DTC P2302: Ignition Coil #1 Secondary Circuit-Insufficient Ionization, DTC P2305: Ignition Coil #2 Secondary Circuit-Insufficient Ionization, DTC P2308: Ignition Coil #3 Secondary Circuit-Insufficient Ionization, DTC P2311: Ignition Coil #4 Secondary Circuit-Insufficient Ionization, DTC P2314: Ignition Coil #5 Secondary Circuit-Insufficient Ionization Or DTC P2317: Ignition Coil #6 Secondary Circuit-Insufficient Ionization: Testing

Turn ignition on, engine off. With the DRBIII® scan tool, read DTCs and record the related freeze frame data. Is the Good Trip counter displayed and equal to zero? If yes, go to next step. If no, go to step 3.
Turn the ignition off. Disconnect the ignition coil harness connector that is related to the DTC that is set. Remove the ignition coil. Before continuing inspect the ignition coil for damage or carbon tracking on the coil or the spark plug insulator boot. Replace ignition coil as necessary. If no problem is found, install a spark tester to the ignition coil. Reconnect the ignition coil harness connector to the ignition coil. While cranking the engine, observe the spark coming from the spark tester. The ignition coil should generate a crisp Blue spark that is able to jumper the gap of the spark tester. Does the ignition coil generate a good spark. If yes, replace the spark plug. If no, replace the ignition coil.
Turn the ignition off. Remove the spark plug. Inspect the spark plug for the following conditions.
- Cracks
- Carbon Tracking
- Foreign Material
- Gap Size Out Of Specification
- Loose Or Broke Electrode
Lightly tap the bottom of the spark plug on a solid surface. The electrode in the spark plug should not move. Were any of the above conditions present? If yes, replace the Spark Plug. If no, see INTERMITTENT CONDITION under SELF-DIAGNOSTIC SYSTEM.