Ignition Coil Guide & Diagnostic Information
The ignition coil transforms low battery voltage into the high voltage required to create an electric spark in the spark plugs.
Location on Vehicle
Mounted on top of each cylinder's spark plug on the cylinder head.
Typical Symptoms of Failure
- Engine misfire
- Limp mode
- Flashing check engine light
Associated Diagnostic Trouble Codes
A malfunction in the Ignition Coil can trigger the following OBD-II fault codes:
Estimated Replacement Cost
Typical cost to replace the Ignition Coil: $100 - $300 per cylinder (parts and labor).
Citations & Authority References
This technical part definition is cross-referenced with:
- EPA On-Board Diagnostics II Standard Specifications
- SAE J2012 Automotive Component Design Regulations