Part 1
Part 2
NOTE: Do not exchange oxygen sensors ahead of catalytic converter and after catalytic converter.
Oxygen sensors ahead of and after catalytic converter
13 Oxygen Sensor Heating Ahead of TWC, Bank 1 - Open Circuit
Diagnosis conditions
- Battery voltage between 9.5 V and 16 V
- Time elapsed after engine start-up greater than 10 seconds
Possible fault cause
- Open circuit
Affected terminals
II/19
Diagnosis/Troubleshooting
NOTE: Do not use contact spray on the connectors to oxygen sensor.