I have a 2002 grand prix with the 3.1 sfi. I have had nothing but problems with this car lately. My tach does not work & my tcc light is on. My check engine light is also on. I get code PO336 which is the crank sensor. I replaced both crank sensor but the PO336 code keeps coming back. Does my tcc or tach have anything to do with this code? A friend of mine said I could have a pin hole in a vacuum line someplace. Anybody have an idea whats wrong with this car? Im about ready to set fire to it & walk away. Thanks for your time.
