P0155

P0155

Diagnosis information - Control unit DME (DFI)

Heating current circuit Oxygen sensor in front of catalytic converter Bank 2

NOTE
Separated plug connection = open reference-air duct.
Damage to oxygen sensor.

- DO NOT use spray, grease, fluid or similar products on the oxygen sensor plug connections.

INFORMATION
- Do not interchange the oxygen sensor in front of the catalytic converter with the sensor behind the catalytic converter as this will result in implausible fault entries.
- The plugs themselves are coded and cannot be interchanged.

Diagnostic conditions
- Engine running > 10 Second(s), at:
- Oxygen sensor heater Ahead of catalytic converter Active
- Lambda control Active

- none of the following faults stored: P0050, P0051, P0052 :

Possible fault causes
- Contact resistance (Power supply or Activation)
- Shunt (high-resistance) Heating current circuit --> Signal lead
- Oxygen sensor in front of catalytic converter Bank 2 Faulty