DTC P0103: Mass Or Volume Air Flow Sensor "A" Circuit High: Notes
- -
DTC detecting condition:
Immediately at fault recognition
Trouble symptom:
- Improper idling
- Engine stalls.
- Poor driving performance
NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Basic Diagnostic Procedure>PROCEDURE .
- CHECK DATA MONITOR
.
- Start the engine.
- Using the Subaru Select Monitor, read the value in [Air Flow Rate from Mass Air Flow Sensor].NOTE: For detailed operation procedures, refer to "Common (Diagnostics)". Ref. to COMMON (diag)>DATA MONITOR .
Is the value of [Mass Air Flow] 320.5 g/s (42.4 lb/min) or more?
Yes : Go to 2.
No : Even if DTC is detected, the circuit has returned to a normal condition at this time.
Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. - CHECK FOR POOR CONTACT
.
Check for poor contact of mass air flow and intake air temperature sensor connector.
Is there poor contact of mass air flow and intake air temperature sensor connector?
Yes : Repair the poor contact of mass air flow and intake air temperature sensor connector.
No : Replace the mass air flow and intake air temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>MASS AIR FLOWS AND INTAKE AIR TEMPERATURE SENSOR .