P2303high severityPowertrain
Ignition Coil C Secondary Circuit
on 2003 Subaru Legacy 3.0L H6 · AWD
What this code means
Fault in ignition coil C secondary circuit (typically cylinder 3).
Symptoms
- Cylinder 3 misfire
- Check engine light
Common causes
- Failed coil
- Worn spark plug
- Boot damage
Diagnostic steps
- Swap coil
- Check plug
- Inspect for arcing
Repair notes
Replace coil and spark plug as needed.
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