P0052

P0052

Diagnosis information - DME (DFI)

Oxygen sensor heater driver ahead of catalytic converter, bank 2

NOTE:
- Do not use contact spray on the oxygen sensor's plug connections as this will result in irreparable damage to the lines (blockage of reference air duct).
- Do not interchange the oxygen sensor ahead of catalytic converter with the sensor behind the catalytic converter as this will result in implausible fault entries.

Diagnostic conditions
- Vehicle voltage more than 9 V
- Engine running more than 10 seconds

Possible fault causes
- Short circuit to B+
- Short circuit to ground
- Open circuit
- Fuse faulty
- Loose contact in connector
- Oxygen sensor faulty
- Contact 3