There really isn't anyone more experienced than the Isuzu dealership to diagnose your vehicles check engine light problem. I recommend you speak with the shop supervisor and make sure they are not making unnecessary repairs. If they can absolutely not find the fault, you should request your money back, advising them that you will ask the BAR to investigate why they have been unable to locate the problem; after you've spent $2000 dollars with them.
From that point you should probably have your Isuzu diagnosed by the state smog check referees office. They often are not experts with a specific vehicle model, but they are emission repair experts and can contact the dealership for specific questions if they need to.
posted by SmogTips Support
