B1253 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1253 – Air Temperature Internal Sensor Circuit Short To Ground

 

B1253 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1253 Possible Causes

 

Faulty Air Temperature Internal Sensor,Air Temperature Internal Sensor harness is open or shorted,Air Temperature Internal Sensor circuit poor electrical connection,Faulty Electronic Automatic Temperature Control (EATC) Module

 

B1253 Description

 

The Electronic Automatic Temperature Control (EATC) Module monitors the Air Temperature Internal Sensor. The EATC sets the OBDII code when the Air Temperature Internal Sensor is not to factory specifications.