Electronic control unit: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Engine Control Unit. According to the values shown by different sensors, it estimates certain parameters such as the amount of air and fuel that need to be supplied, the amount of time needed to start the car, the pressure of the turbocharger, and any other key aspects to maximize its performance and efficiency with the least amount of contamination possible.
I pulled out the relays in my 2012 Ford fusion and when I put them back and now my car won't start and my security lock is flashing I don't know what to do everything I've tried doesn't work