A malfunctioning or worn-out serpentine belt may trigger your car's CEL for various reasons. If the computer detects a problem with any of the accessories powered by the belt, or if it notices ...

If chirping persists after replacing the serpentine belt, the most likely causes are worn or dirty pulleys and/or pulley bearings, improper belt installation, or a cut-rate or defective belt.

So, from a dirty engine air filter to vacuum leaks and a damaged serpentine belt, here are six reasons ... but if you notice signs of worn-out spark plugs, like engine misfires and a rough or ...