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.
Have the problem that caused the check engine light to come on repaired. They will reset the light with an OBD2 scan tool. The light will just come back on if the problem is not repaired.
Disconnect the battery for 30 seconds
The check engine light is reset with a scan tool after repairing the cause of the fault.The check engine light is reset with a scan tool after repairing the cause of the fault.
The check engine light has to be reset with a OBD scan tool
You reset the check engine light with a scan tool after repairing the failure.
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Have vehicle scanned to determine the problem - usually a problem in the emission control system
The check engine light comes on in a car when there is a problem with the engine. It will go off or be reset when the problem is fixed.
There is no reset button for the check engine light. It must be reset with an OBD scan tool.
You need a scan tool to properly reset the check engine light.