P1093

P1093

Hot-film mass air flow sensor (MAF2) - above limit value

Diagnostic conditions
- Battery voltage > 8 V
- 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)]]
- Short circuit to B+ in signal line
- Short circuit to B+ in sensor voltage
- DME control unit faulty

Affected pins
DME control unit plug A, pin 27, and pin 3 of hot-film mass air flow sensor plug
DME control unit plug A, pin 53, and pin 4 of hot-film mass air flow sensor plug
DME control unit plug B, pin 109, and pin 5 of hot-film mass air flow sensor plug

Diagnosis/fault finding

Hot-film mass air flow sensor