Oxygen Sensor Ahead of TWC, Bank 1 - Below Limit

P0133

10 Oxygen Sensor Ahead of TWC, Bank 1 - Below Limit

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

Possible fault cause
- Oxygen sensor is dynamically inert

Affected terminals
- (none)

Diagnosis/Troubleshooting

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

Work Instruction 1:

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




Oxygen sensors ahead of and after catalytic converter