B2458 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2458 – Auxiliary Heater Overheat Sensor Circuit Short to Ground

 

B2458 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2458 Possible Causes

 

Faulty Auxiliary Heater Overheat Sensor,Auxiliary Heater Overheat Sensor harness is open or shorted,Auxiliary Heater Overheat Sensor circuit poor electrical connection

 

B2458 Description

 

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