P0703 Brake Light Switch Plausibility

Possible causes

– Faulty Brake Switch
– Misadjusted Brake Switch
– Brake Switch harness is open or shorted
– Brake Switch circuit poor electrical connection

Tech description

Check if the stop light works with the brake pedal, if the brake lights are inoperative, replaced or adjust the brake switch.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Brake lights inoperative

P0703 Description

Engine Control Module (ECM) detected accelerations and decelerations with no brake switch change