Question about 2000 Chevrolet Tracker

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2000 tracker, 2.0, p0440. any common probs..new cap, and tested all solenoids. all seem to working fine

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HI, with a DTC PO440 you are looking for a very small leak without the proper test equipment they can very hard to find since the EVAP lines are small and routed up and over things. Here are a few of the common problems i fix for this DTC on Trackers. Chcek the lines running into the purge tank they crack. check the top of the fuel filler neck for rust it doesn't let the car seat and seal. If you cant find anything by visual inspection you will need to go visit your favorite mechanic.

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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P0440 code with check gas cap message how do I fix this


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

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

Jan 10, 2016 | 2000 Cadillac Seville

3 Answers

What does code 440 mean on a 2000 Chevrolet Malibu


P0440 - is a large EVAP leak. The EVAP system stores fuel vapor from the fuel tank and then delivers it into the engine under certain condition. The EVAP system basically consists of a purge solenoid, vent solenoid, charcoal canister, fuel tank and a fuel tank pressure sensor.

There are two common causes for this code. One is the fuel cap, make sure it is tight. Also check the filler knock where the gas caps seals to see if there is an excessive amount of rust build up which can also cause this code.

The other is the vent solenoid. If it sticks open the system will not be able to go into a vacuum mode. The vent solenoid is usually tucked up in the quarter panel on the drivers side right behind the tire.

A scan can tool is usually needed to monitor data and activate solenoids.

Feb 27, 2015 | 2000 Chevrolet Malibu

1 Answer

1996 Geo Tracker gas cap has to be exact fuel pressure?


Old post. but this is common on ALL EFI CARS.
great question and is very easy.
btw one of the best posts on the forum best of 1300.
the gas cap must have the proper vacuum breaker (ask STANT for one) if missing the cooling fuel will pull and illegal vacuuum and the gas tank will implode (crush) I have a nice photo of same car doing that.
this vacuum also stalls the fuel pump, as the vacuum builds.
this happens on cooling day not getting hotter day.
to prove this drive with the cap loose and ignore the ECU check light for EVAP failure. (pressure test fails)
loosen the cap key on, 3 times to 5 times to build pump
pressure, the pump only runs key on for 3 sec. then start it up.
the other proof of lost fuel is the test fuel test. (spray)

to google landers. i make this. post.

Jan 18, 2013 | 1996 Geo Tracker 2 Door

2 Answers

1st code p0440, then code p0453 then p0452 now p0446


This problem is out side the gas tank , has nothing to do with the fuel pump or fuel level sending unit inside the gas tank .DTC P0446 EVAP Vent Solenoid Valve Control System . Do you know anything about automotive evaporative emission system ?
Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid Open and the EVAP canister vent solenoid Closed. This allows vacuum to be applied to the EVAP system. Once a calibrated vacuum level has been reached, the control module commands the EVAP canister purge solenoid Closed and the EVAP canister vent solenoid Open. The control module monitors the fuel tank pressure (FTP) sensor for a decrease in vacuum. If the vacuum does not decrease to near 0 inches H2O in a calibrated time, this DTC sets.

Mar 13, 2017 | 2000 Cadillac DeVille

1 Answer

I have 2000 Montana. Service Eng light on, a check says: P0440 -- evaporated emission cntrl system small leak/low flow condition. Explanation: defective or loose fuel cap, evvap canister or hose cracked-...


P0440 small evap leak, If it was purge at fault the PCM would give you a purge failure code, If it was that vacuum leak you are hearing you would of have lean bank code, anything with the evap in the engine compartment is purge,the back where the fuel tank is or the canister is evap. so you have evap problem,slow leak a broken hose would be gross leak detected. as for electrical it would be solenoid evap.fix the gas cap. 3_17_2012_9_11_41_pm.jpg

Mar 17, 2012 | 2000 Pontiac Montana

5 Answers

I just got a code po440 and I dot no where to start it seems like its harder to start the engine and it seems like I get a gas smell sometimes


P0440 - Evaporative Emission Control System Malfunction

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Symptoms: You likely won't notice any drivability problems.

Causes: 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

Hope helps.

May 23, 2011 | 1997 GMC Jimmy

2 Answers

Check Engine lite comes on Code PO440


16824/P0440/001088 - EVAP Emission Control Sys: Malfunction Possible Symptoms
  • Malfunction Indicator Light (MIL) active
Possible Causes
  • Evaporative Emission (EVAP) System leaking
  • Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) faulty
  • Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115) faulty
Possible Solutions
  • Check Evaporative Emission (EVAP) System Sealing
  • Check Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
  • Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115)

Jun 17, 2010 | 2000 Volkswagen Beetle

2 Answers

What does p0440 diagnostic code mean on a 2000 yukon?


This indicates that a part of the EVAP control system is no longer functioning correctly.

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

Jan 28, 2010 | 2000 GMC Yukon XL

2 Answers

I have a 2002 gmc envoy bringing up codes P0440 and P0495 does anyone know what these are? it seems to run fine but it makes an awful noise like a jet plane when you accelerate and the check engine light...


P0440 - Evap system large leak. This code has a real common problem of the fuel fill cap either loose or the seal or check valve bad in the cap. There are also some hose and lines from the fuel tank to the charcoal canister that can be the problem. But most common is fuel cap loose or bad.

P0495 - Cooling fan rpm too high. This code sets when the control module has commanded the cooling fan rpm to zero and the rpm exceeds a predetermined amount. Your vehicle has a clutch driven cooling fan that the control module regulates through a solenoid valve. Most common problem is a stuck fan clutch which is consistant with the "jet plane" noise you are hearing. The clutch staying engaged when it should be slipping or "idling"
Good luck

Sep 03, 2009 | 2002 GMC Envoy

2 Answers

Obd code p0440 for check engine light on 2000 Toyota Corolla


p0440 code means that the evap system has a leak. This could be caused by a bad or improperly installed gas cap. Either that or the purge solenoid has failed or the canister is plugged and not working properly.

Nov 15, 2008 | 2001 Toyota Corolla

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