pressure Sensor -G31-. See CHARGE AIR PRESSURE SENSOR -G31-, CHECKING .
P0237Turbo/Super Charger Boost Sensor "A" Circuit Low
P0238Turbo/Super Charger Boost Sensor "A" Circuit High
P0243Turbo/Super Charger Wastegate Solenoid "A"Check Wastegate Bypass Regulator Valve -N75-. See WASTEGATE BYPASS REGULATOR VALVE -N75-, CHECKING .
P0245Turbo/Super Charger Wastegate Solenoid "A" Low
P0246Turbo/Super Charger Wastegate Solenoid "A" High
P0261Cylinder 1 Injector Circuit LowCheck fuel injectors. See FUEL INJECTORS, CHECKING .
P0262Cylinder 1 Injector Circuit High
P0264Cylinder 2 Injector Circuit Low
P0265Cylinder 2 Injector Circuit High
P0267Cylinder 3 Injector Circuit Low
P0268Cylinder 3 Injector Circuit High
P0270Cylinder 4 Injector Circuit Low
P0271Cylinder 4 Injector Circuit High

DIAGNOSTIC TROUBLE CODE P0201-P0271

Ignition system

SAE-DTCDTC textCorrective action
P0300Random/Multiple Cylinder Misfire DetectedCheck fuel injectors. See FUEL INJECTORS, CHECKING . Check ignition coils with power output stages. See IGNITION COILS WITH POWER OUTPUT STAGES, CHECKING .
P0301Cylinder 1 Misfire Detected
P0302Cylinder 2 Misfire Detected
P0303Cylinder 3 Misfire Detected
P0304Cylinder 4 Misfire Detected
P0321Ignition/Distributor Engine Speed Input Circuit Range/PerformanceCheck Engine Speed (RPM) Sensor -G28-. See ENGINE SPEED (RPM) SENSOR -G28-, CHECKING .
P0322Ignition/Distributor Engine Speed Input Circuit No Signal
P0324Knock Control System ErrorCheck knock sensors. See CHECK KNOCK SENSORS .
P0327Knock Sensor 1 Circuit Low
P0328Knock Sensor 1 Circuit High
P0332Knock Sensor 2 Circuit Low
P0333Knock Sensor 2 Circuit High
P0340Camshaft Position Sensor "A" Circuit, Bank 1 or Single SensorCheck Camshaft Position (CMP) sensor. See CAMSHAFT POSITION (CMP) SENSOR -G40-, CHECKING .
P0341Camshaft Position Sensor "A" Circuit Range/Performance, Bank 1 or Single Sensor
P0342Camshaft Position Sensor "A" Circuit Low, Bank 1 or Single Sensor
P0343Camshaft Position Sensor "A" Circuit High, Bank 1 or Single Sensor
P0351Ignition Coil "A" Primary/Secondary CircuitCheck ignition coils with power output stages. See IGNITION COILS WITH POWER OUTPUT STAGES, CHECKING .
P0352Ignition Coil "B" Primary/Secondary Circuit
P0353Ignition Coil "C" Primary/Secondary Circuit
P0354Ignition Coil "D" Primary/Secondary Circuit

DIAGNOSTIC TROUBLE CODE P0300-P0354

Additional exhaust regulation

SAE-DTCDTC textCorrective action
P0411Secondary Air Injection System Incorrect Flow DetectedCheck combination valves for Secondary Air Injection (AIR) system for function and proper seal. See COMBINATION VALVE FOR SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FUNCTION AND FOR PROPER SEAL .
P0413Secondary Air Injection System Switching Valve "A" Circuit OpenCheck Secondary Air Injection (AIR) Solenoid Valve -N112-. See SECONDARY AIR INJECTION (AIR) SOLENOID VALVE -N112- CHECKING .
P0414Secondary Air Injection System Switching Valve "A" Circuit Shorted
P0418Secondary Air Injection System Control "A" CircuitCheck Secondary Air Injection (AIR) Pump Relay -J299- and activation. See SECONDARY AIR INJECTION (AIR) PUMP RELAY -J299- AND ACTIVATION, CHECKING .
P0420Catalyst System Efficiency Below Threshold, Bank 1Check Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING . Check catalytic conversion. See TEST-ID 01: CATALYTIC CONVERTER .
P0441Evaporative Emission System Incorrect Purge FlowCheck Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-. See CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80 . EVAP canister system, check for proper seal. See EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL .
P0442Evaporative Emission System Leak Detected (small leak)
P0444Evaporative Emission System Purge Control Valve Circuit Open
P0445Evaporative Emission System Purge Control Valve Circuit Shorted
P0455Evaporative Emission System Leak Detected (large leak)
P0456Evaporative Emission System Leak Detected (very small leak)

