How to eliminate the EPC light on an old Jetta?
1 Answers
Intake system troubleshooting, using qualified fuel, cleaning the throttle body, etc. Remove carbon deposits from related components. If the throttle body is dirty, it should be cleaned. If the brake lights are not working, inspect the brake switch and wiring. Re-flash relevant ECU data (this applies when other faults have been resolved but the issue persists). Other potential faults cannot be ruled out. Specific repairs should be based on actual vehicle diagnostic results.