Question about 2006 Chevrolet Tahoe

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OBD code P0449

IM getting OBD code P0449 how can I repair this issue?

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That dtc is for evap system vent valve solenoid circuit. the computer is having a problem opening or closing that solenoid (a kind of electric motor that in this case moves to allow or prevent evaporated fuel to leave a canister that captures it) and it's letting you know that it has this problem because proper operation of that system is important to the emissions level of the vehicle. it also contributes to better fuel economy so you probably do want to fix it. the quick and easy way to deal with it is to replace the evap canister vent valve and hope that it wasn't the wires in between that part and the enigne computer that were causing the problem. your tahoe is new enough that this is probably a good guess, the wires are probably good. just a tip, when you put fuel in your vehicle stop when the pump quits the first time. if you keep pumping fuel into it you can fill the evaporative canister and evap system with fuel and the little electronic parts aren't made to take being submerged in raw gasoline. hope that helps

Posted on Jun 04, 2009

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Do not overfill the tank. Stop when the handle clicks. There is an emissions vapor canister that is responsible for collecting fuel vapor when you are parked. When you over fill the tanks on these models, the canister gets saturated with fuel. Try filling it to 3/4 for a couple weeks and see if the problem goes away. Please rate if you find this helpful, thank you.

Posted on Jun 04, 2009

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Posted on Jan 02, 2017

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Replaced purge valve cannister & tube on 2009 chevy impala ss plus 10amp fuse, gas cap code is p0449; now the check engine light has not went out been 4 days since replace now what 2 do...help help


gas cap code p0449 ??? This is not a gas cap code ! DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit.. your best bet , take it to a qualified chevy repair shop .


Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

Apr 12, 2017 | 2009 Chevrolet Impala

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How 2 clear check engine light code p0449 replaced already just want 2 clear check engine light did 2009 Chevy Impala ss use OBD scanner first then got code & then only i replaced


Easiest and probably cheapest way is to purchase a OBD II code scanner. You can get one at autozone or online for fairly reasonable. They are good to have on hand for future repairs. Most have the option to clear codes.

Apr 08, 2017 | Cars & Trucks

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What makes my Chevy malibu 2005 v6 put system code po449 out


P0449 - OBD II Trouble Code Evaporative System Vent Valve/Solenoid Circuit Malfunction Our emissions expert has put together the following information about the P0449 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
  • OBD II P0449
Fault Code Definition
  • Evaporative System Vent Control Circuit Malfunction
What does this mean? The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions-dictated by engine temperature, speed, and load-the EVAP system stores and purges these captured fuel vapors back into the combustion process. The carbon canister, which stores the raw fuel vapors, utilizes a vent valve that allows fresh air to enter the EVAP system. This displaces the fuel vapor as it's purged into the combustion process. Code P0449 indicates that the evaporative control (EVAP) system vent valve solenoid is malfunctioning. This can be caused by either too little or too much electrical resistance or a mechanical problem with the vent valve itself. Symptoms
  • Check Engine Light will illuminate
  • In most cases, there are no adverse conditions noticed by the driver
  • In some cases, there may be a noticeable fuel odor caused by the release of fuel vapors
Common Problems That Trigger the P0449 Code
  • Missing fuel cap
  • Defective Evaporative Vent Valve
  • Defective or damaged fuel cap
  • Distorted, damaged or cracked Fuel Tank Filler Neck
  • Torn or punctured Evaporative system hose(s)
  • Defective Fuel Tank Sending Unit gasket or seal
  • Split or damaged Carbon Canister
  • Defective or damaged fuel tank
Common Misdiagnoses
  • Fuel cap
  • Evaporative Purge Valve
  • Evaporative Vent Valve
Polluting Gases Expelled
  • HCs (Hydrocarbons): Unburned droplets of raw fuel that smell, affect breathing, and contribute to smog

P0449 OBD II Trouble Code

Jan 30, 2017 | Cars & Trucks

1 Answer

What are the probable causes of DTC P0449?


P0449 - OBD-Codes.com

www.obd-codes.com/p0449
Detailed information on diagnosing and repairing a P0449 DTC code which refers ...P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit ... OBD-IITrouble Code Technical Description ... 2004 Chevrolet Tahoe 4.8L p0449

EVAP Code P0449 - YouTube

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Mar 13, 2013 - Uploaded by realfixesrealfast
Here is a description and how to diagnose EVAP code P0449. ...Up next. Quick Easy Fix P0449 P0455 Evap Codes on ChevySilverado 2007 ...