DIAGNOSTIC TROUBLE CODE P0411-P0456

Speed and idle control

SAE-DTCDTC textCorrective action
P0501Vehicle Speed Sensor "A" Range/PerformanceCheck speed signal. See SPEED SIGNAL, CHECKING .
P0506Idle Air Control System RPM Lower Than ExpectedCheck Throttle Valve Control Module -J338-. See THROTTLE VALVE CONTROL MODULE -J338-, CHECKING .
P0507Idle Air Control System RPM Higher Than Expected

DIAGNOSTIC TROUBLE CODE P0501-P0507

Control module and output signals

SAE-DTCDTC textCorrective action
P0600Serial Communication LinkCheck terminal resistance for CAN-Bus. See TERMINAL RESISTANCE FOR CAN-BUS, CHECKING .
P0601Internal Control Module Memory Check Sum ErrorReplacing Engine Control Module (ECM)
P0602Control Module Programming ErrorProcedure to code Engine Control Module (ECM): Motronic Fuel Injection and Ignition (4-cylinder Turbo); See ENCODING II ENGINE CONTROL MODULE (ECM) .
P0604Internal Control Module Random Access Memory (RAM) ErrorReplacing Engine Control Module (ECM)
P0606ECM/PCM Processor
P0638Throttle Actuator Control Range/Performance, Bank 1Check Throttle Valve Control Module -J338-. See THROTTLE VALVE CONTROL MODULE -J338-, CHECKING . Check Throttle Position (TP) sensor. See THROTTLE POSITION (TP) SENSOR, CHECKING .
P0685ECM/PCM Power Relay Control Circuit/OpenCheck voltage supply for Engine Control Module (ECM). See VOLTAGE SUPPLY FOR ENGINE CONTROL MODULE (ECM), CHECKING . Check Motronic Engine Control Module (ECM) Power Supply Relay -J271- and activation. See CHECK MOTRONIC ENGINE CONTROL MODULE (ECM) POWER SUPPLY RELAY -J271- AND ACTIVATION .
P0686ECM/PCM Power Relay Control Circuit Low
P0687ECM/PCM Power Relay Control Circuit High
P0688ECM/PCM Power Relay Sense Circuit/Open

DIAGNOSTIC TROUBLE CODE P0600-P0688

Transmission

SAE-DTCDTC textCorrective action
P0704Clutch Switch Input Circuit MalfunctionCheck Clutch Vacuum Vent Valve Switch -F36-. See CLUTCH VACUUM VENT VALVE SWITCH -F36-, CHECKING .

DIAGNOSTIC TROUBLE CODE P0704

SAE-DTCDTC textCorrective action
P1176Bank 1, oxygen sensor correction behind catalytic converter Control limit reachedCheck Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC). See HEATED OXYGEN SENSOR (HO2S) -G39- AND OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER, CHECKING . Check Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC). See OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING . Check intake air system for leaks (false air). See INTAKE SYSTEM, CHECKING FOR LEAKS (FALSE AIR) .

DIAGNOSTIC TROUBLE CODE P1176

Additional emission regulations

SAE-DTCDTC textCorrective action
P1296Malfunction in cooling systemCheck Engine Coolant Temperature (ECT) Sensor -G62-. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR -G62-, CHECKING . Check coolant regulator: See

DIAGNOSTIC TROUBLE CODE P1296

SAE-DTCDTC textCorrective action
P2101Throttle Actuator Control Motor Circuit Range/PerformanceCheck Throttle Valve Control Module -J338-. See THROTTLE VALVE CONTROL MODULE -J338-, CHECKING .
P2122Throttle/Pedal Position Sensor/Switch "D" Circuit Low InputCheck Throttle Position (TP) sensor. See THROTTLE POSITION (TP) SENSOR, CHECKING .
P2123Throttle/Pedal Position Sensor/Switch "D" Circuit High Input
P2127Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input
P2128Throttle/Pedal Position Sensor/Switch "E" Circuit High Input
P2138Throttle/Pedal Position Sensor/Switch "D" / "E" Voltage Correlation

