Did you use an OBD2 scanner on your car to figure out why the check engine light is on, only to get the P0303 code? Here's what it means, plus possible fixes.

If you're a personal user, knowing how to read and interpret OBD codes is a trick that's well worth having up your sleeve for those times when the Check Engine light in your car suddenly comes on ...

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Once in diagnostic mode, the computer flashes the Check Engine or Service Engine Soon light (the specific name varies by year) in a fashion similar to Morse code.