If you mean a Check Engine light, then yes, they can be reset. Some can be reset by disconnecting the negative battery cable for 5 minutes. Others will require an OBD2 scan tool to reset the light.
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.
There is no reset.
You reset the check engine light with a scan tool after repairing the failure.
Sorry It Will Not Reset It
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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.
There is no reset button for the check engine light. It must be reset with an OBD scan tool.
The check engine light has to be reset with a OBD scan tool
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