Asked in
Transmissions and Drivetrains
Ford Explorer
Check Engine Light
Chrysler LHS

Why won't your transmission shift when the check engine light comes on in your 99 Chrysler lhs?


User Avatar
Wiki User
September 25, 2008 2:10AM

In vehicles with an electronically controlled transmission, the computer will trip the "Check Engine" light when it detects a problem with the A/T. You have a transmission problem. Also, if the computer senses a serious problem with one of the main sensors, it may go into "Limp Home" mode where it uses calculated defaults instead of input from the sensors to control the engine. Check for trouble codes. On a 1999 LHS, with the car in off and in Park, turn the key on, off, on, off, and then on. Look at the odometer, the trouble codes should display there. Write them down then look them up on the net with a search engine or shop manual if you have one.