P2304high severityPowertrain
Ignition Coil D Secondary Circuit
on 1998 Toyota Celica 2.2L I4 · FWD
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.
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P0002
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P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
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P0014
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P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1