MIL /CEL light kicks on. CTSC installed. No problems till Christamas time. Has been a problem ever since. What else can i check?
Codes P1201, P1202, P1203, P1204,P1205, P1206, P0300, P1399
New plugs
new fuel filter
new coil packs
refurbished injectors
It's bothering me and frustrating me to...