P0050
H02S Heater Control Circuit
NOTE: The diagnosis for this fault is different for models with turbo engines and models with naturally-aspirated engines
Diagnosis/troubleshooting - all turbo models
Diagnostic conditions
- Battery voltage between 9.5 V and 16 V
- Time elapsed after engine start-up greater than 10 seconds
Possible cause of fault
- Open circuit
Affected terminals
DME control module, connector II, pin 13 and oxygen sensor jack ahead of catalytic converter, bank 2, pin 4
Diagnosis/troubleshooting
NOTE: Do not use contact spray on the oxygen sensor plug connections as this may cause irreparable damage to the wiring (contamination of the
oxygen sensor via the reference air channel).
Part 1
Part 2
Diagnosis/troubleshooting - all naturally-aspirated models
Diagnostic conditions
- Engine running
Possible cause of fault
- Resistance of oxygen sensor heating too high
- Open circuit
- Oxygen sensor faulty
- DME control module faulty
Affected terminals
DME control module, connector II, pin 13 and oxygen sensor jack ahead of catalytic converter, bank 2, pin 2