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What are the probable causes of DTC P0440?

Engine light is on and that code p0440 always pop up

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  • Malissa Dickerson Jan 29, 2016

    Hi Robert Wyatt, I want to help you with your question, but I need more information from you. Can you please add details in the comment box? year, make model, engine size?



6 Suggested Answers


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  • 2 Answers


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Posted on Jan 02, 2017



  • 72 Answers

SOURCE: p0442 p0456 p0440 dodge durango

Buy a used engine from a reputable wrecking yard. That is the least expensive soulution. Then..........teach your girlfriend, where the dip-stick is!

Posted on May 27, 2009

66 chrgr

mike loshbough

  • 1011 Answers

SOURCE: p0442 p0456 p0440 dodge durango

replace your evap solenoid this should fix it.

Posted on Jun 21, 2009


  • 12 Answers

SOURCE: I have an 03 Ram 1500, engine light is on, I had

p0440 - Evap. system performance (this could be something as simple as not turning the gas cap several times after you fill up.

p0456 - Evap leak monitor Small leak detected. - Could be related to the previous code.

p2106 - Throttle Actuator Control System - Forced limited power : This one you might have noticed the vehicle running rough, overdrive not working properly and cruise control will not set.

p2175 - Throttle Actuator Control System - Low airflow detected.

What you might want to try first is have the codes cleared which most auto parts stores offer this for nothing (unless you have a programmer then you can do it yourself). Pour in some fuel injector cleaner into your gas, put a new air filter on. And when you fill up your gas tank, crank the cap several times when you put it back on.
See if the codes come back on after that.

Posted on Nov 22, 2009

James Young

  • 4044 Answers

SOURCE: engine lite on two codes p0440 p0522 what are

p0440-Evaporator Emissions Control Malfunction. P0522- Engine Oil pressure low. Replace the Gas cap and double check your engine oil level to make sure your not low. Reset the computer and see if the codes return. If your oil level is good when you check it you may have a problem with your oil pump.

Posted on Jul 22, 2010

Testimonial: "awesome will take into shop see what they say thanks "


  • 54 Answers

SOURCE: Getting a check engine light on a 2002 Dodge for P0440

Easy fix? Replace your gas cap.

Posted on Nov 16, 2010

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What will cause a p0440 code to appear on 2000 chevy silverado?

What engine does it have ?
Engine Controls - 4.3L
Engine Controls - 4.8L, 5.3L, and 6.0L
DTC P0440 Evaporative Emission (EVAP) System
Circuit Description
The evaporative system includes the following components:
• The fuel tank
• The evaporative emission (EVAP) vent solenoid
• The fuel tank pressure sensor
• The fuel pipes and hoses
• The vapor lines
• The fuel cap
• The evaporative emission canister
• The purge lines
• The EVAP purge solenoid
The evaporative leak detection diagnostic strategy is based on applying a vacuum to the EVAP system and monitoring the vacuum decay rate. The vehicle control module (VCM) monitors the vacuum level via the fuel tank pressure sensor input. At an appropriate time, the EVAP purge solenoid and the EVAP vent solenoid turn ON, allowing the engine vacuum to draw a small vacuum on the entire evaporative emission system. If a sufficient vacuum level cannot be achieved, a large leak or a malfunctioning EVAP purge solenoid is indicated. The following conditions can cause this problem:
• A disconnected or malfunctioning fuel tank pressure sensor
• A missing, malfunctioning, improperly installed, or loose fuel cap
• A disconnected, damaged, pinched, or blocked EVAP purge line
• A disconnected or damaged EVAP vent hose
• A disconnected, damaged, pinched, or blocked fuel tank vapor line
• A disconnected or malfunctioning EVAP purge solenoid
• A disconnected or malfunctioning EVAP vent solenoid
• An open ignition feed circuit to the EVAP vent or purge solenoid
• A damaged EVAP canister
• A leaking fuel sender assembly O-ring
• A leaking fuel tank or fuel filler neck
Any of the above conditions can set a DTC P0440.

Apr 27, 2018 | Cars & Trucks

1 Answer

What are the probable causes of DTC P0440?

Code 440 is for a general failure of the EVAP system which is the vent system for the gas tank.
The engine computer checks the system every few minutes and if it detects a leak the check engine light comes on. The light tells the driver there is a problem and to get it checked out.
You would need a shop manual to get all of the testing procedures for the system and you would need to check for leaks.

