Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
It idles fine for us, but customer said it idled bad for him when it first came in it had a code of p0506, so I remover throttle body and cleaned it. Cleared the codes and took it on a drive cycle about 25 miles, just the p0171 and the p0174 came back. Idles fine and runs great. But I clear the codes with key on engine off and codes p0171 and p0174 come back without truck being started?