P0140
P0140
Diagnosis information - DME V8 DFI
Oxygen sensor behind catalytic converter, bank 1, open circuit
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
- Then engine idling > 30 seconds
Possible fault causes
- Open circuit in signal line and / or ground line of oxygen sensor
- Loose contact in connector
- Oxygen sensor behind catalytic converter, bank 1, faulty
Affected contacts on the DME control unit connector
Connector [A]:
- Contact 49
- Contact 50
Affected contacts on the oxygen sensor connector behind catalytic converter, bank 1:
- Contact 3
- Contact 4