B2540 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2540 – Aux A/C Mode Position Reference Circuit Short to Battery

 

B2540 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2540 Description

 

Aux A/C Mode Position Reference Circuit Short to Battery is the generic description for the B2540 code, but the manufacturer may have a different description. Currently we have no further information abouth the B2540 OBDII code.