O2 Sensor Circuit Slow Response
Diagnostic conditions
- Air mass between 25 kg /h and 120 kg /h
- Oxygen sensing after catalytic converter is active
- Basic adaptation has reached steady condition
- No secondary air diagnosis
- No fuel tank ventilation diagnosis
- EVAP canister not highly loaded
- No other oxygen sensor faults
Possible cause of fault
- Oxygen sensor faulty
Affected terminals
None
Diagnosis/troubleshooting
NOTE:
- Do not use contact spray on the oxygen sensor plug connections as this may cause irreparable damage to the wiring (contamination of the oxygen sensor via the reference air channel).