Possible causes

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

Tech notes

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

P0703 Information for specific makes

P0703 BMW
P0703 CHRYSLER
P0703 DODGE
P0703 FORD
P0703 HYUNDAI
P0703 INFINITI
P0703 JEEP
P0703 KIA
P0703 MAZDA
P0703 MITSUBISHI
P0703 NISSAN
P0703 SUBARU
P0703 SUZUKI
P0703 VOLKSWAGEN