Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0351: Ignition Control Circuit: Description
Enhanced ignition system uses Crankshaft Position (CKP) sensor to provide a timing input to Powertrain Control Module (PCM). Ignition Control (IC) spark timing for each cylinder is based on this input. PCM provides ignition timing signal to Ignition Control Module (ICM) to control ignition coil. Each timing pulse detected by ICM allows ICM to energize ignition coil. A large secondary ignition voltage is induced in secondary coil by primary coil. This high voltage is switched to correct spark plug by the distributor. DTC will set if PCM detects an unusually high or low voltage on ignition timing signal circuit.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.