P2174
P2174Input variables for charge measurement - below limit value
Diagnostic conditions
- Engine running
Possible fault cause
- 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)]]
- Heavily soiled throttle valve
- Throttle valve adjusting unit faulty (mechanically damaged)
Affected terminals
-
Diagnosis/fault finding
Hint:
If there is a fault in a hot-film mass air flow sensor, which must also be stored in the fault memory, this fault must then be eliminated first.
