Engine light on.

Hi Dear.

Hummer H2 - After clean the engine, the engine light also had light on when the car running. why had this problem ?
Does the car need to reset any programme ?
Where can I buy the reset programme manual ?
Welcome for any reply.
Thanks a lot.

was the light on before you clean your engine? or after cleaning the engine.
If during cleaning with the engine running water could have gotten a sensor.
you can go to any autozone center and they can clear the code.
good luck.