P0172

P0172

Diagnosis information - Control unit DME (DFI)

Oxygen sensing adaptation Bank 1: System too rich

Diagnostic conditions
- Short test
or
- Lambda control Active
- Lambda control taught
- Engine temperature more than 60 °C (°F)
- Intake air temperature less than 80 °C (°F)
- Engine running more than 45 Second(s) s), at:
- Engine speed less than 800 1/min
- then Trip with different operating conditions, at:
- Engine speed 1,060 rpm ... 2,490 rpm

Possible fault causes
- High fuel content in engine oil
- Exhaust system leaks (Engine --> Oxygen sensor in front of catalytic converter)
- Injection valve Faulty (Mechanical fault)
- Timing incorrectly set
- Fault in area Fuel high-pressure, Intake manifold pressure sensor, Throttle adjusting unit, Ambient pressure sensor, Intake air temperature sensor, Speed sensor, Valve lift control, Camshaft adjustment

Fault setting condition(s)
- Opposed adaptation values in connection with misfires indicate that the timing is out of adjustment.
(negative deviation --> leaning)