Can You Drive With an Engine Misfire?
Drive with caution (short trips only)Caution: You may be able to drive a short distance with a mild misfire, but it's not safe to keep driving like that. Get it diagnosed quickly—especially if the check engine light is flashing.
How far can you drive?
Only to the nearest shop if the misfire is mild and the check engine light is steady. If the check engine light is flashing, do not drive another mile—call a tow immediately.
Stop driving immediately if you notice these signs
- Check engine light is flashing (not steady)—stop immediately
- Engine is shaking violently at idle or under acceleration
- Strong fuel smell from the exhaust
- Sudden, significant loss of power while driving
- Engine stalls at a stop or under light load
What happens if you ignore it?
Unburned fuel from the misfiring cylinder enters the catalytic converter and can melt its ceramic substrate, turning a $100–$300 ignition coil or spark plug replacement into a $400–$2,400 catalytic converter replacement.
Typical repair cost: $100–$2400
When to call a tow instead of driving
- Check engine light is flashing
- Engine is shaking severely at idle or speed
- Power loss prevents safe highway driving
- Misfire is accompanied by smoke from exhaust or engine bay
Frequently asked questions
What causes an engine misfire?
Most commonly a failed ignition coil, worn spark plug, or a clogged fuel injector. Less common causes include low cylinder compression, a vacuum leak causing a lean condition, or timing chain wear on higher-mileage engines.
Will driving with a misfire damage the engine?
Yes. Beyond catalytic converter damage, a misfiring cylinder introduces raw fuel into the crankcase oil, diluting it and reducing lubrication effectiveness. Extended driving with a misfire accelerates engine wear throughout.
How do I know which cylinder is misfiring?
A code reader will show P0301, P0302, P0303, etc., where the last digit is the cylinder number. A random misfire (P0300) means multiple cylinders or no consistent pattern—often a fuel delivery or compression issue rather than a single ignition component.