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Q: What needs to be done? Check Engine light comes on. on 1999 Toyota Avalon

I had a garage replace the valve cover gasket on my '99 Toyota Avalon. The check engine light now comes on intermittantly. I took the avalon back to them, but it still comes on. What gives?
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hello ,, there is no codes for valve cover gasket. If the light wasnt on when you took it there , then they may have left something unplugged or loose. I would take it back and have them fix it .. If you can tell me what code is stored in the computer , i can probably help you more
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