P1550
P1550Function monitoring of engine speed - signal implausible
Diagnostic conditions
- Engine speed greater than 1120 rpm
Possible fault cause
- Fault "P0102" or "P0103" is set
- Hot-film mass air flow sensor 1 and / or 2 faulty (setpoint voltage with stopped engine and ignition on = 0.9 to 1.1 V) --> see Actual values, Filter [[DME mass air flow]], [[Mass air flow 1 (sensor)]] + [[Mass air flow 2 (sensor)]]
- DME control unit faulty
Affected terminals
-
Diagnosis/fault finding
