Engine Controls - Self-Diagnostics - 4.0L: Other Oldsmobile Aurora II

Code Types

Diagnostic Trouble Codes (DTC) are categorized by type. The DTC type relates to how the Malfunction Indicator Light (MIL) operates and how the fault data is stored when a particular DTC fails. In some cases there may be exceptions to this structure. The following list describes the general characteristics of the 3 different types of DTC categories

1. Type "A" This type DTC is an emission related DTC. The PCM will illuminate the MIL the first time a failure occurs and will store a DTC in memory. The PCM will capture freeze frame/failure records data.
2. Type "B" This type DTC is an emissions related DTC. The first time a failure occurs, the PCM will not illuminate the MIL. The PCM will store a DTC in memory (as last test failed). The PCM will capture freeze frame/failure records data. If the failure occurs a second time within 2 consecutive drive cycles, the PCM will illuminate the MIL. The PCM will store the DTC in memory (DTC will now appear in history) and capture freeze frame/failure records data. If the failure occurs a second time but not within 2 consecutive drive cycles, the PCM will not illuminate the MIL. PCM will store the DTC in memory (as failed last test) and update failure records data only.
3. Type "C" This type DTC is a non-emissions related DTC. The PCM will not illuminate the MIL. The PCM will store the DTC in memory and capture failure records data. Some DTCs may also illuminate an auxiliary service light, and/or cause a message to be displayed on the driver information center depending on how the vehicle is equipped. The light/message request occurs at the time of the first failure.

Freeze Frame

Government regulations require that engine operating conditions be captured whenever the Malfunction Indicator Light (MIL) is illuminated. The data captured is called freeze frame data. The freeze frame data is very similar to a single record of operating conditions. Whenever the MIL is illuminated, the corresponding record of operating conditions is recorded as freeze frame data. A subsequent failure will not update the recorded information. Freeze frame data can only be overwritten with data associated with a misfire or fuel trim malfunction. Data from these faults take precedence over data associated with any other fault. The freeze frame data will not be erased unless the associated history DTC is cleared. The freeze frame data parameters stored with a DTC failure include the following.

1. Air/Fuel Ratio
2. Mass Airflow Sensor
3. Fuel Trim (Both Short Term And Long Term For Both Cylinder Banks)
4. Engine Speed
5. Intake Air Temperature
6. Engine Coolant Temperature
7. Vehicle Speed
8. Throttle Position Angle
9. Manifold Absolute Pressure/Barometric Pressure
10. Fuel System Status

Failure Records

When a diagnostic test fails, the Powertrain Control Module (PCM) stores the information as failure records data. Unlike freeze frame data, failure records are stored for multiple Diagnostic Trouble Codes (DTC) or non-emission related DTCs (DTCs that do not illuminate the MIL). The failure records information is updated the first time the test fails during each ignition cycle. Freeze frame/failure records data may be retrieved by using a scan tool. If more than one DTC is set, review the odometer or engine run time data located in the freeze frame/failure records info to determine the most current failure. The stored information will look like normal PCM data. Always capture freeze frame/failure records data information with the scan tool before proceeding with any diagnosis. Loss of this data may prevent accurate diagnosis of an intermittent condition.

POWERTRAIN CONTROL MODULE

After replacing Powertrain Control Module (PCM) or if program needs to be updated, refer to latest Techline information on PCM reprogramming. PCM can only be programmed using Tech 2 and Techline terminal, or by using a personal computer equipped with the current service programming system software installed. After reprogramming, perform INSPECTION/MAINTENANCE PROCEDURES , CRANKSHAFT POSITION SENSOR SYSTEM VARIATION LEARN PROCEDURE , OIL LIFE INDEX RESET , IDLE LEARN PROCEDURE and PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS .

CRANKSHAFT POSITION SENSOR SYSTEM VARIATION LEARN PROCEDURE

Battery must be fully charged and in good condition. Scan tool connection at Data Link Connector (DLC) should be clean and tight before starting crankshaft position system variation learn procedure.

1. Close hood. Block drive wheels and set vehicle parking brake. Turn all accessories off. Start engine. Ensure engine is at least 158°F (70°C). Turn ignition off. Using scan tool, select and enable CRANKSHAFT POSITION SYSTEM VARIATION LEARN PROCEDURE. Start engine.
2. Ensure transaxle is Park. Press and hold brake pedal firmly. Increase engine speed until fuel cutoff is reached at 5150 RPM. Immediately release accelerator pedal after fuel cutoff is reached. The crankshaft position system variation compensating values are learned when the RPM decreases back to idle. Monitor status for DTC P1336.
3. If scan tool indicates DTC P1336 ran and passed, crankshaft position system variation learn procedure is complete. If scan tool indicates DTC P1336 failed or did not run, check for additional DTCs and repair as necessary. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000) . If only DTC P1336 is set, repeat crankshaft position system variation learn procedure as necessary.

IDLE LEARN PROCEDURE

Note. When Powertrain Control Module (PCM) or battery is disconnected, PCM loses power, or PCM is reprogrammed, PCM learned idle position is lost. When learned idle position is lost, engine idle will be unstable.

Start engine and allow it to idle for 15 seconds. Turn ignition off. Wait 15 seconds. Restart engine and check for proper idle operation.

PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS

If replacing a Powertrain Control Module (PCM) with a replacement part, after programming, these modules will learn incoming fuel continue password immediately upon receipt of a password message. Once a password message is received and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn current vehicle's password.

1. Turn ignition on. Attempt to start engine, then release key to ON position (vehicle will not start). Observe SECURITY indicator. After about 10 minutes, SECURITY indicator will turn off. Turn ignition off and wait 5 seconds.
2. Repeat step 1 2 more times for a total of 3 cycles in 30 minutes. Vehicle is now ready to relearn key transponder information and/or passwords on next ignition switch transition from OFF to CRANK position.
3. Start engine. Vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password. Using scan tool, clear any DTCs if needed.

DRIVE CYCLES

For drive cycle procedure, see INSPECTION/MAINTENANCE SYSTEM CHECK .

Conditions For Updating I/M System Status

Each system requires at least one, and sometimes several, diagnostic tests. The results of these tests are reported by a Diagnostic Trouble Code (DTC). A system monitor is complete when either all of the DTCs comprising the monitor have run and passed, or when any one of the DTCs comprising the monitor have illuminated the Malfunction Indicator Light (MIL). Once all of the tests are completed, the I/M system status display will indicate YES in the completed column. For example, when the HO2S heater test indicates YES, all 3 of the oxygen sensor heaters and circuits have been diagnosed. The I/M system status will indicate NO under the completed column when any of the required tests for that system have not run. The following is a list of conditions that will set the I/M system status indicator to NO

1. Vehicle is new from the factory and has not yet been driven through the necessary drive conditions in order to complete the tests.
2. Battery has been disconnected or discharged to less than operating voltage.
3. The PCM power or ground has been interrupted.
4. The PCM has been reprogrammed.
5. PCM DTCs have been cleared as part of a service procedure.

Enable Criteria

Ensure vehicle meets the following conditions before performing procedure

1. Barometric pressure is more than 10.4 psi (72 kPa).
2. Engine coolant temperature is 41-248°F (5-120°C).
3. Intake air temperature is 21-392°F (-6 to 200°C).
4. Battery voltage is 9-18 volts.
5. Fuel level is 1/4-3/4 full.

The following conditions are for running a passive test (engine in open loop).

1. Start-up coolant temperature is 41-176°F (5-80°C).
2. Engine coolant temperature is 41-226°F (5-108°C).
3. Intake air temperature is 41-163°F (5-73°C).
4. Mass airflow is less than 35 grams/sec.
5. Air/fuel ratio is more than 12.1:1.
6. Manifold absolute pressure is more than 7.3 psi (50 kPa).
7. Battery voltage is more than 10.2 volts.

The following conditions are for running an active test (engine in closed loop).

1. A failed or inconclusive passive test.
2. Engine load is less than 80 percent.
3. Engine speed is more than 1000 RPM.
4. Engine is operating is closed loop fuel control.

