C0138 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C0138 – Base Brake System Pressure Circuit/Sensor Low

 

C0138 Possible Symptoms

 

Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)

 

C0138 Possible Causes

 

Faulty Electronic Brake Control Module (EBCM),Electronic Brake Control Module (EBCM) harness is open or shorted,Electronic Brake Control Module (EBCM) circuit poor electrical connection

 

C0138 Description

 

The Electronic Brake Control Module (EBCM) uses an input from 2 brake fluid pressure sensors to enhance ABS braking and vehicle stability if equipped.