Engine Misfires
Urgency: HighAn engine misfire occurs when one or more cylinders fail to fire properly. You may feel a jerking sensation, loss of power, or hear popping sounds from the exhaust. Misfires can be caused by ignition problems (spark plugs, coils), fuel delivery issues, or mechanical problems (low compression). Persistent misfires can damage the catalytic converter.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonPossible Causes
- Worn spark plugs
- Failed ignition coil
- Clogged fuel injector
- Vacuum leak
- Low fuel pressure
- Worn valve seals
Related OBD-II Codes
When to See a Mechanic
See a mechanic as soon as possible. Continued driving with misfires can damage your catalytic converter, which is an expensive repair.
Need Help Diagnosing This Symptom?
Describe your symptoms to our AI mechanic and get personalized diagnostic guidance for your specific vehicle.
Start AI ChatAffiliate Disclosure: This page contains affiliate links. If you purchase products through these links, we may earn a small commission at no additional cost to you. This helps us maintain this free resource. We only recommend products we believe will help you diagnose and repair your vehicle. Prices shown are estimates and may vary.