My Check Engine Light Came On While The Air Conditioner Was Running. And I Just Had A Vehicle Emission Test Done. Is There Any Way The Technician Could Have Disturbed The Computer?


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Mark Westbrook answered
Modern engines are electronically monitored and controlled by an ECM (Electronic Control Module). Essentially they are like a computer. Your ECM is sensing there is a problem, and you would need to take to a dealer which link the ECM to a diagnostic machine which should be able to retrieve an error code and help identify the cause.

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