1. Barometric pressure is more than 10.5 psi (72 kPa).
2. Engine coolant temperature is 203-212°F (95-100°C), normal operating temperature.
3. Intake air temperature is 21-392°F (-6 to 200°C).
4. Engine is in closed loop.
5. Engine has run for 10 minutes off idle in order to initiate a test.
6. Battery voltage is 10-16 volts.

1. Barometric pressure is more than 10 psi (70 kPa).
2. Engine coolant temperature is 176-230°F (80-110°C).
3. Intake air temperature is less than 122°F (50°C).
4. Idle speed is steady.
5. Battery voltage is 11-18 volts.
6. Transmission state is steady.
7. Vehicle speed is greater than 23 MPH.
8. A/C state is steady.

1. Barometric pressure is more than 10.5 psi (72 kPa).
2. Engine coolant temperature is less than 122°F (50°C).
3. Fuel level is 1/4-3/4 full.
4. Battery voltage is 10-16 volts.

1. Engine coolant temperature is more than 176°F (80°C).
2. Engine is in closed loop.
3. Engine has been running more than 4 minutes.
4. Battery voltage is 11.6-16.0 volts.

The following enable criteria is for HO2S bank 1 sensor 1, and bank 2 sensor 1.

1. Engine speed is 500-3000 RPM.
2. Engine run time is less than 3 minutes.
3. Mass airflow is 4-30 grams/sec.
4. Battery voltage is 9-18 volts.

The following enable criteria is for HO2S bank 1 sensor 2.

1. Engine cold start is determined.
2. Average mass airflow during warm-up is less than 30 grams/sec.
3. Battery voltage is 10-18 volts.

SUMMARY

If no Diagnostic Trouble Codes (DTC) are present and a no-start condition exists, diagnose no-start condition. See appropriate BASIC DIAGNOSTIC PROCEDURES article. If no DTCs are present and a driveability condition exists, proceed to appropriate TROUBLE SHOOTING - NO CODES article for diagnosis by symptom (i.e., ROUGH IDLE, ENGINE STALLS, etc.).

MALFUNCTION INDICATOR LIGHT INOPERATIVE

1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to «POWERTRAIN DIAGNOSTIC SYSTEM CHECK»(ref-121492-S39227106492001082900000) under DIAGNOSTIC SYSTEM CHECKS.
2. Turn ignition off. Remove and inspect fuse No. 12 (IGN 1 fuse) from rear fuse block. Rear fuse block is located underneath driver's side rear seat. If fuse is okay, reinstall fuse and go to next step. If fuse is blown, go to step 10.
3. Ensure ignition is off. Disconnect Powertrain Control Module (PCM) connectors. PCM is located in engine compartment, inside air filter housing. Turn ignition on. Connect a 3-amp fused jumper wire between ground and terminal No. 32 (Brown/White wire) at PCM C1 harness connector. (Scheme 13) Observe Malfunction Indicator Light (MIL). If MIL does not illuminate, go to next step. If MIL illuminates, go to step 9.
4. Check condition of fused jumper wire. If fused jumper wire is blown, go to step 11. If fused jumper wire is not blown, go to next step.
5. Turn ignition off. Remove Instrument Panel Cluster (IPC). See REMOVAL & INSTALLATION in appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Check continuity of Brown/White wire between terminal B1 at IPC C2 harness connector and terminal No. 32 at PCM C1 harness connector. (Scheme 13)and (Scheme 14). If continuity exists, go to next step. If continuity does not exist, repair open in Brown/White wire. After repairs, go to step 14.
6. Using a test light connected to ground, probe terminal B4 (Pink wire) at IPC C2 harness connector. Turn ignition on. If test light does not illuminate, go to next step. If test light illuminates, go to step 8.
7. Repair open in Pink wire between IPC and rear fuse block. After repairs, go to step 14.
8. Check for faulty connections at IPC connector. Repair connector as necessary. After repairs, go to step 14. If connector is okay, go to step 12.
9. Check for faulty connections at PCM connectors. Repair connectors as necessary. After repairs, go to step 14. If connectors are okay, go to step 13.
10. Repair short to ground in Pink wire between IPC and rear fuse block. Replace fuse. After repairs, go to step 14.
11. Repair short to voltage in Brown/White wire between terminal B1 at IPC C2 harness connector and terminal No. 32 at PCM C1 harness connector. After repairs, go to step 14.
12. Replace IPC. After repairs, go to step 14.
13. Replace PCM. Program replacement PCM. See «PROGRAMMING»(ref-121492-S36116474272001082900000). After repairs, go to next step.
14. Recheck operation of MIL. If MIL operates properly, repair is complete. If MIL does not operate properly, go to step 2.

Scheme 13

Scheme 14

MALFUNCTION INDICATOR LIGHT ALWAYS ON

1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to «POWERTRAIN DIAGNOSTIC SYSTEM CHECK»(ref-121492-S39227106492001082900000) under DIAGNOSTIC SYSTEM CHECKS.
2. Turn ignition off. Disconnect Powertrain Control Module connectors. PCM is located in engine compartment, inside air filter housing. Turn ignition on. If MIL illuminates, go to next step. If MIL does not illuminate, go to step 5.
3. Turn ignition off. Remove Instrument Panel Cluster (IPC). See REMOVAL & INSTALLATION in appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Using a test light connect to positive battery voltage, probe terminal B1 (Brown/White wire) at IPC C2 harness connector. (Scheme 14) If test light does not illuminate, go to step 6. If test light illuminates, repair short to ground in Brown/White wire. After repairs, go to step 6.
4. Replace IPC. After repairs, go to step 6.
5. Replace PCM. Program replacement PCM. See «PROGRAMMING»(ref-121492-S36116474272001082900000). After repairs, go to next step.
6. Recheck operation on MIL. If MIL operates properly, repair is complete. If MIL does not operate properly, go to step 2.

Code Enable Criteria

1. System voltage is 9-18 volts.
2. Ignition is on.

1. System voltage is 9-18 volts.
2. Ignition is on.

Note. Intake Air Temperature (IAT) sensor is integral to MAF sensor. MAF sensor may also be referred to as MAF/IAT sensor.

1. DTC P0102, P0103, P0106, P0107, P0108, P0121, P0122, P0123, P0401, P1122 or P1441 is not set.
2. Engine is running.
3. Ignition 1 signal is 11-18 volts.
4. Throttle Position (TP) sensor angle is less than 47.9 percent.
5. TP sensor is steady within a range of less than 2.9 percent.
6. Manifold Absolute (MAP) sensor signal is steady and less than 8.48 psi (58.5 kPa).
7. Exhaust Gas Recirculation (EGR) position sensor signal is less than 90 percent.
8. Evaporative Emission (EVAP) purge solenoid command is less than 90 percent.
9. Traction control status is inactive.
10. All listed conditions are stable for at least 10 seconds.

