P1094
P1094Implausible mass air flow ahead of throttle valve
Diagnostic conditions
- Battery voltage between 10 V and 16 V
- Engine running
Possible fault cause
- Hot-film mass air flow sensor 1 and / or 2 faulty (set point 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)]]
- Throttle valve stiff or >>blocked<<
- Secondary air between hot-film mass air flow sensor and throttle valve (e.g. crack in hose)
- Throttle valve adjusting unit faulty
- Intake air temperature sensor faulty (in hot-film mass air flow sensor)
- DME faulty (pressure sensor for ambient air pressure)
Affected terminals
-
Diagnosis/fault finding
Hint:
- For this fault code, the intake system between the hot-film mass air flow sensor and the throttle valve is monitored.
- The pressure sensor for ambient air pressure is installed in the engine control unit.
Hint:
- Adaptation >>RKAT<< is additive, remains unadapted at ± 0.0%
- Adaptation >>FRAU<< is multiplicative, remains unadapted at + 1.00
