NOTE: Do not exchange oxygen sensors ahead of catalytic converter and after catalytic converter.
Oxygen sensors ahead of and after catalytic converter
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
DME 7.8
P1157
30 Engine Compartment Temperature Sensor - Below Limit
Diagnosis conditions
- Ignition on
Possible fault cause
- Temperature sensor
- Short circuit to ground