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.
Circuit Description
The 2.0L and 2.5L engines use a coil-on-plug design. The PCM controls 4 (2.0L) or 6 (2.5L) individual coil assemblies using reference pulses from Camshaft Position (CMP) sensor and other sensor inputs. Battery voltage is applied to ignition coil assemblies when ignition switch is in ON or START positions. The ignition control module within each coil assembly toggles primary windings, inducing a high voltage in secondary windings. The high voltage induced in secondary windings of ignition coils is applied through coil boots to spark plugs.
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.