How to reset check engine light with loose gas cap

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07-04-12, 07:55 AM

RQBuckman

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How to reset check engine light with loose gas cap

Gas cap was loose on RX 400h. Engine light came on. How do I reset the check engine light short of disconnecting the battery after tightening the cap.

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07-04-12, 09:04 AM

biff44

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I would...tighten the cap. If that is the probem, it will eventually go out.

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07-04-12, 01:35 PM

RQBuckman

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ok. I reset the gas cap and see what happens. thanks.

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07-06-12, 07:44 AM

lexus114

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Yeah, after so many start cycles if the ecm doesnt detect anything, it will go out. my recommendation is to buy an actron (or similar) code scanner/reader. Not a whole lot of money, and definitely worth it.