P2240

P2240

Diagnosis information - DME (DFI)

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
- Perform short test [Oxygen sensor active test]

or (if no short test is possible):

- Engine at operating temperature
- then drive for 2 minutes (incl. 1 overrun phase)
- then engine idling more than 40 seconds

Possible fault causes
- Open circuit, pumping current or virtual ground
- Oxygen sensor faulty