P2301high severityPowertrain
Ignition Coil A Secondary Circuit
on 2021 Subaru Legacy 2.5L H4 · AWD
What this code means
Fault detected in the secondary winding circuit of ignition coil A (cylinder 1).
Symptoms
- Misfire
- Check engine light
- Poor performance
Common causes
- Failed ignition coil
- Cracked coil boot
- Spark plug gap too wide
Diagnostic steps
- Swap coil to different cylinder
- Check spark plug
- Inspect coil boot for carbon tracking
Repair notes
Replace ignition coil. Check spark plug condition.
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