Brake Lights Stay On — Possible Fault Codes
Found 1 fault code associated with brake lights stay on. Codes are sorted by severity — check STOP ENGINE codes first.
SPN 597 FMI 7
Brake Pedal Position Switch
Detroit Diesel DD15 • Component: Brake Pedal Position Switch / Air Brake System • J1939
⚠️ Diagnostic Note:
Symptoms can have multiple root causes. Always verify with a diagnostic scan tool before replacing parts. The fault codes listed above are possible matches for brake lights stay on based on SAE J1939/J1587 fault code definitions and OEM service documentation.