P1100moderate severityPowertrain
Starter Switch Circuit Malfunction
on 2002 Subaru Impreza 2.5L H4 · AWD
What this code means
The PCM has detected a malfunction in the starter switch circuit. The signal from the ignition switch indicating a start request is not being received correctly by the PCM.
Symptoms
- Check Engine Light
- PCM may not recognize engine cranking state
- Fuel and ignition timing strategy may be incorrect during start
- Extended crank time
Common causes
- Faulty ignition switch
- Wiring issue in starter switch signal circuit
- Corroded ignition switch connector
- Neutral safety switch issue affecting start signal
- PCM input circuit fault
Diagnostic steps
- Check starter switch signal on scan tool during cranking
- Inspect ignition switch connector
- Test starter switch circuit wiring for continuity
- Check neutral safety switch
- Verify PCM receives crank signal
Repair notes
Repair the ignition switch signal circuit or replace the ignition switch if faulty.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1