P0133

P0133

Diagnostic information - DME (DFI)

O2S ahead of cat. converter, bank 1, dyn. response

Diagnostic conditions
- Engine running more than 2 minutes
- Engine speed 1,184 ... 3,200 rpm
- Mass air flow 165 ... 600 mg/stoke
- All 4 oxygen sensors ready for operation
- No overrun fuel cutoff

Possible fault causes
- Short circuit to B+/ground/between lines or open circuit in the lines
- Different air flow to the oxygen sensor behind the catalytic converter, at:
- Catalytic converter damaged
- modified or non-genuine components
- Oxygen sensor ahead of catalytic converter, bank 1 faulty (aged)