Faulty Fuel Cut-Off Valve
Fuel Cut-Off Valve harness is open or shorted
Fuel Cut-Off Valve circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Fuel Cut-off Valve Open/Short To Ground is the generic description for the P1538 Audi code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1538 Audi OBDII code.