P033C

P033C

Diagnosis information - Control unit DME (DFI)

Knock sensor 4

Diagnostic conditions
- Short test
or
- Engine running , at:
- Period since engine was started > 10 Second(s)
- Engine temperature > 50 °C (°F)
- Engine speed > 1,000 1/min
- different load ranges

Possible fault causes
- Loose contact or corrosion on connectors or lines
- Short circuit to B+/ground/between lines or open circuit in the lines
- Knock sensor 4 loose or braced
- Knock sensor 4 Faulty
- Level Engine oil too low
- Engine Faulty (Mechanical fault)

Fault setting condition(s)
- The fault is detected if the signal of the knock sensor changes insufficiently or is too weak (noise is >>quieter<< than expected).

Fault effects
- If the fault is stored, the ignition timing is retarded for all cylinders affecting this knock sensor in the [knock-control active] range.
- Knock control adaptation is idle.