Scheme 15

1. If powertrain diagnostic system check has already been performed, go to next step. If powertrain diagnostic system check has not been performed, go to «POWERTRAIN DIAGNOSTIC SYSTEM CHECK»(ref-121492-S39227106492001082900000) under DIAGNOSTIC SYSTEM CHECKS.
2. Start engine. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, go to next step. If any other DTCs are set, repair DTCs as necessary. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000).
3. Using scan tool, observe and record FREEZE FRAME/FAILURE RECORDS data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria, or as close to recorded FREEZE FRAME/FAILURE RECORDS data as possible. If DTC resets, go to next step. If DTC does not reset, see «DIAGNOSTIC AIDS»(ref-121492-S23937344232001090400000).
4. Ensure engine is idling. Using scan tool, observe MAP sensor voltage parameter. If voltage is.8-4.0 volts, go to next step. If voltage is not.8-4.0 volts, go to «DTC P0106: MANIFOLD ABSOLUTE PRESSURE SYSTEM PERFORMANCE»(ref-121492-S19811092232001082900000).
5. Turn ignition off. Check for objects blocking MAF/IAT sensor air inlet screen. Check for plugged or collapsed intake air duct or dirty air filter element. Check for vacuum leaks in the following components. Air Induction System And Resonator Throttle Body And Gasket Intake Manifold EGR Valve Flange And Pipe MAF/IAT Sensor MAP Sensor EVAP Canister Purge Valve Seal Crankcase Ventilation System Brake Booster If any problems are found, repair as necessary. After repairs, go to step 23. If no problems are found, go to next step.
6. Turn ignition off. Remove MAP sensor vacuum source. (Scheme 15) Leave MAP sensor electrical connector connected. Connect a hand operated vacuum pump to MAP sensor vacuum port. Turn ignition on. Using scan tool, observe MAP sensor parameter while slowly applying vacuum one in. Hg at a time. Apply up to 20 in. Hg. Each one in. Hg of vacuum applied should result in a.4-.6 psi (3-4 kPa) drop in MAP sensor value indicated on scan tool. MAP sensor value should change smoothly with each one in. Hg increase. If MAP sensor value changed smoothly through entire range of test, go to next step. If MAP sensor value did not change smoothly through entire range of test, go to «DTC P0106: MANIFOLD ABSOLUTE PRESSURE SYSTEM PERFORMANCE»(ref-121492-S19811092232001082900000).
7. Observe scan tool and apply 20 in. Hg vacuum to MAP sensor. If scan tool indicates MAP sensor reading is 4.9 psi (34 kPa) or less, go to next step. If scan tool indicates MAP sensor reading is more than 4.9 psi (34 kPa), go to «DTC P0106: MANIFOLD ABSOLUTE PRESSURE SYSTEM PERFORMANCE»(ref-121492-S19811092232001082900000).
8. Observe scan tool and disconnect vacuum pump from MAP sensor. If MAP sensor reading returns to original value that was observed in step 6, go to next step. If MAP sensor reading does not return to original value, go to «DTC P0106: MANIFOLD ABSOLUTE PRESSURE SYSTEM PERFORMANCE»(ref-121492-S19811092232001082900000).
9. Using scan tool, observe TP sensor angle parameter from closed throttle to wide open throttle. If TP sensor value changed from zero to 100 percent smoothly, go to next step. If TP sensor value did not change from zero to 100 percent or did not change smoothly, go to «DTC P0121: THROTTLE POSITION SENSOR CIRCUIT INSUFFICIENT ACTIVITY»(ref-121492-S07550945922001082900000).
10. Turn ignition off. Disconnect MAF/IAT sensor connector. Turn ignition on. Measure voltage between ground and terminal "E" (Yellow wire) at MAF/IAT sensor harness connector. see scheme 6 If voltage is about 5 volts, go to next step. If voltage is not about 5 volts, go to step 12.
11. Using a test light connected to ground, probe terminal "D" (Pink/White wire) at MAF/IAT sensor harness connector. If test light illuminates, go to step 19. If test light does not illuminate, go to step 14.
12. If voltage measured in step 10 is less than 4.5 volts, go to step 15. If voltage measured in step 10 is not less than 4.5 volts, go to next step.
13. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Turn ignition on. Measure voltage between ground and terminal "E" (Yellow wire) at MAF/IAT sensor harness connector. If voltage is zero volts, go to step 22. If voltage is not zero volts, go to step 18.
14. Using a test light connected to ground, probe terminal "D" (Pink/White wire) at MAF/IAT sensor harness connector. If test light illuminates, go to step 16. If test light does not illuminate, go to step 17.
15. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Check for an open or short to ground in Yellow wire between terminal "E" at MAF/IAT sensor harness connector and terminal No. 42 at PCM C1 harness connector. (Scheme 13)and see scheme 6. Also check if Yellow wire at terminal "E" is shorted to Black/White wire at terminal "C" at MAF/IAT sensor harness connector. If Yellow wire is open, shorted to ground, or shorted to Black/White wire, repair wiring as necessary. After repairs, go to step 23. If wiring is okay, go to step 20.
16. Repair open or high resistance in Black/White wire between ground and terminal "C" at MAF/IAT sensor. See WIRING DIAGRAMS article. After repairs, go to step 23.
17. Repair short to ground or open in Pink/White wire between underhood fuse block and terminal "D" at MAF/IAT sensor. Also check fuse No. 11 (IGN 1 fuse) in underhood fuse block. Replace fuse as necessary. After repairs, go to step 23.
18. Repair short to voltage in Yellow wire between PCM and MAF/IAT sensor. After repairs, go to step 23.
19. Check for poor connections at MAF/IAT sensor connector. Repair connector as necessary. After repairs, go to step 23. If connector is okay, go to step 21.
20. Check for poor connections at PCM connectors. Repair connectors as necessary. After repairs, go to step 23. If connectors are okay, go to step 22.
21. Replace MAF/IAT sensor. After repairs, go to step 23.
22. Replace PCM. Program replacement PCM. See «PROGRAMMING»(ref-121492-S36116474272001082900000). After repairs, go to next step.
23. Turn ignition off. Reconnect all disconnected connectors. Turn ignition on. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria. If DTC runs and passes, go to next step. If DTC resets, go to step 2.
24. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, test is complete. If any other DTCs are set, repair DTCs as necessary. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000).

Note. Intake Air Temperature (IAT) sensor is integral to MAF sensor. MAF sensor may also be referred to as MAF/IAT sensor.

1. Engine run time is more than 8 seconds.
2. Engine speed is more than 250 RPM.
3. Ignition 1 signal is 10.5 volts or more.

Note. Intake Air Temperature (IAT) sensor is integral to MAF sensor. MAF sensor may also be referred to as MAF/IAT sensor.

1. Engine run time is more than 8 seconds.
2. Engine speed is more than 250 RPM.
3. Ignition 1 signal is 10.5 volts or more.

1. DTC P0121, P0122, or P0123 is not set.
2. Engine speed variation is less than 125 RPM.
3. Any change in idle air control position is less than 15 counts.
4. Engine speed is 1000-4000 RPM.
5. Throttle position sensor variation is less than 4 percent.
6. Any change in EGR position is less than 10 grams/sec.
7. Torque converter clutch is unchanged for 3 seconds.
8. Brake switch is off for 3 seconds.
9. A/C clutch state is unchanged for 2 seconds.
10. Traction control is not active.
11. Engine overtemp protection is not active.

1. DTC P0121, P0122 or P0123 is not set.
2. Throttle Position (TP) sensor is more than 9 percent when engine speed is more than 1000 RPM.
3. TP sensor is more than zero percent when engine speed is less than 1000 RPM.

1. DTC P0121, P0122 or P0123 is not set.
2. Throttle angle is less than 98 percent when engine speed is more than 1000 RPM.
3. Throttle angle is less than 90 percent when engine speed is less than 1000 RPM.

Note. IAT sensor is integral to Mass Airflow (MAF) sensor. IAT sensor may also be referred to as MAF/IAT sensor.

1. DTC P0117, P0118, P0125, P0502, P0503, P1114 or P1115 is not set.
2. Engine run time is more than 10 seconds.
3. Engine coolant temperature is less than 212°F (100°C).
4. Vehicle speed is more than 9 MPH.

Note. IAT sensor is integral to Mass Airflow (MAF) sensor. IAT sensor may also be referred to as MAF/IAT sensor.

1. DTC P0101, P0102, P0103, P0117, P0118, P0125, P0502, P0503, P1114 or P1115 is not set.
2. Engine run time is more than 320 seconds.
3. Engine speed is more than 50 RPM for 5 seconds.
4. Engine coolant temperature is more than 32°F (0°C).
5. Vehicle speed is less than 48 MPH.

1. DTC P0112, P0113, P1111 or P1112 is not set.
2. Engine run time is more than 10 seconds.
3. Intake air temperature is less than 158°F (70°C).

1. DTC P0112, P0113, P1111 or P1112 is not set.
2. Engine run time has been more than 60 seconds.
3. Intake air temperature is more than 19°F (-7°C).

1. DTC P0106, P0107, P0108, P0122, P0123, P0506, P0507, P1106, P1107, P1121 or P1122 is not set.
2. Engine run time is more than 30 seconds.
3. Engine coolant temperature is more than 32°F (0°C).
4. MAP reading is less than 8 psi (55 kPa) for a TP sensor skewed high test.
5. MAP reading is more than 9.28 psi (64 kPa) for a TP sensor skewed low test.
6. MAP is steady for 5 seconds or more.

Only condition for running this DTC is ignition must be on.

Only condition for running this DTC is ignition must be on.

