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

I have engine light on , again , it is tellin me a code of po 440 ?

(1999 Buick LeSabre)
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......
2 answers & 3 comments
Popular Answer
on February 03, 2013
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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on February 03, 2013
i did change the gas cap , an the light is still on ,, its been awhile now ?
on February 03, 2013
If you decide to repair this have a shop perform a smok test to reveal leak.
It has been awhile!
on February 04, 2013
thank you , for yr time my friend ..
General Diagnosis
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on February 03, 2013
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
Sign in to reply
on February 03, 2013
i did change the gas cap , an the light is still on ,, its been awhile now ?
on February 03, 2013
If you decide to repair this have a shop perform a smok test to reveal leak.
It has been awhile!
on February 04, 2013
thank you , for yr time my friend ..
on September 05, 2012
Scanner should indicate where to start looking.
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