Question about GMC Sierra 1500

1 Answer

I have a 2006 GMC truck with its engine light on and after I put my OBD II on it the following codes appeared. P0449 and P0455 are the problem and I need to know how to fix it and how much it will cost to repair it, along with is it worth doing myself or let a mechanic do it. Doug Schubert Meridian, MS

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,803 Answers

These are very common codes. Code P0499 is for the EVAP Canister Vent Control Solenoid circuit and Code P0455 indicates that there is a large leak in your EVAP system. Chances are VERY LIKELY that the leak is being caused by the vent control solenoid being stuck open. If this is the case, repairing what is wrong with the Vent Control Solenoid has a very good chance of fixing BOTH codes.

There is a Technical Service Bulletin (TSB) for your vehicle that applies to code P0455:
TSB REFERENCE NUMBER 02-06-04-037I (NOTE: That last digit is an "I" not a "1")

The vent control solenoid fails due to water, dirt and debris entering the solenoid through the vent filter. This TSB involves replacing the vent control solenoid and installing a long section of heater hose to the vent filter and relocating it away from the underside of the vehicle. I usually use about 8 feet of hose and tie the filter unit to the brace under the hood next to the brake booster. It is not very hard to do. The hardest part is disconnecting the electrical connector from the original solenoid - it is not very easy to get your hands in there.

The kit is available from any parts store that carries AC Delco parts. The kit comes with everything you need except the heater hose and wire ties to secure it.

The part number for the kit is: 19152349

I have also had a couple of them where the wiring harness has rubbed against the underside pinch-weld area of the left rear of the cab, causing the code P0449 When you install the new service kit, be sure to inspect the wiring harness to the solenoid connector for damage here.

Posted on May 22, 2011

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

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

1 Answer

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

Code p0455 on envoy 2004


large evap leak --check gas cap that it is on --look under truck at rear of fuel tank by spare tire and check the evap canister and hoses the following link will assist you
https://www.obd-codes.com/p0455 How to Fix Check Engine Light P0455 Emissions Purge Valve Replacement How to Fix Check Engine Light P0455 Emissions Purge Valve Replacement

Sep 19, 2016 | Cars & Trucks

1 Answer

CODE PO318 U1300 P1629


Nir, Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
2006 Buick code links explanation.

P0318 OBD II Check Engine Code Rough Road GMC General Motors

U1300 OBD II Engine Code GMC General Motors

P1629 OBD II Check Engine Code GMC General Motors

Mar 20, 2016 | 2006 Buick LaCrosse

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

? 16:47
https://www.youtube.com/watch?v=AlfOSMmisPg
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 ...

? 7:06
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

2 Answers

P0449 and P0455 error code 2008 2wd gmc envoy 30,203 miles


P0449 - Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

Both are refer at EVAP system; other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. 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: 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)
Other leak or damaged piece in EVAP system

Possible Solutions: 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, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Hope helps.

Apr 23, 2011 | 2008 GMC Envoy

3 Answers

Engine light came on code is p0455 evap large leak....gas cap was loose ...is this the problem


Here's a little more info on the situation

http://www.obd-codes.com/p0455

Mar 01, 2010 | 2006 GMC Sierra

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

1,362 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...