C1938 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1938 – Malfunction In Front Active Stabilizer Control ECU Short Relay Power Supply IC

 

C1938 Possible Symptoms

 

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

 

C1938 Possible Causes

 

Faulty Front Active Stabilizer Control ECU,Faulty Front Active Stabilizer Relay,Faulty Rear Active Stabilizer Relay,Front Active Stabilizer Control ECU harness is open or shorted,Front Active Stabilizer Control ECU circuit poor electrical connection

 

C1938 Description

 

The Front Active Stabilizer Control ECU consists of a metal board, control board, power source IC, step-up circuit, Electrically Erasable Programmable Read-Only Memory (EEPROM), and other parts. If a problem occurs in the Front Active Stabilizer Control ECU and PIG power source circuit, a Diagnostic Trouble Code (DTC) is stored.