P2105critical severityPowertrain
Throttle Actuator Control System Forced Engine Shutdown
on 2004 Subaru Legacy 3.0L H6 · AWD
What this code means
ECM shut down the engine due to a critical electronic throttle control fault.
Symptoms
- Engine stalls and won't restart
- Check engine light
- Multiple warning lights
Common causes
- Severe throttle control fault
- APP sensor failure
- Critical wiring damage
- ECM hardware failure
Diagnostic steps
- Check for other DTCs
- Inspect APP sensors
- Check throttle body
- Verify ECM power and grounds
Repair notes
Diagnose root cause immediately. This indicates a safety-critical throttle system failure.
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