Guides
Car problems, explained simply.
What that noise or warning light usually means, whether it’s safe to drive, and what to tell your mechanic. Written from the problems people bring to OnlyMech every day.
Brakes
- Why do my brakes grind when I stop?A grinding noise when you brake usually means the pads are worn down to metal. What causes it, whether it’s safe to drive, and what the repair involves.
- Why do my brakes squeal?Squealing brakes are often harmless moisture or dust, but a steady squeal can be the wear indicator telling you the pads are thin. How to tell which.
Engine
- Check engine light and a rough idle: what does it mean?A check engine light with a shaky idle usually points to a misfire, a dirty throttle body or an air leak. Flashing or steady, what it means and what to do.
- Code P0420: is it really the catalytic converter?P0420 means the catalytic converter isn’t cleaning exhaust well enough. It’s often the converter, but check misfires, leaks and sensors first. Here’s how.
Warning lights
- Headlight warning on the dash, but the headlights work?A headlight or lamp warning can stay on even when both headlights shine. The usual causes: a different bulb out, a failing LED, aiming or a bad connection.
- Collision warning light on after a bumper or windshield repair?After a front bumper, grille, windshield or alignment job, a collision or pre-crash warning often means the radar or camera needs calibrating. What to know.