P1091

P1091

Diagnosis information - DME V8 DFI

Mass air flow sensor - limit value exceeded / limit value not reached

Diagnostic conditions
- Vehicle voltage > 9 V
- Engine running

Possible fault causes
- Short circuit to B+/ground/between lines or open circuit in the lines
- Mass air flow sensor faulty
(setpoint voltage with stopped engine and ignition on = 0.9 ... 1.1 V
- see Actual values, Filter [MAF], [Mass air flow 1 (sensor)] + [Mass air flow 2 (sensor)])