DIAGNOSTIC TROUBLE CODE P2101-P2138

SAE-DTCDTC textCorrective action
P2400Evaporative Emission System Leak Detection Pump Control Circuit/OpenCheck Leak detection pump (LDP) -V144-. See LEAK DETECTION PUMP (LDP) -V144-, CHECKING . EVAP canister system, check for proper seal. See EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL .
P2401Evaporative Emission System Leak Detection Pump Control Circuit Low
P2402Evaporative Emission System Leak Detection Pump Control Circuit High
P2403Evaporative Emission System Leak Detection Pump Sense Circuit/Open
P2404Evaporative Emission System Leak Detection Pump Sense Circuit Range/PerformanceCheck vacuum hose setup from engine compartment to leak detection pump for proper seal

DIAGNOSTIC TROUBLE CODE P2400-P2404

See also:
• TERMINAL RESISTANCE FOR CAN-BUS, CHECKING
• OXYGEN SENSORS, REMOVING AND INSTALLING
• OXYGEN SENSORS AND OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER, CHECKING
• OXYGEN SENSOR (O2S) HEATER 1 -Z29- BEHIND CATALYTIC CONVERTER, CHECKING
• SYSTEM PRESSURE AND RESIDUAL PRESSURE, CHECKING
• CHECKING EVAPORATIVE EMISSION (EVAP) CANISTER PURGE REGULATOR VALVE -N80
• INTAKE SYSTEM, CHECKING FOR LEAKS (FALSE AIR)
• EXHAUST SYSTEM, CHECKING FOR LEAKS
• SECONDARY AIR INJECTION (AIR) SYSTEM, CHECKING FOR PROPER SEAL
• SAFETY PRECAUTIONS
• EVAP CANISTER SYSTEM, CHECKING FOR PROPER SEAL
• THROTTLE VALVE CONTROL MODULE -J338-, CHECKING
• FUEL PUMP (FP) RELAY -J17- AND ACTIVATION, CHECKING
• IGNITION COILS WITH POWER OUTPUT STAGES, CHECKING
• ENGINE SPEED (RPM) SENSOR -G28-, CHECKING
• CHECK KNOCK SENSORS
• CAMSHAFT POSITION (CMP) SENSOR -G40-, CHECKING
• ENCODING II ENGINE CONTROL MODULE (ECM)
• CHECK MOTRONIC ENGINE CONTROL MODULE (ECM) POWER SUPPLY RELAY -J271- AND ACTIVATION
• CLUTCH VACUUM VENT VALVE SWITCH -F36-, CHECKING
• MODE 3: CHECK DTC MEMORY
• DIAGNOSTIC TROUBLE CODE (DTC) TABLES
• MALFUNCTION INDICATOR LAMP (MIL) -K83- IN INSTRUMENT CLUSTER
• ELECTRONIC POWER CONTROL (EPC) WARNING LAMP -K132- IN INSTRUMENT CLUSTER
• MODE 4: RESET/ERASE DIAGNOSTIC DATA
• MODE 9: VEHICLE INFORMATION
• Safety precautions
• SELECT DIAGNOSTIC MODE
• MODE 1: CHECK MEASURED VALUES
• MODE 2: CHECKING OPERATING CONDITIONS
• MODE 5: CHECK OXYGEN SENSOR OUTPUT SIGNALS
• MODE 6: CHECK TEST RESULTS OF COMPONENTS THAT ARE NOT CONTINUOUSLY MONITORED
• MODE 7: CHECK TEST RESULTS OF COMPONENTS THAT ARE CONTINUOUSLY MONITORED
• MODE 8: TANK LEAK TEST
• EVALUATION TEST-ID 01: RICH TO LEAN SENSOR BARRIER VOLTAGE
• Evaluation test-ID 02: Lean to rich sensor barrier voltage
• Evaluation test-ID 07: Minimum voltage at sensor for test cycle
• EVALUATION TEST-ID 08: MAXIMUM VOLTAGE AT SENSOR FOR TEST CYCLE
• EVALUATION TEST-ID 129: CURRENT VALUE OF OXYGEN SENSOR SIGNAL
• EVALUATION TEST-ID 130: SPECIFIED VALUE OF OXYGEN SENSOR SIGNAL
• Evaluation test-ID 131: Dynamic value
• EVALUATION TEST-ID 132: SHIFT OF OXYGEN SENSOR REGULATION BEFORE CATALYTIC CONVERTER VIA OXYGEN SENSOR REGULATION BEHIND CATALYTIC CONVERTER

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