Disconnect the negative battery connection for 30 minutes and the light will reset. However it will come back on if you have not repaired the problem that caused it to come on in the first place.
If you have fixed the problem it should reset itself. If not, the light will stay on.
reset service engine light
A reset Engine Service Light comes on when an issue comes up with in the engine. This light can be reset by a tech or by fixing the problem.
reset service engine light on BMW 325
You have to reset it with a OBC scanner :-)
How do I reset the service engine light on a 2003 Chevy Trailblazer?
The check engine light on a 1999 Cadillac DeVille can be reset by disconnecting the battery for 30 seconds. The light will immediately come back on if the problem still exists.
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