12 Oxygen Sensor After TWC, Bank 1 - Open Circuit

P0140

12 Oxygen Sensor After TWC, Bank 1 - Open Circuit

Diagnosis conditions
- Exhaust temperature between 250 °C and 750 °C
- Battery positive voltage greater than 9.5 V
- 200 seconds after start

Possible fault cause
- Open circuit in signal wire or ground wire of oxygen sensor
- Oxygen sensor heating faulty

Affected terminals
- II/11 and II/17

Diagnosis/Troubleshooting

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

Work Instruction 1 - 3:

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





Oxygen sensors ahead of and after catalytic converter