These codes can point to a ton of possible causes.Īnything ranging from a vacuum leak to a weak fuel pump can set these codes. When I retrieved the codes from this Chevy Traverse, I got two codes: In this case study, I used a TSB to solve this issue. There is a high chance that the problem has already been solved with information found in a TSB. ![]() In my experience, the manufacture will know about a problem with a vehicle before independent repair shops experience it. Some TSBs include recalls, updated information, software update numbers, and other valuable information. They are documents sent from the manufacture, in this case General Motors, reporting known issues with a vehicle. ![]() Verify the complaint - In this step, I make sure I can duplicate the problem with the vehicle.Ĭheck for codes - I use an advanced scan tool to retrieve the codes that have set the check engine light.Ĭheck for TSBs - TSB stands for “Technical Service Bulletin”. Whenever I diagnose a vehicle, I have a certain process.
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