1. DTC P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0502, P0503, P1111, P1112, P1114 or P1115 is not set.
2. Engine is running.
3. Engine coolant temperature at start-up is 104°F (40°C).
4. Engine coolant temperature is more than -40°F (-40°C).
5. Intake air temperature is -40 to 104°F (-40 to 40°C).
6. Vehicle speed is more than one MPH.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0151, P0152, P0153, P0154, P0201-P0208, P1133, P1134, P1153 or P1154 is not set.
2. Engine is running.
3. System voltage is 9-18 volts.
4. Engine coolant temperature at start-up is less than 104°F (40°C).
5. Engine coolant temperature is more than -40°F (-40°C).
6. Intake air temperature is -40 to 104°F (-40 to 40°C).
7. Vehicle speed is more than one MPH.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. Throttle position angle is 3-25 percent.
3. System voltage is 9-18 volts.
4. Closed loop fuel control enabled.
5. Air/fuel ratio is 14.5-14.8.
6. EGR flow diagnostic test is not active.
7. Fuel injectors are not disabled.
8. AIR diagnostic test is not active.
9. Catalyst diagnostic test is not active.
10. Listed conditions are met for 3 seconds.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. Throttle position angle is 3-25 percent.
3. System voltage is 9-18 volts.
4. Closed loop fuel control enabled.
5. Air/fuel ratio is 14.4-14.9.
6. Fuel injectors are not disabled.
7. EGR flow diagnostic test is not active.
8. AIR diagnostic test is not active.
9. Catalyst diagnostic test is not active.
10. Listed conditions are met for 3 seconds.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0135, P0151, P0152, P0201-P0208, P0300, P0410, P0440, P0442, P0443, P0446, P0449, P1133, P1415, P1416 or P1441 is not set.
2. Engine speed is 1200-2800 RPM.
3. Throttle position angle is more than 3 percent.
4. Mass airflow is 15-35 grams/sec.
5. System voltage is 9-18 volts.
6. Closed loop fuel control enabled.
7. Engine coolant temperature is more than 167°F (75°C).
8. Transmission is not in Park, Reverse or Neutral.
9. Engine run time is 3 minutes.
10. EGR flow diagnostic test is not active.
11. AIR diagnostic test is not active.
12. Catalyst diagnostic test is not active.
13. Listed conditions are met for 3 seconds.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. System voltage is 9-18 volts.
3. Engine run time is 3 minutes.
4. EGR flow diagnostic test is not active.
5. Catalyst diagnostic test is not active.
6. AIR diagnostic test is not active.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0030, P1031 or P1032 is not set.
2. System voltage during current measurement is steady within one volt of actual system voltage.
3. Engine speed is 500-3000 RPM.
4. Engine run time is more than 5 minutes.
5. HO2S overtemp control is not active.
6. Mass airflow is 4-30 grams/sec.
7. Listed conditions are met for 3 seconds.

Note. HO2S bank 1 sensor 2 is located behind catalytic converter.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. Throttle position angle is 3-25 percent.
3. System voltage is 9-18 volts.
4. Closed loop fuel control enabled.
5. Air/fuel ratio is 14.5-14.8.
6. EGR flow diagnostic test is not active.
7. Fuel injectors are not disabled.
8. AIR diagnostic test is not active.
9. Catalyst diagnostic test is not active.
10. Listed conditions are met for 3 seconds.

Note. HO2S bank 1 sensor 2 is behind catalytic converter.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. Throttle position angle is between 3-25 percent.
3. System voltage is 9-18 volts.
4. Closed loop fuel control enabled.
5. Air/fuel ratio is 14.4-14.9.
6. EGR flow diagnostic test is not active.
7. AIR diagnostic test is not active.
8. Catalyst diagnostic test is not active.
9. Listed conditions are met for 3 seconds.

Note. Post catalytic HO2S is also referred to as HO2S bank 1 sensor 2. HO2S bank 1 sensor is behind catalytic converter.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0141, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. System voltage is 9-18 volts.
3. Engine run time is 3 minutes.
4. EGR flow diagnostic test is not active.
5. AIR diagnostic test is not active.

Note. HO2S bank 1 sensor 2 is located behind catalytic converter.

1. DTC P0137, P0138 or P0140 is not set.
2. Difference between ECT at last key off and current key on indicates a cold start.
3. System voltage is 10-18 volts.
4. Average mass airflow is less than 30 grams/sec.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0151, P0152, P0153, P0154, P0201-P0208, P1133, P1134, P1153 or P1154 is not set.
2. Engine run time is 120 seconds.
3. Engine coolant temperature is more than 167°F (75°C).
4. System voltage is 9-18 volts.
5. Predicted HO2S heater temperature is 1112°F (600°C).
6. Traction control is inactive.
7. Catalyst protection mode is inactive.
8. Engine speed is 500-5000 RPM.
9. Mass airflow is 3-30 grams/sec.
10. Deceleration fuel cutoff is inactive.
11. Power enrichment is inactive.
12. Listed conditions are met for 5 seconds.
13. Closed loop fuel control is enabled.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. Throttle position angle is 3-25 percent.
3. System voltage is 9-18 volts.
4. Closed loop fuel control enabled.
5. Air/fuel ratio is 14.5-14.8.
6. EGR flow diagnostic test is not active.
7. Fuel injectors are not disabled.
8. AIR diagnostic test is not active.
9. Catalyst diagnostic test is not active.
10. Listed conditions are met for 3 seconds.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. Throttle position angle is between 3-25 percent.
3. System voltage is 9-18 volts.
4. Closed loop fuel control enabled.
5. Air/fuel ratio is 14.4-14.9.
6. Fuel injectors are not disabled.
7. EGR flow diagnostic test is not active.
8. AIR diagnostic test is not active.
9. Catalyst diagnostic test is not active.
10. Listed conditions are met for 3 seconds.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0135, P0151, P0152, P0201-P0208, P0300, P0410, P0440, P0442, P0443, P0446, P0449, P1133, P1415, P1416 or P1441 is not set.
2. Engine speed is 1200-2800 RPM.
3. Throttle position angle is more than 3 percent.
4. Mass airflow is 15-35 grams/sec.
5. System voltage is 9-18 volts.
6. Closed loop fuel control enabled.
7. Engine coolant temperature is more than 167°F (75°C).
8. Transmission is not in Park, Reverse or Neutral.
9. Engine run time is 3 minutes.
10. EGR flow diagnostic test is not active.
11. AIR diagnostic test is not active.
12. Catalyst diagnostic test is not active.
13. Listed conditions are met for 3 seconds.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. System voltage is 9-18 volts.
3. Engine run time is 3 minutes.
4. EGR flow diagnostic test is not active.
5. Catalyst diagnostic test is not active.
6. AIR diagnostic test is not active.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0030, P1031 or P1032 is not set.
2. System voltage during current measurement is steady within one volt of actual system voltage.
3. Engine speed is 500-3000 RPM.
4. Engine run time is more than 3 minutes.
5. Mass airflow is 4-30 grams/sec.
6. Listed conditions are met for 3 seconds.

1. DTC P0101, P0102, P0103, P0107, P0108, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0401, P0403, P0404, P0405, P0410, P0440, P0442, P0446, P0506, P0507, P1404 or P1441 is not set.
2. Coolant temperature is 68-239°F (20-115°C).
3. Intake air temperature is 68-212°F (20-100°C).
4. Manifold absolute pressure is 2.1-12.3 psi (15-85 kPa).
5. Vehicle speed is less than 82 MPH.
6. Engine speed is 500-4000 RPM.
7. Barometric pressure is more than 10.1 psi (75 kPa).
8. Mass airflow is 3-60 grams/sec.
9. Fuel level is more than 10 percent.

1. DTC P0101, P0102, P0103, P0107, P0108, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0401, P0403, P0404, P0405, P0410, P0440, P0442, P0446, P0506, P0507, P1404 or P1441 is not set.
2. Coolant temperature is 68-239°F (20-115°C).
3. Intake air temperature is 68-212°F (20-100°C).
4. Manifold absolute pressure is 2.1-12.3 psi (15-85 kPa).
5. Vehicle speed is less than 82 MPH.
6. Engine speed is 500-4000 RPM.
7. Barometric pressure is more than 10.1 psi (75 kPa).
8. Mass airflow is 3-60 grams/sec.
9. Fuel level is more than 10 percent.

