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Why does my vent light keep coming on? - Cars & Trucks

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Will need more info Heather , vehicle make,model year , which vent , on all the time ,flickers on/off, only now and again on ?

Posted on May 02, 2015

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Posted on Jan 02, 2017

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I HAVE A 2001 CHEVY CAVALIER 84,675.00MILES . THE CHECK ENGINE LIGHT KEEPS COMING ON AND HAS BEEN CHECKED BY A MECHANIC SEVERAL TIMES. I REPLACED THE GAS CAP. THE CODES KEEP COMING UP A READING OF P4400. ...


P0440 is a large evap leak, so it should be pretty obviuos. first check if the vent valve is closing. then check when the purge valve is closed that its not leaking. He needs to COMMAND the vent valve closed and then smoke it. He should be able to command purge and close the vent valve, then turn off the purge and watch the vacuum level to know if its fixed or not.

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My 2004 GC has engine light reading code of small and large vaccum leak. Mechanic couldnt find anything under hood. Vents for AC or heat switch to defrost area when pulling a hill, then back to normal when...


Some vehicles are equiped from the factory to lower or deter ac and heat flow from the vents in order to keep power and moment when the engine is under more load. This happens on my girlfriends explorer as well but for hers its a factory thing. When the vents started acting up is this when the engine light started coming on?

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Getting an error code of PO449 for a check engine light. this says it is the Evaporative Emissions Control System Vent Valve/Solenoid Circuit Malfunction. I keep looking for a replacement part of the vent...


You are right. You need the vent valve not the purge valve. The vent valve is a dealer item. Also this is a common problem and GM has released a bulletin on this that involves moving the location of the valve and running some new lines. It comes as a kit from GM, and it costs about a 100 bucks.

Dec 02, 2010 | 2005 Chevrolet Silverado

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My check engine light on my 2006 Chevy Equinox keeps coming on. I have replaced the gas cap because the original one wouldn't screw on tight. I also took it to a repair shop and they replaced the evap vent...


I would bring it back to the shop that did the work. If the code is coming out as a problem with the evap system it is not abnormal for the system to take 2 or 3 days for it to read again.

Mar 30, 2010 | 2006 Chevrolet Equinox

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Gasoline pump at gas station keeps turning off


There is a vent valve located near the fuel tank. The vent valve is part of the EVAP emission system. If the valve is obstructed or failed, air will not escape while refueling.
Has the service engine light come on at all?
Regards,

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I can't pump gas in my 04 GMC Envoy, it keeps shutting off


run the fault codes
indicates a EVAP venting problem

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My 97 honda civic dx check engine light keeps coming on


Had this issue did you replace the exhaust

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2003 Chevy Silverado 1500 Error Codes


P0135 is a bad 02 sensor
P0442 is a evap problem
P0449 is a vent solenoid

i would check the vent solenoid first its a 4ws fuse under the hood in the fuse box make sure you have power to it you should have power at all times the ground comes from the pcm i think if you fix this everything else will work they are all computer controled

Mar 23, 2009 | 2003 Chevrolet Silverado 1500

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1993 transmisision


might check the vent on trans,,(not transfer case if 4wheel drive),,if the vent is pluged up little,, it will blowfluid out of dipstick are,, and cause smoke and light to come on at times,, as tranny is being over worked,, from getting to hot,, and low on fluid

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