P2106high severityPowertrain
Throttle Actuator Control System Forced Limited Power
on 2021 Subaru Legacy 2.5L H4 · AWD
What this code means
ECM has limited engine power output due to a detected throttle system malfunction.
Symptoms
- Reduced acceleration
- Check engine light
- Wrench/power limit warning
Common causes
- Throttle position disagreement
- APP sensor intermittent
- Throttle body degraded
Diagnostic steps
- Check for companion DTCs
- Monitor APP vs TPS correlation
- Test throttle response
Repair notes
Address underlying throttle system fault to restore full power.
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