The most likely cause is an incorrectly wired iso plug on the stereo ,your vehicle has a Diagnostic com wire to the factory fitted stereo system if you short this wire it will cause various problems such as Mil lamp on etc. I would advise youto disconnect the new stereo and then have it fitted professionally by someone who knows which wire to disconnect to stop the Mil coming on.
Answers & Comments
The most likely cause is an incorrectly wired iso plug on the stereo ,your vehicle has a Diagnostic com wire to the factory fitted stereo system if you short this wire it will cause various problems such as Mil lamp on etc.
I would advise youto disconnect the new stereo and then have it fitted professionally by someone who knows which wire to disconnect to stop the Mil coming on.