P2304high severityPowertrain
Ignition Coil D Secondary Circuit
on 2009 Subaru Forester 2.5L H4 · AWD
What this code means
Fault in ignition coil D secondary circuit (typically cylinder 4).
Symptoms
- Cylinder 4 misfire
- Check engine light
- Engine shaking
Common causes
- Failed coil
- Spark plug fouled
- Carbon tracking
Diagnostic steps
- Coil swap test
- Plug inspection
- Check for oil in spark plug well
Repair notes
Replace coil. Check valve cover gasket if oil in plug well.
Other Powertrain codes on this vehicle
P0001
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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