check engine light comes on whenever gas is below half full? - Club Lexus Forums


check engine light comes on whenever gas is below half full?

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Old 04-26-08, 11:18 PM   #1
Antphilli
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Default check engine light comes on whenever gas is below half full?

nothing is wrong with the car.. it is a 99 with 52 k, check engine light comes on when gas is below half.. any ideas? thanks again
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Old 04-27-08, 07:09 AM   #2
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Welcome to the Club. I used to have this issue when I ran my RX down in Mexico and attributed this to the bad gas there bringing contaminants into my tank. I eventually got rid of it (mostly) from running a bottle of Redline Fuel System Cleaner in my tank, but even then it popped up in successive months. I used to have to pull the battery cable to reset this issue.
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Old 04-27-08, 08:10 AM   #3
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Exclamation check engine light

thanks... you think this is anything i should worry about as far as costly goes? thanks again for the help
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Old 04-27-08, 12:42 PM   #4
amf1932
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Quote:
Originally Posted by Antphilli View Post
nothing is wrong with the car.. it is a 99 with 52 k, check engine light comes on when gas is below half.. any ideas? thanks again
Check your gas cap gasket. If it's leaking air into the tank than sometimes it'll trigger your check engine light.
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Old 04-27-08, 02:27 PM   #5
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Originally Posted by amf1932 View Post
Check your gas cap gasket. If it's leaking air into the tank than sometimes it'll trigger your check engine light.
That could be. Would be interesting to see the code on the CEL to see if it is in the P04XX range or is the P0171 error that is more commonly attributed to this.

This issue with the light is not something to worry about for the moment if you all you are seeing is the CEL coming on when it does and nothing else.
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Old 04-27-08, 07:59 PM   #6
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thanks.. you are guys are great.. appreciate it
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