P0131

P0131

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
- Vehicle voltage > 9 V
- Engine idling > 3 seconds

Possible fault causes
- Open circuit in line
- Short circuit to B+
- Short circuit to ground
- Oxygen sensor faulty

Affected contacts on the DME control unit connector
Connector [A]:
- Contact 25
- Contact 13
- Contact 26
- Contact 12

Affected contacts on the oxygen sensor connector ahead of catalytic converter, bank 1:
- Contact 1
- Contact 2
- Contact 5
- Contact 6