P0037
P0037
Diagnosis information - DME V8 DFI
Output stage, oxygen sensor heater behind catalytic converter
NOTE: Do not use contact spray on the oxygen sensor's plug connections (as this will result in irreparable damage to the wiring; oxygen sensor will
be polluted via the reference air duct).
NOTE:
Oxygen sensors in front of and behind catalytic converter.
- Do not interchange the oxygen sensor in front of the catalytic converter with the sensor behind the catalytic converter as this will result in
implausible fault entries.
- The plugs themselves are coded and cannot be interchanged.
Diagnostic conditions
- Vehicle voltage > 9 V
- Engine running > 10 seconds
- Oxygen sensor heater active
Possible fault causes
- Loose contact or corrosion on connectors or lines
- Short circuit to B+/ground/between lines or open circuit in the lines
- Oxygen sensor faulty