P0040
P0040
Diagnosis information - DME V8 DFI
Oxygen sensors ahead of catalytic converter interchanged
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
- Lambda control active
- Driving with large and small valve travel
Possible fault causes
- Oxygen sensors ahead of catalytic converter interchanged