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I need to know what p0440 means - LeSabre Buick Cars & Trucks

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The technical meaning of the code is Evaporative Emission Control System Malfunction.

P0440 EVAP System No Flow can occur during the following conditions:
Fuel filler cap might be loose

  • Leak in the fuel tank, fuel filler neck or fuelsending unit 'O' ring.
  • PCM might have failed.
  • Purge vapor line might have clogged.
  • Purge or vent solenoid power circuit is open .
  • Fuel tank pressure sensor is damaged, disconnected or it failed.
  • Charcoal canister is filled with fuel or moisture.

Posted on Mar 16, 2011

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P0440 is an EVAPorative emissions code for a major EVAP leak - most common cause is a loose gas cap / bad gas cap seal. Make sure that the gas cap is fully seated, and try running the vehicle for a while - if that is the problem the light will clear itself. Other causes include a cut line, leaking charcoal canister, or leaking purge valve.

Posted on Mar 16, 2011

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P0440 EVAP system malfunction
evaporative system. probably a broken disconnected hose or bad selonoid.

Posted on Mar 16, 2011

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1 Answer

What are the probable causes of DTCs P0300, P0440, C1298, and C1245?


P0300 means you have a misfire in multiple cylinders
P0440 means there is a malfunction with the Evaporative Emission Control System.

The engine will be running very rough and potentially it could stop altogether.


You need to get the vehicle to a competent mechanic to diagnose the cause of the problems because there are a number of factors that could be causing these engine problems and the fault codes that are being generated as a result. .

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Po440 on my 2000 f150 flare side mean


Here is a summary of possible causes for the P0440 code. Good Luck
http://engine-codes.com/p0440.html

Feb 25, 2015 | Cars & Trucks

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What be the most common thing wrong with the car for it to have the code p0440


need to put your car on a scanner to properly diagnose your problems p0440 evap system,128 thermostate ,p0742 torque convertor,p0327 knock sensor. take your car to a good mechanic

Dec 02, 2014 | 2003 Chevrolet Impala

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What is po44o code mean and how do I fix it


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

Nov 22, 2014 | Cars & Trucks

1 Answer

P0440 code


You may need a repair shop. Code 440 means the computer has found a leak in the venting system for the gas tank.
The problem could be the gas cap, a rubber hose, or a valve between the tank and the vapor canister.

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1 Answer

I have a 2000 Lexus gs400 check engine codes 1126 and 440 came up what does that mean?


the p0440 and p1126? if so, the p0440 means Evaporative Emission Control System, and the P1126 means Throttle Position (Narrow Range) Sensor Circuit Malfunction.
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What does code P0440 mean?


This should help explain - http://repairpal.com/OBD-II-Code-P0440

Jan 10, 2011 | 2007 Dodge Ram Truck

1 Answer

I am getting P0440 EVAP Control System Malfunction for my Buick Century 1999 and need to know how to fix it thanks


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

Possible Solutions: with a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
  • Inspect the EVAP system for cuts/holes in tubes/hoses
  • Inspect for damaged or disconnected hoses around the Evap purge solenoid
  • Check and/or replace the sensor
  • Check and/or replace the purge valve
  • Have a professional use a smoke machine to detect leaks

Keep us updated.

Nov 15, 2010 | 1999 Buick Century

4 Answers

2000 Saturn SL2-" Service engine soon light" won't go out, even after having oil changed. Any ideas? Advance Auto's light says code: P0440.


You have to have one of the parts stores clear it. Did you check you gas cap. P0440 Is an emissions codes usually caused from a loose gas cap

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