Question about 1996 Chevrolet Blazer

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Service engine soon. scan code p0440 - 1996 Chevrolet Blazer

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  • Anonymous Aug 05, 2008

    Service Engine Soon/P0440

  • symera Dec 06, 2008

    I have the same problem. It has something to do with the Gas Cap Sensor. I have had this problem for over 5yrs.



    My solution was: disconnect the battery overnight.

    Then when you hook it back up the check engine light is no longer on.

    However, the first time you put gas in (or take the gas cap off for any reason) the light will come back on the next time you crank it and will stay on. I have even failed emmission a couple of times. There is nothing actually wrong - it is just a faulty sensor. I just disconnect the battery before I go to emmissions each year.

  • jennifer rivera Jul 08, 2013

    i should worry or what

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This is an evap small leak code and is most likely caused by the gas cap. The computer and evap pressure sensor determines if the evap system has any leakage and that is why the code is setting. Most Blazers have a plastic strap that is attached to the cap, make sure that the strap is not getting caught under the cap and preventing a good seal. The rubber seal on the cap may also be damaged so check that too. Also when you get gas, over the years the inside of the filler tube gets knocked by the nozzle and that damage could prevent good sealing as well. Other issues with this code could be in the evap system components such as the evap canister, related solenoids, and hoses. This would have to be checked at a shop for you. The first place to check is the gas cap itself and even replace it you suspect it since they are not expensive and you can do this yourself. As stated by one of the other posts, you can leave the battery disconnected to reset the code, but only do this after you fix the problem or as a temp. solution since the code will only return shortly.

Posted on Dec 20, 2008

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  • 51 Answers

SOURCE: p0440 evaporative emission control how to relace or repair

check your gas cap and if it doesnt look like there is a problem with it then you need to take it to someone with an evap leak detector(smoke machine) and clamp off the evap vent hose and look for the smoke. your looking for a vapor leak it could be anything in the fuel system.

Posted on Mar 15, 2009

  • 2 Answers

SOURCE: 2000 Saturn SL2-

Click you ignition on and off 50 times and it will clear the code.

Posted on Aug 21, 2009

  • 5 Answers

SOURCE: Service Engine soon light came on. Scan code

If it has been serviced correctly just take it aback and ask them to reset the warnibg light. If they can't then you should chose another garage to service it.

Posted on Nov 03, 2009

  • 973 Answers

SOURCE: p0440 Service Engine Soon light

Here are some possible causes and fixes http://www.obd-codes.com/p0440

Posted on Jun 17, 2010

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How to reset Service Engine Soon light after replacing gas cap? Took to AutoZone when the Service Engine Soon light came on Error code P0440.


Disconnect the negative battery cable for 30 minutes. Reconnect after and the code will clear. However if the problem persists, the code will come back with in 20 miles or 30 minutes.

Aug 02, 2014 | 2000 Buick Regal LS

1 Answer

PO440


http://www.obd-codes.com/p0442
P0440 indicates the failure of the EVAP system to develop proper vacuum. If you got
and replaced a proper good quality gas cap, you have corrected the most common cause.
However, in fully searching the causes of this code (http://engine-codes.com/p0440_chevrolet.html ) (pardon the generic GM info, but will apply for you)-----you will find there are 5 other causes of the vacuum failure, which are independent of the gas cap. Your good local mechanic can sort those out; I would save your gas cap
receipt if you were advised to buy one not needed. As you probably know, your
State emission test facility checks your gas cap----so that is another way to find that specific portion of this answer,
(for their fee).
P0300 is a generic misfire code. For this, a specific Cadillac forum may be most
helpful = 2001 Deville intermittent service engine soon light code P0300
co-logo-100x100.png 2001 Deville intermittent service engine soon light code... I recently bought this car from an owner who took decent care of it but a week after i bought it, the service engine light appeared. After a few View on www.cadillacforums... Preview by Yahoo You will see that this generic code is perhaps more serious, costly, and harder
to track down than the P0440. You will also discover that P0301 is cylinder 1 misfire, P0302 is cylinder 2, and etc, etc. If you get a good diagnostic, they will generally
be able to localize the problem fairly specifically---and get a more specific fix. The person who reported this code was unhappy because he was given several ($$) fixes,
before he got one that erased the code, and was a solution. (Be forewarned ----A generic misfire can have umpteen issues--or one! !; use your own local preferred method for solving this with a mechanic who gives you good service, and stands behind what they do.)
2001 Deville intermittent service engine soon light code P0300

Jun 04, 2014 | 2001 Cadillac DeVille

1 Answer

Service engine soon


Google --- OBD PO440
Common Evap Code
Will need to be smoked to find the gross leak
in that system
Make sure your gas cap is on

Jul 08, 2013 | 2003 Chevrolet TrailBlazer

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).

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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_9_2012_3_32_10_pm.gif

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

Service engine soon light is on code p0440


Hello i can assist you Your PO-0440 code explanation is a evaporative emission control system malfunction.

Dec 29, 2010 | 1999 Pontiac Grand Am GT

2 Answers

Service engine soon code po440 2002 chevy trailblazer


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
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
Get a new gas cap first to try.
thanks

Jul 30, 2010 | 2003 Chevrolet TrailBlazer

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

Aug 20, 2009 | 2000 Saturn SL

1 Answer

'96 Chevy Blazer Service Engin Soon codes P0440 P0700 P1100


if you are throwing 79 codes it is probably a computer issue.need to clear and see what comes back up. 440 is not a leak but a malfunction check purge solenoid

Dec 17, 2008 | 2000 Chevrolet Blazer

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