P0157

P0157

Diagnosis information - DME (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 tank ventilation
- No tank ventilation diagnosis
- No other faults stored
- Engine at operating temperature
- Then drive for 2 min. (mass air flow more than 10 kg/h)
- Then engine idling more than 30 seconds

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