1. DTC P0101, P0102, P0103, P0107, P0108, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0401, P0403, P0404, P0405, P0410, P0440, P0442, P0446, P0506, P0507, P1404 or P1441 is not set.
2. Coolant temperature is 68-239°F (20-115°C).
3. Intake air temperature is 68-212°F (20-100°C).
4. Manifold absolute pressure is 2.1-12.3 psi (15-85 kPa).
5. Vehicle speed is less than 82 MPH.
6. Engine speed is 500-4000 RPM.
7. Barometric pressure is more than 10.1 psi (75 kPa).
8. Mass airflow is 3-60 grams/sec.
9. Fuel level is more than 10 percent.

1. DTC P0101, P0102, P0103, P0107, P0108, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0401, P0403, P0404, P0405, P0410, P0440, P0442, P0446, P0506, P0507, P1404 or P1441 is not set.
2. Coolant temperature is 68-239°F (20-115°C).
3. Intake air temperature is 68-212°F (20-100°C).
4. Manifold absolute pressure is 2.1-12.3 psi (15-85 kPa).
5. Vehicle speed is less than 82 MPH.
6. Engine speed is 500-4000 RPM.
7. Barometric pressure is more than 10.1 psi (75 kPa).
8. Mass airflow is 3-60 grams/sec.
9. Fuel level is more than 10 percent.

1. Engine is running.
2. Ignition voltage is 11-16 volts.

1. Engine is running.
2. Ignition voltage is 8-16 volts.

1. DTC P0101, P0102, P0103, P0106, P0107, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0335, P0336, P0340, P0341, P0385, P0386, P0502, P0503, P0705, P0713, P1114, P1115, P1121, P1122, P1336 or P1372 is not set.
2. Engine speed is 500-5850 RPM.
3. Battery voltage is 9-18 volts.
4. Engine coolant temperature is 19-248°F (-7 to 120°C). If engine coolant temperature at start-up is less than 19°F (-70°C), test will be delayed until temperature is more than 70°F (21°C).
5. Throttle angle is steady.
6. A/C compressor clutch is steady.
7. EGR flow test is inactive.
8. Fuel level is more than 10 percent.
9. Torque management is not active.

1. Engine speed is more than 3000 RPM.
2. System voltage is more than 11 volts.

1. Engine speed is more than 600 RPM.
2. Knock detection is enabled.

1. Engine speed is more than 3000 RPM.
2. System voltage is more than 11 volts.

Only condition for running this DTC is engine must be cranking or running.

Scheme 16

Scheme 17

1. If powertrain diagnostic system check has already been performed, go to next step. If powertrain diagnostic system check has not been performed, go to «POWERTRAIN DIAGNOSTIC SYSTEM CHECK»(ref-121492-S39227106492001082900000) under DIAGNOSTIC SYSTEM CHECKS.
2. Attempt to start engine. Using scan tool, monitor DTC information. If DTC P0335, P0340 and P0385 are all set, go to step 11. If DTC P0335, P0340 and P0385 are all not set, go to next step. NOTE: If DTC P0386 is also set, continue with this test before diagnosing DTC P0386.
3. Start engine. Using scan tool, monitor CKP sensor status parameter. If scan tool indicates CKP sensor status as ANGLE, go to next step. If scan tool does not indicate CKP sensor status as ANGLE, turn ignition off and go to step 5.
4. Ensure engine is running. Observe scan tool and wiggle CKP sensor "A" wiring harness. (Scheme 16) If CKP sensor status changes or engine stalls, a fault exists in CKP sensor "A" wiring harness or connector. Repair as necessary. After repairs, go to step 21. If CKP sensor status does not change and engine does not stall, see «DIAGNOSTIC AIDS»(ref-121492-S16180521512001091900000).
5. Turn ignition on. Raise and support vehicle. Disconnect CKP sensor "A" connector. (Scheme 16) Using a test light connected to ground, probe terminal "A" (Light Green wire) at CKP sensor "A" harness connector. (Scheme 17) If test light illuminates, go to next step. If test light does not illuminate, go to step 8.
6. Connect test light between terminal "A" (Light Green wire) and terminal "B" (Yellow/Black wire) at CKP sensor "A" harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step 9.
7. Using scan tool, clear DTCs. Using scan tool, command PCM to operate in TIME A mode. Using a test light connected to positive battery voltage, repeatedly touch terminal "C" (Light Blue/White wire) at CKP sensor "A" harness connector. Observe 24X crank sensor data on scan tool. If scan tool indicates an RPM when touching Light Blue/White wire, go to step 15. If scan tool does not indicate an RPM when touching Light Blue/White wire, go to step 10.
8. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Check continuity of Light Green wire between terminal "A" at CKP sensor "A" harness connector and terminal No. 65 at PCM C2 harness connector. (Scheme 13)and (Scheme 17). If continuity exists, go to step 16. If continuity does not exist, repair open in Light Green wire. After repairs, go to step 21.
9. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Check continuity of Yellow/Black wire between terminal "B" at CKP sensor "A" harness connector and terminal No. 66 at PCM C2 harness connector. (Scheme 13)and (Scheme 17). If continuity exists, go to step 16. If continuity does not exist, repair open in Yellow/Black wire. After repairs, go to step 21.
10. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Turn ignition on. Check CKP sensor "A" signal circuit (Light Blue/White wire) as follows: Check for open or short to ground in Light Blue/White wire between terminal "C" at CKP sensor "A" harness connector and terminal No. 2 at PCM C1 harness connector. (Scheme 13)and (Scheme 17). Check for continuity between terminal "C" (Light Blue/White wire) and terminal "B" (Yellow/Black wire) at CKP sensor "A" harness connector. Continuity should not exist. If continuity exists, Light Blue/White and Yellow/Black wires are shorted together. Check for continuity between terminals No. 2 (Light Blue/White wire) and No. 14 (Yellow wire) at PCM C1 harness connector. Continuity should not exist. If continuity exists, Light Blue/White and Yellow wires are shorted together. Turn ignition on. Connect a test light between ground and terminal No. 2 (Light Blue/White wire) at PCM C1 harness connector. Test light should not illuminate. If test light illuminates, Light Blue/White wire is shorted to voltage. If any problems are found, repair as necessary. After repairs, go to step 21. If no problems are found, go to step 16.
11. Disconnect CMP sensor connector. CMP sensor is located in front of right (rear) cylinder head. Using scan tool, monitor 12-volt reference parameter. If scan tool displays OK, go to step 17. If scan tool does not display OK, go to next step.
12. Raise and support vehicle. Disconnect CKP sensor "A" connector. (Scheme 16) Using scan tool, monitor 12-volt reference parameter. If scan tool displays OK, go to step 18. If scan tool does not display OK, go to next step.
13. Raise and support vehicle. Disconnect CKP sensor "B" connector. (Scheme 16) Using scan tool, monitor 12-volt reference parameter. If scan tool displays OK, go to step 19. If scan tool does not display OK, go to next step.
14. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Ensure CKP sensor "A", CKP sensor "B" and CMP sensor are disconnected. Check 12-volt reference circuits for a short to ground as follows: Using a test light connected to battery voltage, probe terminal No. 65 (Light Green wire) at PCM C2 harness connector. (Scheme 13) Test light should not illuminate. If test light illuminates, Light Green wire is shorted to ground between PCM and CKP sensor "A". Using a test light connected to battery voltage, probe terminal No. 25 (Light Green wire) at PCM C2 harness connector. Test light should not illuminate. If test light illuminates, Light Green wire is shorted to ground between PCM and CKP sensor "B". Using a test light connected to battery voltage, probe terminal No. 58 (Red wire) at PCM C1 harness connector. Test light should not illuminate. If test light illuminates, Red wire is shorted to ground between PCM and CMP sensor. If any problems are found, repair as necessary. After repairs, go to step 21. If no problems are found, go to step 20.
15. Check for poor connections at CKP sensor "A" connector. Repair connector as necessary. After repairs, go to step 21. If connector is okay, go to step 18.
16. Check for poor connections at PCM connectors. Repair connectors as necessary. After repairs, go to step 21. If connectors are okay, go to step 20.
17. Replace CMP sensor. After repairs, go to step 10.
18. Replace CKP sensor "A". After repairs, go to step 21.
19. Replace CKP sensor "B". After repairs, go to step 21.
20. Replace PCM. Program replacement PCM. See «PROGRAMMING»(ref-121492-S36116474272001082900000). After repairs, go to next step.
21. Turn ignition off. Reconnect all disconnected connectors. Turn ignition on. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria. If DTC runs and passes, go to next step. If DTC resets, go to step 2.
22. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, test is complete. If any other DTCs are set, repair DTCs as necessary. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000).

