B2451 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2451 – Auxiliary Heater Fuel Pump Circuit Short to Ground


B2451 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B2451 Possible Causes


Faulty Auxiliary Heater Fuel Pump,Auxiliary Heater Fuel Pump harness is open or shorted,Auxiliary Heater Fuel Pump circuit poor electrical connection


B2451 Description


The Powertrain Control Module (PCM) monitors the Auxiliary Heater Fuel Pump. The PCM sets the OBDII code when the Auxiliary Heater Fuel Pump is not to factory specifications.