Question about 2006 Chevrolet Equinox

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Wont pass inspection cause evap system not hodling right leaking at gas fill tube

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 1118 Answers

SOURCE: had a dead battery. codes won't reset

some cars and trucks after 1995 have to be hooked to a scanner to reset codes. before 1995 you could unhook neg. battery cable and do that. take to autozone they will erase them codes for you.

Posted on Jan 23, 2009

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MrScary66613
  • 1990 Answers

SOURCE: 2001 cannot pass TX inspection

This Usually means that the Catalytic Converter is Bad and needs to be Replaced as the O2 Sensor is On the Exhaust System and the Evap is Detecting High o2 Levels. Please Rate My Response! Thanks!

Posted on Feb 07, 2009

rtjohnson55
  • 75 Answers

SOURCE: What can cause your check engine light to not work

simply the bulb in the dash. I am seeing more and more of these. I have seen in some circumstances that someone has pulled the bulb prior to selling the vehicle so it appears to be mechanically sound. see if the light comes on when you turn the key on but dont start the vehicle. If it does the bulb is good. also if the bulb is good and the light doesn't come on while the vehicle is running -then the evap code may have been an old code and the mechanic will just need to clear it out of the memory.. this should put you in the right direction.

Posted on Dec 05, 2009

  • 37 Answers

SOURCE: 2004 Chevy Cavalier 2.2 eco Automatic 94,000 miles

in my experience the usual culprit is the evap cannister. the problem is it gets moisture in it and freezes during winter thus cracking the plastic. if you lay under the car and look at the evap box it black plastic and if you see a loose or cracked hose or the box itself is cracked that is most likely it. as a side note you can check the gas cap and buy a new one to see if that rectifies the situation. lastly i don't think the gas tank should be suspect as you would probably notice if gas was leaking out of the tank. if you take the car to a dealer or shop they can do a smoke test and determine where the leak is.

Posted on Oct 19, 2010

alicantecoli
  • 22246 Answers

SOURCE: will a leaking gas tank

yes i do think it could quite easly cause this

Posted on Dec 12, 2010

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3 Answers

Gas cap code put new one on check egine light still on


could be your oxygen sensor or catalytic converter.. You may check for leaks in manifold as well.Mass air sensor could also be at fault.

Oct 13, 2014 | 2002 Cadillac Deville

2 Answers

My 2007 Chevy Avalanche failed the emission test with the code of P0455 what is the problem?


It is probably the evap vent valve. A new vent solenoid valve has been redesigned to correct the problem you are having. I would recommend purchasing the dealer component.
I hope this helps.

Jul 02, 2011 | Chevrolet Avalanche Cars & Trucks

1 Answer

Engine scan codes are P0442, P0456 , can you please help me with these codes


P0442 - Evaporative Emission Control System Leak Detected (small leak)
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. 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 P0442 most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
A small leak/hole in a fuel vapor hose/tube
Other small leak in EVAP system
Faulty vent o-ring seal

Possible Solutions: With a P0442, the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, or
Inspect the EVAP system for cuts/holes in tubes/hoses



P0456 - Evaporative Emissions System - Small leak detected
The Powertrain Control Module (PCM) at different times performs various tests on the EVAP system. OBD II Enhanced EVAP systems are in place to keep fuel tank vapors from venting into the atmosphere, and instead purges them into the engine to be burned. Regular pressure tests are conducted by the PCM to monitor the sealed system for leaks. The PCM monitors the EVAP system pressure by watching the fuel tank pressure (FTP) sensor. When the sensor indicates a small leak in the EVAP system, this code is set.

Potential Symptoms: There will likely be no noticeable symptoms other than the Malfunction Indicator Lamp (MIL). This is because the EVAP system is a closed system and only controls fuel tank vapors, not engine management.

Causes: Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:
A small leak in any of the EVAP hoses or fuel tank hoses
A small leak in the purge valve or vent valve
The EVAP Canister may be leaking

Possible Solutions: First, using a scan tool activate the vent solenoid, sealing the system. Then monitor the fuel tank pressure (FTP) sensor. If the system is sealing properly, the number will stay consistent. If is isn't, the pressure sensor will show that as well. If the system slowly leaks, use a smoke machine and watch for smoke exiting the system at any EVAP component. Any where there is smoke exiting the system, that is the faulty component. Do not pressurize the EVAP system with air pressure. Doing so can damage the purge and vent solenoids in the system.


