My wifes 97 Jetta has had this code twice now in the last year. Both times it would come on and clear it self. I did the spark plugs, wires, cap and rotor 20K ago. Everything is tight and the plug looks ok. Do you think it could be a bad injector? I was told that this could happen. I do run FP60 Plus every fill up. What about using no name brand gas stations? Im wondering if something got into the injector...what are the odds of that happing twice though.