P1070

P1070

Diagnosis information - Control unit DME (DFI)

Mass air flow flow, implausible too low (Leakage adaptation)

Diagnostic conditions
- Idle speed > 2 Minute(s)
- Trip with different operating conditions
- none of the following faults stored : Intake manifold pressure sensor, Throttle adjusting unit, Ambient pressure sensor, Intake air temperature sensor, Speed sensor, Valve lift control, Camshaft adjustment, Intake pipe switchover

Possible fault causes
- Throttle adjusting unit soiled
- Exhaust system Blocked / Cross section Narrowed
- Intake manifold pressure sensor - Electrical plug connection loose, oxidized, corroded, interrupted
- Tank vent Faulty (mechanical / electric)
- Fault in area Intake manifold pressure sensor, Throttle adjusting unit, Ambient pressure sensor, Intake air temperature sensor, Speed sensor, Valve lift control, Camshaft adjustment, Intake pipe switchover

Fault setting condition(s)
- Impermissibly large deviation of the measured air mass from the calculated air mass. , at:
- Increasing deviation over an extended period (See [Information])

INFORMATION
In this diagnosis, the intake system between the throttle valve and the engine (intake valves) is monitored.
- A mass air flow is calculated from the signals from the throttle potentiometer, engine speed sensor, intake air temperature sensor and ambient pressure sensor as well as other engine operating values.
- The calculated mass air flow is compared with that measured by the pressure sensor.
- deviation may be due to both the calculated mass air flow and the measured mass air flow.