Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is***** most likely means fuel tank pressure sensor has failed or wiring has shorted. Inspect wiring good and if all looks ok replace the fuel tank pressure sensor. You can monitor voltage at sensor with it unplugged, if it maintains 5v that would mean wiring is good. Here is diagram to show rub points, let me know if you have more questions. Thanks.