1. Engine cranking or running.
2. DTC P0385 is set.
3. No cam faults are present.

Only condition for running this DTC is no CKP sensor DTCs set with engine speed more than 400 RPM.

Only condition for running this DTC is engine running at less than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine running at more than 2000 RPM.

Only condition for running this DTC is engine must be cranking or running.

1. Engine is cranking or running.
2. DTC P0335 is set.
3. No cam faults are present.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0201-P0208, P0300, P0335, P0336, P0385, P0386, P0405, P0449, P0502, P0503, P0506 or P0507 is not set.
2. System voltage is 11-18 volts.
3. A/C status does not change.
4. Transaxle range does not change.
5. Throttle position angle is less than 1.19 percent, deceleration.
6. Deceleration fuel cut-off is steady for .3 second.
7. Engine coolant temperature is 176-230°F (80-110°C).
8. Engine speed is 700-1200 RPM.
9. Idle air control valve position is consistently more than 8 counts.
10. Manifold Absolute Pressure (MAP) is steady at 2-10 psi (15-70 kPa).
11. Vehicle speed is more than 37 MPH.
12. Barometric pressure is more than 10 psi (70 kPa).
13. Vehicle needs to be driven at more than 50 MPH, then allowed to decelerate. When vehicle is decelerating while meeting all of the criteria listed, PCM will enable test to run. During the test, desired EGR parameter and EGR position sensor on scan tool will change from zero to a calibrated valve more than zero.

1. Engine is cranking or running.
2. System voltage is 8-18 volts.

Scheme 18

1. If powertrain diagnostic system check has already been performed, go to next step. If powertrain diagnostic system check has not been performed, go to «POWERTRAIN DIAGNOSTIC SYSTEM CHECK»(ref-121492-S39227106492001082900000) under DIAGNOSTIC SYSTEM CHECKS.
2. Ensure ignition is on. Using scan tool, command EGR from zero to 100 percent. If EGR position sensor remains close to desired EGR position at all commanded positions, go to next step. If EGR position sensor does not remain close to desired EGR position at all commanded positions, go to step 4.
3. Using scan tool, observe and record FREEZE FRAME/FAILURE RECORDS data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria, or as close to recorded FREEZE FRAME/FAILURE RECORDS data as possible. If DTC resets, go to next step. If DTC does not reset, fault may be intermittent. See INTERMITTENTS in appropriate TROUBLE SHOOTING - NO CODES article.
4. Turn ignition off. Disconnect EGR valve connector. (Scheme 15) Turn ignition on. Using a test light connected to ground, probe terminal "E" (Red wire) at EGR valve harness connector. (Scheme 18) Using scan tool, command EGR 0-10 percent. If test light turns on and off with each command, go to next step. If test light does not turn on and off with each command, go to step 6.
5. Connect test light between terminal "A" (Gray wire) and terminal "E" (Red wire) at EGR valve harness connector. Using scan tool, command EGR 0-10 percent. If test light turns on and off with each command, go to step 10. If test light does not turn on and off with each command, go to step 9.
6. If test light remains on with each command, go to step 8. If test light does not remain on with each command, go to next step.
7. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Check for an open or short to ground in Red wire between terminal "E" at EGR valve harness connector and terminal No. 71 at PCM C1 harness connector. (Scheme 13)and (Scheme 18). If any problems are found, repair as necessary. After repairs, go to step 14. If no problems are found, go to step 11.
8. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Turn ignition on. Measure voltage between ground and terminal "E" (Red wire) at EGR valve harness connector. If any voltage is indicated, repair short to voltage in Red wire between EGR valve and PCM. After repairs, go to step 14. If no voltage is indicated, go to step 11.
9. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Check continuity of Gray wire between terminal "A" at EGR valve harness connector and terminal No. 70 at PCM C2 harness connector. (Scheme 13)and (Scheme 18). If continuity does not exist, repair open in Gray wire. After repairs, go to step 14. If continuity exists, go to step 11.
10. Check for poor connections at EGR valve connector. Repair connector as necessary. After repairs, go to step 14. If connector is okay, go to step 12.
11. Check for poor connections at PCM connectors. Repair connectors as necessary. After repairs, go to step 14. If connectors are okay, go to step 13.
12. Replace EGR valve. After repairs, go to step 14.
13. Replace PCM. Program replacement PCM. See «PROGRAMMING»(ref-121492-S36116474272001082900000). After repairs, go to next step.
14. Turn ignition off. Reconnect all disconnected connectors. Turn ignition on. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria. If DTC runs and passes, go to next step. If DTC resets, go to step 2.
15. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, test is complete. If any other DTCs are set, repair DTCs as necessary. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000).

1. Ignition voltage is more than 11 volts.
2. EGR is enabled.

Only condition for running this DTC is system voltage must be more than 11.6 volts.

The following conditions are for running a passive test (engine in open loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Air/fuel ratio is more than 12.5:1.
8. Engine coolant temperature is 41-230°F (5-110°C).
9. Intake air temperature is 41-140°F (5-60°C).
10. Power enrichment or deceleration fuel cutoff is not active.

The following conditions are for running an active test (engine in closed loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Fuel system is in closed loop.
8. Evaporative emissions purge is active.
9. Engine coolant temperature is more than 154°F (68°C).

The following conditions are for running a passive test (engine in open loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Air/fuel ratio is more than 12.5:1.
8. Engine coolant temperature is 41-230°F (5-110°C).
9. Intake air temperature is 41-140°F (5-60°C).
10. Power enrichment or deceleration fuel cutoff is not active.

The following conditions are for running an active test (engine in closed loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Fuel system is in closed loop.
8. Evaporative emissions purge is active.
9. Engine coolant temperature is more than 154°F (68°C).

