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International Automotive Technicians Network
Re: Can't erase codes
Posted to HD/Fleet Forum on 4/8/2021

I do not work on Ford's. What happens on a D max when this happens is the reductant lamp will be lit and the vehicle will be in warning level five and speed reduced to 4 MPH. After the system is fixed ( on a GM ) you have to perform a test or two with the scan... Login to read more.