All we know is that the fuel pump relay is an important component of the fuel system in your Audi A4 that can give power to the fuel pump to build up fuel pressure in the rail. Thus, the fuel pump relay is automatically turned on when you turn on the ignition of the car. When the fuel pump relay of the Audi A4 is failed, you will notice the signs defined in the following video.
For more: https://emcnv.com/audi-repair-las-vegas/
For more: https://emcnv.com/audi-repair-las-vegas/
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Motor