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.
Engine Ignition
This vehicle uses a coil-on-plug electronic ignition system. The coil-on-plug ignition system consists of the following components:
- powertrain control module (PCM) (12A650)
- crankshaft position (CKP) sensor (6C315)
- ignition coil-on-plug
- spark plugs (12405)
The PCM and the CKP sensor are also part of the electronic engine controls system. For additional information, refer to ELECTRONIC ENGINE CONTROLS .
Eight separate ignition coils:
- are controlled by the powertrain control module (PCM) (12A650).
- are mounted directly above each spark plug (12405).
- are controlled by the powertrain control module for the correct firing sequence.
The spark plugs:
- change the high voltage pulse into a spark which ignites the fuel and air mixture.
- originally equipped on the vehicle have a platinum-enhanced active electrode for long life.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.