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Wifes car throws SES light...help.....!

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Old Jun 25, 2007 | 12:02 AM
  #1  
z28landon's Avatar
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Default Wifes car throws SES light...help.....!

Alright so I just started up my wifes car, 2000 Pontiac Grand Am V6....and I get the SES light of death....
I plug in my Diablosport tuner and get a code as follows.

"P 0440 EVAP Control System, Malfunction"

WTF?
I restarted the car a few times, and even tried to delete this code and I got another code that says Incompatible format????

Anyone know what the deal is? is it possible a sensor went out...or even just a stupid glitch...My wife said as of this morning the SES light was NOT on at all....so it was JUST tonight when it started...I dunno weird.. the car runs fine though...
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Old Jun 25, 2007 | 01:50 AM
  #2  
intense3123's Avatar
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Maybe your gas cap wasn't fully closed. That can throw an EVAP code
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Old Jun 26, 2007 | 10:02 AM
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GregAbell60143's Avatar
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From: Itasca, IL
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True about the gas cap. Check the rubber seal on yours - it might be dried out and cracked. If so, get a new one from the dealer. It could have also been that the cap wasn't put on tight enough. This code can be a bitch to track down, since it could be a leak in the system as small as a pin hole. The dealer has a machine to push smoke through the system, to try and locate the leaks.
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