Scheme 19

1. If powertrain diagnostic system check has already been performed, go to next step. If powertrain diagnostic system check has not been performed, go to «POWERTRAIN DIAGNOSTIC SYSTEM CHECK»(ref-121492-S39227106492001082900000) under DIAGNOSTIC SYSTEM CHECKS.
2. Remove and inspect fuse No. 42 (AIR PUMP fuse). Fuse is located in underhood fuse block. If fuse is okay, reinstall fuse and go to next step. If fuse is blown, go to step 14.
3. If DTC P0412 or P0418 is also set, repair DTC before continuing with this test. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000). If DTC P0412 or P0418 is not set, go to next step.
4. Ensure ignition is on. Using scan tool, select OUTPUT CONTROLS and enable AIR system. If AIR pump turns on, go to step 9. If AIR pump does not turn on, go to next step.
5. Turn ignition off. Disconnect AIR pump relay. (Scheme 19) Turn ignition on. Using a test light connected to ground, probe terminal No. 30 (Red wire) at AIR pump relay harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step 16.
6. Connect a fused 3-amp jumper wire between terminals No. 30 (Red wire) and No. 87 (Red wire) at AIR pump relay harness connector. If AIR pump turns on, go to step 22. If AIR pump does not turn on, go to next step.
7. Ensure jumper wire is still connected. Disconnect AIR pump connector. Using a test light connected to ground, probe terminal "B" (Red wire) at AIR pump harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step 17.
8. Ensure jumper wire is still connected. Connect a test light between terminal "A" (Black wire) and terminal "B" (Red wire) at AIR pump harness connector. If test light illuminates, go to step 24. If test light does not illuminate, go to step 18.
9. Disconnect vacuum source from AIR solenoid. see scheme 11 Connect a vacuum gauge to vacuum source. Start engine and allow it to idle. If any engine vacuum is displayed on vacuum gauge, go to next step. If no engine vacuum is displayed on vacuum gauge, go to step 21. NOTE: AIR solenoid may also be referred to as AIR by-pass valve solenoid or AIR vacuum control solenoid valve.
10. Turn ignition off. Reconnect vacuum source to AIR solenoid. Disconnect AIR solenoid-to-AIR shutoff valves vacuum hose at AIR solenoid. Connect a vacuum gauge to AIR solenoid port. Start engine and allow it to idle. Using scan tool, select OUTPUT CONTROLS and enable AIR system. If vacuum is indicated on vacuum gauge when AIR system is enabled, go to next step. If no vacuum is indicated on vacuum gauge when AIR system is enabled, go to step 23.
11. Inspect vacuum lines to each AIR shutoff valve. Check for blockage, poor connections and damage. If any problems are found, repair as necessary. After repairs, go to step 21. If no problems are found, go to next step.
12. Disconnect both AIR intermediate hoses and/or pipes from AIR shutoff valves. Start engine and allow it to idle. Using scan tool, enable AIR system. If air is present at both hoses, no problem is indicated at this time. Fault may be intermittent. If air is not present at both hoses, go to next step.
13. Check for restrictions, poor connections, and damage at following components: AIR inlet and outlet hoses from AIR pump. AIR intermediate hoses and/or pipes. AIR crossover hose and/or pipe. If any problems are found, repair as necessary. After repairs, go to step 26. If no problems are found, no problem is indicated at this time. Fault may be intermittent.
14. Turn ignition off. Disconnect AIR pump relay. (Scheme 19) Remove fuse No. 42 (AIR PUMP fuse) from underhood fuse block. Using a test light connected to positive battery voltage, probe terminal No. 30 (Red wire) at AIR pump relay harness connector. If test light illuminates, go to step 19. If test light does not illuminate, go to next step.
15. Disconnect AIR pump connector. Using a test light connected to positive battery voltage, probe terminal "B" (Red wire) at AIR pump harness connector. If test light illuminates, go to step 20. If test light does not illuminate, go to step 25.
16. Repair open in Red wire between fuse No. 42 and AIR pump relay. After repairs, go to step 26.
17. Repair open in Red wire between AIR pump and AIR pump relay. After repairs, go to step 26.
18. Repair faulty ground connection or open in Black wire between AIR pump relay and ground. After repairs, go to step 26.
19. Repair short to ground in Red wire between fuse No. 42 and AIR pump relay. After repairs, go to step 26.
20. Repair short to ground in Red wire between AIR pump relay and AIR pump. After repairs, go to step 26.
21. Repair vacuum hose as necessary. After repairs, go to step 26.
22. Replace AIR pump relay. After repairs, go to step 26.
23. Replace AIR solenoid. After repairs, go to step 26.
24. Check for poor connections at AIR pump connector. Repair connector as necessary. After repairs, go to step 26. If connector is okay, go to next step.
25. Replace AIR pump. After repairs, go to next step.
26. Turn ignition off. Reconnect all disconnected connectors. Turn ignition on. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria. If DTC runs and passes, go to next step. If DTC resets, go to step 2.
27. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, test is complete. If any other DTCs are set, repair DTCs as necessary. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-121492-S42745357372001083100000).

1. Engine is running.
2. System voltage is 8-16 volts.

1. Engine is running.
2. System voltage is 8-16 volts.

1. Engine is running.
2. System voltage is 8-16 volts.

1. Engine is running.
2. System voltage is 8-16 volts.

1. DTC P0030, P0036, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0130, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0140, P0141, P0150, P0151, P0152, P0153, P0154, P0155, P0171, P0172, P0174, P0175, P0201-P0208, P0300, P0335, P0336, P0340, P0341, P0351-P0358, P0385, P0386, P0404, P0405, P0410, P0412, P0418, P0419, P0440, P0442, P0443, P0446, P0449, P0452, P0453, P0502, P0503, P0506, P0507, P1031, P1032, P1133, P1134, P1153, P1154, P1336, P1359, P1360, P1372, P1415, P1416 or P1441 is not set.
2. Engine speed since end of last idle period is more than 800 RPM for 46 seconds.
3. Idle period is less than 60 seconds.
4. Actual engine speed is within 100 RPM of desired engine speed, for non-California vehicles.
5. Actual engine speed is within 125 RPM of desired engine speed, for California vehicles.
6. Engine run time is more than 7.5 minutes.
7. Predicted catalyst temperature is 788-1202°F (420-650°C).
8. Barometric pressure is more than 10.1 psi (75 kPa).
9. Engine coolant temperature is 160-248°F (71-120°C).
10. Intake air temperature is 21-392°F (6-200°C).
11. Engine is in closed loop fuel control.
12. Less than 6 tests have been attempted during this ignition cycle.
13. One test has been attempted during idle period.

1. DTC P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1115, P1121 or P1122 is not set.
2. System voltage is 10-18 volts.
3. Barometric pressure is more than 10.1 psi (75 kPa).
4. Fuel level is 15-85 percent.
5. Engine coolant temperature is 39-86°F (4-30°C).
6. Intake air temperature is 39-86°F (4-30°C).
7. Start-up engine coolant temperature and intake air temperature are within 48°F (9°C) of each other.
8. Vehicle speed sensor is less than 75 MPH.

1. DTC P0107. P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1115, P1121 or P1122 is not set.
2. System voltage is 10-18 volts.
3. Barometric pressure is more than 10.1 psi (75 kPa).
4. Fuel level is 15-85 percent.
5. Engine coolant temperature is 39-86°F (4-30°C).
6. Intake air temperature is more than 39-86°F (4-30°C).
7. Start-up engine coolant temperature and intake air temperature are within 48°F (9°C) of each other.
8. Vehicle speed sensor is less than 75 MPH.

1. Engine speed is more than 400 RPM.
2. System voltage is 6-18 volts.

1. DTC P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0440, P0442, P0443, P0449, P0452, P0453, P1106, P1107, P1111, P1112, P1114, P1115, P1121 or P1122 is not set.
2. System voltage is 10-18 volts.
3. Barometric pressure is more than 10.1 psi (75 kPa).
4. Fuel level is 30-85 percent.
5. Engine coolant temperature is 39-86°F (4-30°C).
6. Intake air temperature is 39-86°F (4-30°C).
7. Vehicle speed sensor is less than 75 MPH.

1. Engine is running.
2. System voltage is 6-18 volts.

Only condition for running this DTC is engine must be running.

Only condition for running this DTC is engine must be running.

1. Engine speed is more than 425 RPM.
2. System voltage is 8-18 volts.

1. Engine speed is more than 425 RPM.
2. System voltage is 8-18 volts.

1. Diagnostic Trouble Code (DTC) P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0335, P0336, P0340, P0341, P0385, P0386, P0401, P0403, P0404, P0405, P0440, P0442, P0443, P0446, P0449, P1106, P1107, P1111, P1112, P1114, P1115, P1121, P1122, P1336, P1372, P1404 or P1441 is not set.
2. Engine coolant temperature is more than -40°F (-40°C).
3. Intake air temperature is more than -1°F (-18°C).
4. Ignition voltage is 10.5-16 volts.
5. Barometric pressure is more than 9.43 psi (65 kPa).
6. Engine run time is more than 40 seconds.
7. Transmission gear state has not changed for 3 seconds.
8. Torque converter clutch state has not changed in 3 seconds.
9. Throttle position sensor is less than 1.5 percent.
10. Spark advance is less than 12.39 degrees.
11. Spark retard is more than -13.79 degrees.
12. Vehicle speed sensor is less than 2 MPH.
13. Listed conditions are present for 3 seconds.

1. Engine is running.
2. A/C has been requested.

1. System voltage is less than 11 volts.
2. Engine speed is more than 1500 RPM.
3. Vehicle speed is less than 25 MPH.

1. Engine speed is more than 1500 RPM.
2. Vehicle speed is less than 25 MPH.

1. Engine speed is more than 1500 RPM.
2. Vehicle speed is less than 25 MPH.

Only condition for running this DTC is ignition must be on.

