Understanding Ignition Coils and Their Role in Reliable Engine Performance

Ignition coils convert the battery’s low voltage into the high voltage needed to ignite the air–fuel mixture inside your engine.
When an ignition coil begins to fail, the engine may misfire, run roughly, or lose power.

This MAP educational video explains how ignition coils work, what causes coil failure, and why proper diagnostics are essential before replacing any components.

At the Motorist Assurance Program (MAP), we aim to give motorists clear, trustworthy information about essential engine components.

Understanding how ignition coils support efficient combustion helps drivers make informed decisions when discussing performance issues or repair recommendations with a service professional.

Common signs of ignition coil problems include misfires, rough idling, poor acceleration, reduced fuel economy, or a Check Engine light, often triggered by related sensor readings.

Because these symptoms can also be caused by worn spark plugs, fuel delivery issues, or other ignition system components, accurate diagnostic testing is crucial to pinpoint the actual cause.

After watching this video, consider consulting a MAP-qualified service facility if your vehicle is experiencing performance concerns.