Question about 2001 Oldsmobile Alero

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2001 Alero code p0440.

Code p0440. Small evap leak, replaced gas cap, smoke test was done and the charcoal canister because there was a leak there. Code came back after about three days. Just need to pass emissions test, Any suggestions?

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There is still a small leak, the shop thats doing the testing can repair it? right? Usually these things are just one item, you may have more than one.

Posted on Sep 28, 2009

  • rippntear2 Feb 21, 2011

    usually these things just one item you may have more than one what kind of idiot answer is that mr guru

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Posted on Jan 02, 2017

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Have replaced 2 solenoids near engine, is there a 3rd underneath car?


There is a vent solenoid under the vehicle near the gas tank on the evaporator canister or charcoal canister An your replaced one near the engine you didn't need to. Only 1 on or near engine ( purge solenoid ) But there is also the possability the gas cap leaks , the fuel filler neck is rusted somewhere , or one of the hoses as a pin hole . You could replace all the solenoids an still have the code come back. The best way to trouble shoot these type problems is hook up a smoke machine an smoke the system . Your best bet would be to take your vehicle to a qualified repair shop. I mean unless you like spending money needlessly .
DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected.To aid in locating intermittent leaks, use the J 41413 EVAP Pressure and Purge Station to pressurize the EVAP system. Move all EVAP components while testing with the J 41416 Ultrasonic Leak Detector.

Jul 16, 2016 | 2000 Oldsmobile Alero

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Error code 0440 on a 2002 buick custom


Go to an auto parts store and get a Haynes repair manual for car it will have the code meanings for any and all codes on that vehicle. Only bad thing is the book cost around $30 maybe you will get lucky and one will be open and you could take a peak inside.

Mar 23, 2015 | 2002 Buick Century

1 Answer

I have a Subaru Impreza 1989.. I'm having problems


Sometimes a faulty gas cap can set this code. If you ever replaced the filler cap with an aftermarket cap, get an oem gas cap from Subaru. If that isn't the problem, a shop could run a smoke test of the evap system to look for a leak. Fuel vapors are escaping from the evap system somewhere between the gas tank and the charcoal canister and the engine. If you can smell gas at times from front or back of car it may help you to start looking for the leak, but a smoke test is often required.

Dec 17, 2012 | Cars & Trucks

2 Answers

Po440code 96nissan pu 2.4engine replaced gas cap code still coming on


You must have a leak somewhere in the tank, because gas caps seal and vent at a certain pressure (1-2psi) a smoke test would check it. Try clearing the code first. If it keeps comming up, test it.

Feb 22, 2012 | Nissan Pickup Cars & Trucks

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

3 Answers

I need to know what p0440 means


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.

Mar 16, 2011 | Buick LeSabre Cars & Trucks

1 Answer

It is coming up with p440 code


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

Other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

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Feb 01, 2011 | Chevrolet Venture Cars & Trucks

1 Answer

Well my light is on had that test done on it and the code is 0440 so could you tell me what actually that is.


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

Jan 21, 2011 | 2002 Oldsmobile Alero

2 Answers

P0440 code


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

Dec 08, 2010 | 2004 Lexus LS 430

1 Answer

My 2002 has the code PO440? What's that for?


Code P0440, What does that mean?

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.
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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

Sep 28, 2010 | Chevrolet Tahoe Cars & Trucks

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