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  1. Toyota Prius Technical - Q & A
    Our 2003 Prius has 270K and gets a P0303 Misfire Detected error that kicks on the check engine light during a cold start-up. After the engine warms up for a few minutes it runs fine and the I can clear the code with it not reappearing unless it is cold (e.g. next morning). Mechanics confirmed it...
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