If the light keeps coming on for the knock sensor, I think you should check the sensor itself. It is most likely bad. As far as a tune up, if it has 140K on it, it's due but I have some good news, the 07 has a timing chain (not a belt) so that is a good thing. I really feel the sensor is bad. Chances are it has an internal open circuit if the light comes right back on. If you can, check it for continunity to see if power will go through it.
Tuesday, March 1st, 2011 AT 12:34 AM