Question about 2004 Hyundai Santa Fe

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Light came on after an hour and a half drive. Not

Light came on after an hour and a half drive. Not blinking. Someone suggested unscrewing gas cap and then rescrewing, but light still comes on after starting car, in park.

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If the light was flashing when it came on, then it means your engine is misfiring.

A solid light can mean anything. (bad gas cap to a bad transmission)

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain on. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially go

Posted on Oct 05, 2009

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Step 1 - Determine Your Type of Gas Cap Before acquiring a new one, think about whether you need a gas cap that locks to prevent a gas thief from stealing your gas. But keep in mind, if you put one of these caps on your car, your spouse or children who put gas in your car will need the gas cap key.
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elizabeth700:

Most likely a small evaporative leak will be from the gas cap. Replace the cap, then leave your battery unhooked for about a half hour to clear the code.

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There is a pressure sensor that is affected by the gas cap. If the cap was not on properly it will sense it and trigger the waring light.

Unscrew the gas cap and reinstall. Drive for a while and the light should go out.

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