Quick Easy Fix P0449 P0455 Evap Codes on Chevy ...

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https://www.youtube.com/watch?v=aL5KmV1d26Y
Dec 27, 2013 - Uploaded by wagslick
Quick Easy Fix P0449 P0455 Evap Codes on Chevy Silverado 2007 .... Well clearing the error codes at auto store will not prevent it come ...

Solving a P0449 Engine Code on a 2008 Chevy Impala ...

pressanykey.simplyahobby.com/.../solving-a-p0449-engine-code-on-a-2...

Jan 07, 2016 | 2004 Chevrolet Chevrolet Impala

1 Answer

I have a 1999 firebird v6 and have the codes p0452 and p0449 they are both persistent codes but the p0452 comes up first, anyone know a fix?


All you have to do is Google your codes & read up

TYPE: OBD PO452 etc

You know what the fix is

Go to a repair shop & have them smoke test the Evap
System,find all the problems & make the required repairs

Be a good idea to find a repair shop, like you find a doctor

Before you need one

May 15, 2014 | Cars & Trucks

1 Answer

Code p0449


This code is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model. The Powertrain Control Module (PCM) / Engine Management Computer (EMC) / Engine Control Module (ECM) has detected a fault with the circuit that controls the vent for evaporative emission systems vapor. As fuel sits in the tank it lets out fuel vapor, while driving this vent opens and allows the vapors to be circulated into the engine intake manifold, a charcoal canister or into the atmosphere, depending on the vehicle. This vent valve is apart of the simple, yet complicated evaporative emissions system. Symptoms Symptoms of a P0449 DTC will include Malfunction Indicator Lamp (MIL) illumination, you will likely not notice any other symptoms. Causes Potential causes may include: Faulty vent valve Wire/circuit issue PCM/EMC/ECM fault Possible Solutions Some steps to take to diagnose and repair this trouble code include the following: Check your fuses, there may be a fuse that powers the vent solenoid. Check for a rubbed-through or chafed wiring harness. Check both wires to see if they are shorted to each other, to ground or power. Visually inspect the vent valve for cracks or damage. Trace the wires to and from the PCM/EMC/ECM and check for continuity continuity using a digital volt ohm meter (DVOM). If you have access to an advanced level scan tool, actuate the valve while reading power and ground at the connector or by simply using a bulb wired to both terminals, it will light up if power and ground are OK. Using a DVOM, check the resistance of the vent, in most cases the resistance reading should be low, refer to the manufacturer's specification or compare it to a new one. Too high or low a value indicates a faulty coil inside the valve, thusly meaning replacement is necessary. This code seems to be prevalent on Dodge, Chrsyler, and Jeep products. In those cases the vent valve was bad. With GM products (specifically pickups), GM has released a new updated valve assembly. Finally, remove the valve, you may be able to access the pintle inside and it simply could just be sticking from fuel residue. Clean it and retest.

Read more at: http://www.obd-codes.com/p0449
Copyright OBD-Codes.com

Oct 06, 2013 | 2010 Chevrolet Camaro

1 Answer

Check engine light on steady, and codes 0445 & 0449 from computer


The codes you list are generic and unfortunately the descriptions provided are too. Do a bit of research into the applicalbe parts and you'll likely find a trend of malfunctions and repairs for your particular model year. After that it's time to either get greasy or see the mechanic, doesn't sound like it will be too bad, though.

http://www.obd-codes.com/trouble_codes/

P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted

P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

Hope it helps,

Jun 08, 2011 | Pontiac Montana SV6 Cars & Trucks

1 Answer

OBD error code P0449 2006 Trailblazer


Go to an autoparts store like Autozone, O'Reilly's, etc., and they'll have a scanner to diagnose the error code for you. It's usually free for this service.

Mar 14, 2010 | 2006 Chevrolet Trailblazer

1 Answer

P0449 code: couldn't get an inspection due to


p0449 is a EVAP code here is something to check had a few of these inspect the wiring harness coming out of the right rear floor pan area at connector The harness is located in front of the EVAP canister, and will usually show signs of wear. Make sure that you inspect all the wiring carefully and make all necessary repairs
hope this helps

Jan 17, 2010 | 2006 Chevrolet Malibu

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