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1999 Buick LeSabre Question: i have engine light on , again , it is tellin me a code of po 440 ?

 

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tuggboatt1962, Kennebunkport, ME, September 05, 2012, 11:07
 Rookie

ive been having problems with this car recently had simalar problems i have changed the silenoid purge v, and they also changed the fuel pump and fix some wires on the harnes, now i have this problem with this code? can someone help......

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  • Answer #1

    September 05, 2012, 14:03
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     Master

    Scanner should indicate where to start looking.

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  • Answer #2

    February 03, 2013, 06:36
     Rookie

    code po440 evaporative emissions control system malfunction....
    evaporative emissions leak ....dont get nervious its just the gas cap check it to make sure the rubber seal around the cap is not dry-rotted..I would just replace the cap with a OEM cap from your local parts store in witch the code should go away on its own after a few opening and closings of the gas cap ....

    hope this helps

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    tuggboatt1962, February 03, 2013, 17:42
     Rookie

    i did change the gas cap , an the light is still on ,, its been awhile now ?

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    pushrod, February 03, 2013, 20:38
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     Master

    If you decide to repair this have a shop perform a smok test to reveal leak.
    It has been awhile!

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    tuggboatt1962, February 04, 2013, 06:20
     Rookie

    thank you , for yr time my friend ..

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