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The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the P0440 code.
Read more: http://engine-codes.com/p0440_chevrolet.html#ixzz3Jq4J1Kp1

Posted on Nov 22, 2014

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Posted on Jan 02, 2017

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Code po44o for a chevy s-10 pickup


this is a evaporative emissions code. which means there is a leak in the piping or something leading to the gasoline tank that is allowing fuel vapors to escape. More often than not the gas cap isn't tight or needs to be replaced. try these first

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I have a 2003 Dodge Ram 4.7 which recently had the spark plugs changed out. Ever since then it has been idling rough and has stalled out a couple of times. A fuel smell is more present now and the PO44O...


A code P0440 could mean one or more of the following has happened:

  • The gas cap is not installed or working properly
  • The purge solenoid has failed
  • The canister is plugged and not working properly

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Engine light on diagnosed PO44O dodge said probably the purge control solonoid. where is this located on a 2004 dodge neon?


Try checking the gas cap first off. 95% of the time, an EVAP code, (purge solenoids, or any EVAP code) could be caused by a lose gas cap, or a defective gas cap.

And I know on SOME neons, the evap canister purge solenoid is located on a bracket attached to the air cleaner. Hope this helped.

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Code po44o


this is a evap system leak code. have you checked gas cap to make sure it is tight? if so it is probably the vent solenoid hanging up.

Feb 22, 2011 | 2001 Chevrolet Cavalier

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Have a code PO44o on 2001 saturn sl2 replace the gas cap and the purge selenoid can that be the filter air o what else could be the problem?


Hello this symptom could be caused by a malfunctioning evaporator purge valve. The fuel cap is it a aftermarket brand or did it come from a GM dealer? I have experienced aftermarket fuel caps. Please keep in mind the evaporator test does not run if the fuel level is below 15% capacity or above 85% capacity, The 2001 L 200 has a 15.7 gal. fuel tank

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I have a 03 chy.pt cruiser with a code po44o


Error code P0440 =Evaporative Emission (EVAP) System. This site explains why & how fix the problem. http://www.obd-codes.com/p0440

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Service engine soon light. scan code po44o


Could possibly be an oxygen sensor better known as an O2 sensor

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