1. DTC P0601 is not set.
2. Ignition is on.

Only condition for running this DTC is ignition must be on.

Only condition for running this DTC is ignition must be on.

1. DTC P0601 or P0604 is not set.
2. Ignition is on.

1. Engine is running.
2. System voltage is 8-16 volts.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold. Bank 2 sensor 1 is located in left (front) exhaust manifold.

1. System voltage is 9-18 volts.
2. Ignition is on.

1. DTC P0121, P0122 or P0123 is not set.
2. Throttle angle is less than 98 percent when engine speed is more than 1000 RPM.
3. Throttle angle is less than 90 percent when engine speed is less than 1000 RPM.

1. DTC P0121, P0122 or P0123 is not set.
2. Throttle angle is more than 9 percent when engine speed is more than 1000 RPM.
3. Throttle angle is more than zero percent when engine speed is less than 1000 RPM.

Note. IAT sensor is integral to Mass Airflow (MAF) sensor. IAT sensor may also be referred to as MAF/IAT sensor.

1. DTC P0101, P0102, P0103, P0117, P0118, P0125, P0502, P0503, P1114 or P1115 is not set.
2. Engine run time is more than 5 seconds.
3. Engine speed is more than 50 RPM for 5 seconds.
4. Engine coolant temperature is more than 140°F (60°C).
5. Vehicle speed is less than 48 MPH.
6. Mass airflow is less than 12 grams/sec.

Note. IAT sensor is integral to Mass Airflow (MAF) sensor. IAT sensor may also be referred to as MAF/IAT sensor.

1. DTC P0101, P0102, P0103, P0117, P0118, P0125, P0502, P0503, P1114 or P1115 is not set.
2. Engine coolant temperature is less than 212°F (100°C).
3. Vehicle speed is more than 9 MPH.

1. DTC P0112, P0113, P1111 or P1112 is not set.
2. Engine run time is more than 10 seconds.
3. Intake air temperature is less than 158°F (70°C).

1. DTC P0112, P0113, P1111 or P1112 is not set.
2. Engine run time is more than 60 seconds.
3. Intake air temperature is more than 19°F (-7°C).

Only condition for running this DTC is ignition must be on.

Only condition for running this DTC is ignition must be on.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. System voltage is 9-18 volts.
3. Engine run time is more than 3 minutes.
4. Engine speed is 1200-2800 RPM.
5. Mass airflow is 5-35 gram/sec.
6. Throttle position angle is more than 3 percent.
7. Engine coolant temperature is more than 167°F (75°C).
8. Closed loop fuel control is enabled.
9. Air/fuel ratio is 14.5-14.8:1.
10. Transmission not in Park, Reverse or Neutral.
11. Listed conditions are met for 3 seconds.

Note. HO2S bank 1 sensor 1 is located in right (rear) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0135, P0151, P0152, P0201-P0208, P0300, P0410, P0440, P0442, P0443, P0446, P0449, P1133, P1415, P1416 or P1441 is not set.
2. Engine speed is 1200-2800 RPM.
3. Throttle position angle is more than 3 percent.
4. Exhaust gas recirculation is not active.
5. Secondary air injection system tests are not active.
6. Catalyst test is not active.
7. Mass airflow is 15-35 grams/sec.
8. System voltage is 9-18 volts.
9. Closed loop fuel control enabled.
10. Engine coolant temperature is more than 167°F (75°C).
11. Transmission is not in Park, Reverse or Neutral.
12. Engine run time is 3 minutes.
13. Listed conditions are met for 3 seconds.

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0201-P0208, P0410, P0440, P0442, P0443, P0446, P0449, P1415, P1416 or P1441 is not set.
2. System voltage is 9-18 volts.
3. Engine run time is more than 3 minutes.
4. Engine speed is 1200-2800 RPM.
5. Mass airflow is 5-35 gram/sec.
6. Throttle position angle is more than 3 percent.
7. Engine coolant temperature is more than 167°F (75°C).
8. Closed loop fuel control is enabled.
9. Air/fuel ratio is between 14.5-14.8.
10. Transmission not in Park, Reverse or Neutral.
11. Listed conditions are met for 3 seconds

Note. HO2S bank 2 sensor 1 is located in left (front) exhaust manifold.

1. DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0131, P0132, P0135, P0151, P0152, P0201-P0208, P0300, P0410, P0440, P0442, P0443, P0446, P0449, P1133, P1415, P1416 or P1441 is not set.
2. Engine speed is 1200-2800 RPM.
3. Throttle position angle is more than 3 percent.
4. Exhaust gas recirculation is not active.
5. Secondary air injection system tests are not active.
6. Catalyst test is not active.
7. Mass airflow is 15-35 grams/sec.
8. System voltage is 9-18 volts.
9. Closed loop fuel control enabled.
10. Engine coolant temperature is more than 167°F (75°C).
11. Transmission is not in Park, Reverse or Neutral.
12. Engine run time is 3 minutes.
13. Listed conditions are met for 3 seconds.

1. DTC P0335, P0336, P0340, P0341, P0385, P0386 or P1372 is not set.
2. Engine coolant temperature is more than 158°F (70°C).

DTC sets when PCM has not successfully learned crankshaft position system variation.

Only condition for running this DTC is ignition must be on.

Only condition for running this DTC is ignition must be on.

1. Engine cranking or running.
2. PCM is operating in angle-based mode of decoding engine position.

1. Engine load is less than 100 percent.
2. Engine speed is less than 6500 RPM.
3. Vehicle speed is more than .6 MPH.
4. A misfire DTC is occurring and requesting malfunction indicator light on.

1. Engine load is less than 87 percent.
2. Engine speed is less than 5000 RPM.
3. Vehicle speed is more than 10 MPH.
4. A misfire DTC is occurring and requesting MIL on.

The following conditions are for running a passive test (engine in open loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Air/fuel ratio is more than 12.5:1.
8. Engine coolant temperature is 41-230°F (5-110°C).
9. Intake air temperature is 41-140°F (5-60°C).
10. Power enrichment or deceleration fuel cutoff is not active.

The following conditions are for running an active test (engine in closed loop).

1. Engine is running.
2. Engine speed is more than 600 RPM
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Fuel system is in closed loop.
8. Evaporative emissions purge is active.
9. Engine coolant temperature is more than 154°F (68°C).

The following conditions are for running a passive test (engine in open loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Air/fuel ratio is more than 12.5:1.
8. Engine coolant temperature is 41-230°F (5-110°C).
9. Intake air temperature is 41-140°F (5-60°C).
10. Power enrichment or deceleration fuel cutoff is not active.

The following conditions are for running an active test (engine in closed loop).

1. Engine is running.
2. Engine speed is more than 600 RPM.
3. Throttle is steady.
4. Engine load is less than 80 percent.
5. System voltage is more than 10.5 volts.
6. Mass airflow is less than 35 grams/sec.
7. Fuel system is in closed loop.
8. Evaporative emissions purge is active.
9. Engine coolant temperature is more than 154°F (68°C).

1. DTC P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0440, P0442, P0446, P0443, P0449, P0452, P0453, P1106, P1107, P1111, P1112, P1114, P1115, P1121 or P1122 is not set.
2. System voltage is 10-18 volts.
3. Barometric pressure is more than 10.1 psi (75 kPa).
4. Fuel level is 15-85 percent.
5. Engine coolant temperature at start-up is 39-86°F (4-30°C).
6. Intake air temperature at start-up is 39-86°F (4-30°C).
7. Vehicle speed sensor is less than 75 MPH.

Note. A/C refrigerant low temperature sensor may also be referred to as A/C low temperature sensor.

Only condition for running this DTC is ignition must be on.

Only condition for running this DTC is DIM must be powered.

Only condition for running this DTC is DIM must be powered.

1. DTC P1574 is not set.
2. Traction control and anti-lock brake systems have not failed.
3. Traction control and anti-lock brake systems are not active.
4. Non-drive wheel speed goes to more than 20 MPH and then does not go to less than 4 MPH.

Only condition for running this DTC is engine must be running. DTC will set when PCM detects a voltage out of range/tolerance on the 5-volt reference 1 circuit and condition is present longer than 10 seconds.

Only condition for running this DTC is engine must be running.