Pontiac Problems? Ask a Mechanic for Answers ASAP
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Both of these codes are directly related. Both point to problems with the EGR Valve. One points to the position sensor and the other saying the performance is incorrect. On this vehicle, the EGR is all-inclusive, which means the position sensor is built internally. So, carefully inspect the electrical connector and wire harness for any loose, broken or damaged wires. If the inspection checks ok, replacing the EGR Valve should solve the problem. GM EGR Valves are fairly common fail items. The Valve is located on the top of the engine, near the throttle body. Dealer-suggested retail on the Valve is around $175. Aftermarket (like NAPA) about $100 cheaper. The labor Time Guide calls for a little over a half-hour to replace. Please remember to leave a rating using the 'stars' or click 'Accept'. A 5-star rating is much appreciated! Rating or accepting my answer does not cost you extra.
Hi! I noticed this thread was still open, so I wanted to check in and see how you made out? Did replacing the EGR Valve solve the problem? Any other questions you had? Was there something you wanted addressed that I may have missed in my answer? Did you find my answer helpful?