Whether you know a lot about cars or nothing about them, it's never fun to see the check-engine light—also known as a malfunction indicator light (MIL). This is your car trying to tell you it has ...

Some 2007-08 Grand Cherokee and Commander SUVs with 5.7-liter engines may turn on the Check Engine light and store trouble code P0420 and/or P0430 in PCM memory. Jeep says the problem typically ...

It happens at the worst time - stuck in traffic or a long road trip - when you see that check engine light flick on. Here's why it may keep returning.