My service engine soon light came on and the error codes were P0171 and P0174 stating probable causes "oxygen sensor defective, ignition misfire, fuel injector problem, engine mechanical condition". Now my truck is starting to shake bad while siting at a light in drive position and shakes while backing up, and it acts like it wants to shut off and a couple of times the tachometer started to go up and down. What do you think is the issue?
have the same problem?
Tuesday, October 26th, 2010 AT 2:31 PM