In 2009, a Toyota Prius with 109,000 miles experienced the check engine light turning on.

★ Top Answer

The check engine light in your 2009 Toyota Prius can come on for various reasons, essentially serving as a general warning for car issues. This light might indicate a loose fuel cap, malfunctioning sensors, a failing fuel pump, faulty oxygen sensors, or worn spark plugs, among other problems. The mileage, at 109,000, isn't necessarily related to the issue. To determine the specific cause, you should use an OBD-II scan tool to retrieve diagnostic trouble codes (DTCs). Once you have the code, you can search Vehicle History to understand its meaning. I'm sorry I couldn't offer more precise help, but there could be over a hundred possible causes.

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