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Take your car to a repair shop and have them diagnosis the problem. If you read and paid attention to the first sentence it will save you money. Yes, some parts houses will tell you what the code is to sell you parts but that does NOT mean that is what is needed to repair the problem. It could be as simple as a vacuum leak. The price of the diagnostics is worth getting it right the first time.

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Q: What do you service on buick when service engine light comes on?
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