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Home >> Hyundai >> 2023 >> Tucson Plug-In Hybrid Limited >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System (PHEV) >> Troubleshooting

Ignition System (PHEV): Troubleshooting

Symptom Suspect area Remedy
Vehicle indicates Ready in dash, but engine will not run when requested by the HPCU (HEV module). Ignition coil Inspect ignition coil, or replace as required
Spark plugs Inspect spark plugs, or replace as required
Ignition wiring disconnected or broken Repair wiring, or replace as required
Rough idle Ignition wiring Repair wiring, or replace as required
Ignition coil Inspect ignition coil, or replace as required
Engine hesitates/poor acceleration Spark plugs Inspect spark plugs/replace as required
Ignition wiring Repair wiring, or replace as required
Poor mileage Spark plugs Inspect spark plugs/replace as required