P0040

P0040

Diagnosis information - Control unit DME (DFI)

Oxygen sensor(s) Ahead of catalytic converter interchanged

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
- --> Perform all short tests in sequence (without Tank tightness).
or
- Lambda control Active
- Driving, at:
- small valve lift (See Actual value A220)
- large valve lift (See Actual value A220)

Possible fault causes
- Oxygen sensor(s) Ahead of catalytic converter Bank I and Bank 2 interchanged