Apr 01, 2016 | 2008 Chrysler Aspen

1 Answer

Po440 on my 2000 f150 flare side mean

Here is a summary of possible causes for the P0440 code. Good Luck

Feb 25, 2015 | Cars & Trucks

1 Answer

I have 2 problem codes for my 2003 pt cruiser 1) 9 and 2) p0440 what does this mean

Hi there:
DTC P0440 - Evaporative Emission Control System Malfunction

This is caused by a vapor lean in the fuel system. A loose or not sealing gas cap can cause the problem.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Aug 21, 2012 | Chrysler Cars & Trucks

1 Answer

Solution for 1999 chevy cavalier code p0440

There has been a service bulletin isued for that code. I have run into this before, also the wires comming out of the connector. That would bethe first thing to check. Here is what the bulletin states. Emissions - SES Lamp ON/DTC P0440 (EVAP) SetNotesFile In Section: 06 - Engine/Propulsion SystemBulletin No.: 02-06-04-044Date: August, 2002TECHNICALSubject: Service Engine Soon (SES) Light Illuminated, DTC P0440 Set (Replace Fuel Tank Evaporative Emissions Control System (EVAP) Vent Solenoid Harness) Models: 2000-2002 Chevrolet Cavalier2000-2002 Pontiac Sunfire ConditionSome customers may comment that the SES light is/was illuminated.A technician may find DTC P0440 is stored in the PCM.CauseThe EVAP solenoid harness may be misrouted around the rear antilock brake (ABS) wire harness causing a chaff/damage to the EVAP vent solenoid harness, setting DTC P0440.CorrectionFollow the service procedure below to diagnose and correct this condition.1. Install a Tech 2 scan tool and select the appropriate vehicle. Verify that a DTC P0440 is stored in the PCM. 2. Raise the vehicle on a hoist. Refer to Lifting and Jacking the Vehicle in General Information (SI Document ID # XXXXX).


Locate and inspect the EVAP vent solenoid harness (3) routing. The harness may be routed below the ABS wiring harness (4) at the right rear corner of the fuel tank, causing stress on the EVAP solenoid harness (3).


4.Disconnect the EVAP vent solenoid harness (3) from the EVAP vent solenoid (2) and connector C313 (1). Discard the EVAP vent solenoid harness (3).

5.Connect the new EVAP vent solenoid harness (3), P/N 22687059, to the EVAP vent solenoid (2), route the harness above the rear ABS harness (4) and connect the EVAP vent solenoid harness (3) to connector C313 (1).

6.Lower the vehicle.

7.Clear the DTC's with the Tech 2 scan tool.

If all of the wires are good you will want to check for any leaks in the evap system.

Hope helps.

Apr 09, 2012 | 1999 Chevrolet Cavalier

1 Answer

What does code t0440 mean on a 2003 malibu

Do you mean "P0440"?

Diagnostic Test Code (DTC) P0440 has a generic description of "Evaporative Emissions System Large Leak".

The MOST COMMON cause of this code is refueling the vehicle with the engine running or not getting the fuel cap on correctly after refueling.

The Powertrain Control Module (PCM) checks for leaks in the Evaporative Emissions (EVAP) system using the data provided by the Fuel Tank Pressure (FTP) sensor. It will check the FTP sensor data, then close the EVAP Vent Valve and open the Canister Purge Valve to apply vacuum to the EVAP system. After a period of time, the PCM will again check the FTP data to see if the fuel tank pressure has dropped within a specified amount. If there is very little or no change in the FTP data, DTC P0440 sets.

Other possible causes for this code are:

> Defective FTP sensor (VERY RARE)
> EVAP Vent valve stuck open
> Canister Purge Valve stuck closed
> Large leaks or cracks in any of the EVAP system hoses and/or lines and/or components, including the fuel tank and the fuel filler neck and the EVAP canister

Please note that this code indicates a MECHANICAL failure of the system. This is NOT a circuit fault that would involve broken/shorted wires, blown fuses, etc..

Nov 12, 2011 | 2003 Chevrolet Malibu

2 Answers

2002 Chevy Trailblazer w/101,000 mi has the P0440 OBD II Code. Just replaced the plugs with Iridiums @ 100K, all connections are good and gas cap is seated properly . . . help!!!

i have 2003 trailblazer ltz 153 000 mileage i have code po440 .i changed gas cap and turned off the chech engine light... i made 300 miles and it was good and today morning i drove a mile and light turned on ..... what do i have to fix ...thanks

Mar 22, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

My check engine light is on and a diagnosic scan showed up with P0440 first and then when redone a couple of months later, the scan showed up P0440 and P1665 (O2 sensor). Would the O2 sensor cause the...

never had this sort of problem with the older cars,emmisionwiz is keyed up with sensors hope he answers this for you.sorry i couldnt be of more help but ask me about a 1960s ford anglia or a morris minor ??

Mar 04, 2009 | 1998 Oldsmobile Intrigue

1 Answer

1999 pontiac sunfire code p0440

P0440 - Evaporative Emission (EVAP) System, this code is most often caused by leaving the gas cap loose, or off.

Sep 21, 2008 | 1999 Pontiac Sunfire

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