P0157

P0157

Diagnosis information - DME V8 DFI

Oxygen sensor behind catalytic converter, bank 2, below limit value

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).

NOTE: 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
- No secondary air
- No secondary air diagnosis
- No tank ventilation
- No tank ventilation diagnosis
- No other faults stored
- Engine at operating temperature
- Then drive for 2 min. (mass air flow > 10 kg/h)
- then > 30 sec. Engine idling

Possible fault causes
- Short to ground in signal line
- Short circuit between lines
- Oxygen sensor faulty (short circuit)

Affected contacts on the DME control unit connector
Connector [A]:
- Contact 36
- Contact 37

Affected contacts on the oxygen sensor connector behind catalytic converter, bank 1:
- Contact 3
- Contact 4