P2193
P2193Diagnosis information - DME V6 DFI
Lambda control adaptation in upper load range above limit value
NOTE: Diagnosis should indicate a positive deviation (enrichment) of more than 30% of the lambda control adaptation in the upper load range (FRAO > 1.3).
Diagnostic conditions
- Battery positive voltage between 10 V and 16 V
- Lambda control active
- Engine temperature > 60 °C (140 °F)
- Mass airflow > 240 kg/h
- Engine load > 24 %
Possible fault causes
- Incorrect main filling signal from hot-film mass air flow sensor (setpoint voltage with stopped engine and ignition on = 0.9 ... 1.1 V)
- Fuel pressure too low
- Mechanical fault of fuel injector(s)
- Fuel pump delivery too low