P2237

P2237

Diagnosis information - DME V8 DFI

Oxygen sensor ahead of catalytic converter, bank 1

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

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

Affected contacts on the DME control unit connector
Connector [A]:
- Contact 25
- Contact 13

Affected contacts on oxygen sensor connector ahead of catalytic converter, bank 1:
- Contact 1
- Contact 2