Car Shaking at Idle or at a Stop? Common Causes
If the car shakes or runs rough while stopped at a light or in park, the cause is usually in the engine, not the tires. Common culprits are misfires, vacuum leaks, and worn engine mounts.
If the check engine light is flashing while the car shakes, the engine is likely misfiring. Avoid hard acceleration and have it checked soon, since continued driving can damage the catalytic converter.
Quick checks you can do safely
What's usually behind it
Still not sure? Let us take a look.
These checks can point you in the right direction, but a proper diagnosis needs the right equipment. We'll find the actual cause and explain it before recommending any work.
Car Shaking at Idle or at a Stop: common questions
Why does my car only shake when stopped?
At idle the engine runs at its lowest speed, so a misfire or a worn mount is easiest to feel. If it smooths out once you're moving, the engine is the likely source rather than the tires.
Can bad spark plugs cause shaking?
Yes. Worn plugs or a failing coil are among the most common causes of a rough idle, and they're usually a straightforward repair.
This guide is general information, not a diagnosis. Every vehicle is different, and our technicians will confirm the cause before recommending repairs. Serving Mission Viejo, Rancho Santa Margarita, Laguna Hills and nearby communities.