Diagnostic Test
- DTC IS ACTIVE
Start the engine and allow it to reach operating temperature.
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.NOTE: It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to set.With a scan tool, select View DTCs.
Is the DTC Active at this time?
Yes
- Go To 2.
No
- Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
- CHECKING THE OXYGEN SENSOR OPERATION NOTE: Check for signs of contaminants that may have damaged the O2 Sensor, such as contaminated fuel, unapproved silicone, oil and coolant.
Perform the diagnostic procedure for *CHECKING THE OXYGEN SENSOR OPERATION .
Were any problems found?
Yes
- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST .
No
- Go To 3.
- POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the 1/2 O2 Sensor and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and the Powertrain Control Module connectors.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST .
No
- Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
- Perform POWERTRAIN VERIFICATION TEST .