P0703 OBD Code Definition:
P0703 Brake Light Switch Plausibility
P0703 OBD Code Description:
OBD Code P0703
Brake Switch “B” Circuit
What’s mean?
OBD2 Code P0703 Definition:
Engine Control Module (ECM) detected accelerations and decelerations with no brake switch change
Symptoms
Possible sumptoms of P0703
– Engine Light ON (or Service Engine Soon Warning Light) – Brake lights inoperative
Possible Causes
Possible causes of P0703
– Open or short brake switch circuit – Poor brake switch connection – Misadjusted brake switch – Damaged brake switch
Possible Solutions
Check if the stop light works with the brake pedal, if the brake lights are inoperative, replaced or adjust the brake switch.