What causes the "check engine light" to remain on?

Question

Also, the gear shift was shift after driving thru water

Answer 1

Hi there,

The check engine light remains on when there is a problem with one of the monitored systems on the car. Since you drove through high water, it is possible there is an issue with the transmission. The control module for the transmission can also turn the check engine light on. You need to have the codes read to determine the area that has the problem.