C1426 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C1426 – Stop Light Switch Off Stuck Malfunction

 

C1426 Possible Symptoms

 

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

 

C1426 Possible Causes

 

Blown Stop Light Switch Fuse,Faulty Stop Light Switch,Stop Light Switch harness is open or shorted,Stop Light Switch circuit poor electrical connection,Faulty Skid Control ECU

 

C1426 Description

 

The Skid Control ECU receives stop light switch signals and uses them to determine whether or not the brakes are applied. The Skid Control ECU has a detection circuit that it uses to detect a short in the stop light input line, or the ground line of the stop light circuit with the stop light switch on (brake pedal depressed). If the Skid Control ECU detects a short in this circuit, it will store the C1426 code.