P2180

P2180

Diagnosis information - DME

Lambda control adaptation FRAU (lower load range)
- below limit value

NOTE: Diagnosis should indicate a negative deviation of more than 30 % (weakening) of the lambda control adaptation in the partial load range (FRAU > 0.7).

Diagnostic conditions
- Engine load 15 .. 80 %
- Mass air flow via hot-film mass air flow sensor 40 ... 220 kg/h
- Engine speed 1,040 ... 4,760 rpm
- Lambda control ahead of catalytic converter active
- Engine temperature > 55.5 °C (132 °F)
- No tank ventilation
--> USA: Time after engine starts 250 ... 350 seconds
--> RoW: Time after engine starts 302 ... 402 seconds

- No faults detected for oxygen sensor
- No faults detected for tank vent
- No faults detected for hot-film mass air flow sensor

Possible fault causes
- Hot-film mass airflow sensor faulty (displaced characteristic/soiled, e.g. due to faulty air cleaner/unfiltered air)
(setpoint voltage with stopped engine and ignition on = 0.9 ... 1.1 V
- see Actual values, Filter [Mass airflow], [Mass airflow sensor 1 (sensor)] + for Turbo [Mass air flow sensor 2 (sensor)] )

- Fuel pressure too high
- Fuel injector faulty (dripping)
- Tank vent faulty (does not close completely)