I have been trying to figure out this problem for 18 months now. Truck can't pass smog. I used to also get P0306, but I just drove it 12 miles right now and 174 is the only code. No 6 seems to be firing now since it doesn't rumble anymore in reverse at creep. I am including a snapshot of the PID list as of now. It is severely lean on bank2 but I have sprayed carb cleaner all over without pegging the O2's at 1 v. Could the EGR be passing exhaust gas due to defect/damage? How can I test this and how could it not throw an EGR code? Thanks for any suggestions.
Tuesday, July 8th, 2014 AT 7:01 PM