Test it; keep us updated and remember to rate this answer.

Jun 03, 2011 | 2005 Dodge Grand Caravan

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

1 Answer

My check engine light came on and it is a p0442 EVAP SYS, small leak


Evaporative Emission Control System Leak Detected (small leak)
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. 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.

Causes: A code P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal

Possible Solutions: With a P0442, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses


Keep us updated.

Dec 13, 2010 | 2004 Saturn VUE

2 Answers

Location of sensor for troubleshooting po442 to cause check engine light to come on


P0442 OBD-II Trouble Code - Evaporative Emission Control System Leak Detected (small leak)

What does that mean?
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. 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 P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal


Possible Solutions
With a P0442, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses


46b629a.jpg

Fig. EVAP vent solenoid (2) on 3.1L, 3.4L, 3.5L & 3.8L, showing the connector (1) and vapor line (2)


510065b.jpg

Fig. EVAP canister purge solenoid location on 3.1L & 3.4L


a193655.jpg

Fig. EVAP purge solenoid valve (3) location on 3.5L




Hope this help, good luck.

May 11, 2010 | 2002 Buick Century

2 Answers

2000 chevy 5.7 evap code po442 what does this mean and how do I get rid if it. thanks any info will be helpful


A code P0442 most likely means one or more of the following has happened:

•A loose or improperly affixed gas cap
•A non-conforming gas cap (i.e. not factory/original brand)
•A small leak/hole in a fuel vapor hose/tube
•Other small leak in EVAP system
•Faulty vent o-ring seal

With a P0442, the most common repair is to:

•Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
•Otherwise, replace the gas cap, or
•Inspect the EVAP system for cuts/holes in tubes/hoses

Jan 25, 2010 | 2000 Chevrolet 3500

2 Answers

1998 volvo failed emissions for trouble codes present: P0172 P0455. What to do now


Code P0172 relates to the engine running too lean.
Code P0455 indicates that a leak has been detected in the Evaporative Emission Control System.

P0455 is most often caused by a a problem with the gas cap. It is either incorrectly installed, damaged or just worn out. Other possible causes are a leak in the EVAP system caused by damage or a loose vacuum line.
To solve this first check your gas cap for any damage or wear. For the EVAP system check under the hood. Listen for any vacuum leaks or for the odor of fuel. Check all the vacuum tubes and hoses for breaks in the line. If you find any repair or replace them.

The cause of P0172 is usually associated with a bad O2 sensor but this is not always the case. The causes could be a vacuum leak, an issue with the Mass Air Flow sensor (MAF) or some type of restriction with the fuel system.
The solutions are to inspect the inspect all vacuum and PCV hoses (which you have already done). Inspect and clean the MAF sensor. I am unsure what type engine you have but this will be located somewhere between the intake manifold, possibly on the large black air intake tube.
Finally check the fuel system for leaks. Also the fuel pressure should be checked. You should also run a good quality fuel injector cleaner through a couple fill ups.
After you have done all the simple tasks, (inspecting the gas cap and inspecting the vacuum line and hose on the EVAP system replacing if needed and the fuel injector cleaner. Get your codes reset and wait to see if they come back. If so I think your next step is to replace the O2 sensor. If this still does not solve the problem you will most likely need a complete engine analysis before you can continue.
If you get to that point you should re-post here with the results of the analysis before spend a large sum of money.
I hope this helps and good luck.





Sep 23, 2009 | 1998 Volvo S70

1 Answer

Evap code sm. & lg. leak


it can because most vehicles work with a pressurized fuel system, some will even give you a check engine light if you don't have the gas cap on tight enough. i recommend at least 3 clicks

May 30, 2009 | 1999 Jeep Grand Cherokee

2 Answers

Evap leak in fuel


Remove the gas cap and re-install it making sure that you hear it click several times. What your evap leak could be is the gas cap allowing gas fumes to escape. All it takes is a .040 leak to turn on the engine light. If it persists you'll have to have the emission system smoke tested. What happens is the system is literally filled with smoke and the leak will be found by where the smoke comes from.

Nov 23, 2008 | 1998 Buick Century

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