P1156

P1156

Oxygen Sensor Ahead of TWC, Bank 2 - Open Circuit

Diagnosis conditions
- Vehicle at operating temperature, after this 3 minutes idle speed, then approx. 30 seconds increased idle speed.

Possible fault cause
- Oxygen sensors (heating connection)

Diagnosis/Troubleshooting

NOTE: Do not use contact spray on the connectors to oxygen sensor.







NOTE: Do not exchange oxygen sensors ahead of catalytic converter and after catalytic converter.







Oxygen sensors ahead of and after catalytic converter