Why are Check Engine, VSC Trac and Trac Off lights all on?
What is your question?
The Check Engine, VSC Trac, and Trac Off lights are all on. Codes are P0420, C1201, C1223, C1256, and C1336. Vehicle seems to run fine. Just got it so don't know the history on it. Any help on where to start?
2 Replies
PO420 is indicative of a failed catalytic converter - as for the other codes you can find the definitions and detailed information @ https://www.engine-codes.com/ The other system (VSC) rely on proper engine operation to function properly - likely the reason for other lights.
Gas cap was loose, believe it or not. Tighten the gas cap AND disconnect the battery for 30 plus seconds. Reattache the battery and start the car. It worked like a charm, unless there is a deeper problem. I just did it after reading it on a forum here.
Similar Questions
See more 2003 Toyota 4Runner QuestionsWhat are the best Toyota repair shops?
Tuffy Tire & Auto Service Center - Grandview
Excite Auto Repair & Towing
All In Auto Service
Tuffy Tire & Auto Service - Grove City
Blackstone Complete Auto Care
Boyd's Tire & Service - Columbus
Tuffy Tire & Auto Service Center - Grandview
Excite Auto Repair & Towing
Clean the positive terminal. Take it off and put into vinegar for about 30 minutes and rinse and then use a wire brush to clean off as much corrosion as you can and it will fix the problem. Happened to me twice already. Don’t freak out. Just keep a bottle of vinegar and/or a wire brush in the car whenever the car does the same thing. I have an 05 Scion xB