My vsc trac light and check engine light has come on. How do you turn these off. I had it scanned and it said I have a vapor leak. Put on a new gas cap but the lights are still on. It also said something about speed sensor. How do I fix this.
Amazed at the amount of people having this problem and no manufacturer fixes! These lights seem to come on after three hours of highway driving. They can be reset or at times, go off by themselves. Less driving time and the lights stay off...then back on after three hours of highway. Tried a new gas cap and cleaning the MAF sensor to no avail. Parts store once pulled a code of P0420. Any ideas out there? Seems like even many mechanics are guessing when it comes to this system. Thanks.