Faulty Air Injection Pump Relay
Air Injection Pump Relay harness is open or shorted
Air Injection Pump Relay circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Secondary Air Injection Circuit Short To Ground is the generic description for the P1451 Audi code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1451 Audi OBDII code.