Question about 2007 Chevrolet Tahoe

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Good night i scanned this vehicle & got a p0449 evap solenoid malfunction i cleared he code but it s a hard code is there any consistant problem assoiated with this code thank you

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2 Answers

Let's go with any light, you get on the dash, of any vehicle
They have been there for 30 years now, and are part of the Govt's policy, to cut down on exhaust emissions
You have a code that says,an EVAP System Malfunction. (Failure)
Can you drive it,sure,but why would you?

You need to have a scanner (professional one) as well as a smoke machine,used to diagnose the issues and repair.

Evap Solenoid--needs to be tested
Don't throw parts at any vehicle,without testing first,unless you want to
Codes do not tell you what is wrong or what to replace

This one maybe the exception

Posted on Oct 15, 2010

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  • Chevrolet Master
  • 8,273 Answers

No common problem I'm aware of. Code indicates computer is trying to open valve but is not getting current flow thru the valve solenoid. Either the wiring to the valve is open or the valve itself has an open. A good scanner can actuate the valve such that one could troubleshoot the wiring by looking at the valve for a signal when the scanner tries to open it. Or, you can hotwire the valve to the battery to see if it will click open. If you have more questions, please let me know.

Posted on Oct 15, 2010

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Posted on Jan 02, 2017

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. Solving a P0449 Engine Code 2005 Chevy Monty Carlo


DTC P0449 Evaporative Emission (EVAP) Vent Solenoid Control Circuit.
Circuit Description
An ignition voltage is supplied to the evaporative emission (EVAP) canister vent solenoid valve. The control module grounds the EVAP canister vent solenoid valve control circuit to close the valve by means of an internal switch called a driver. The scan tool displays the commanded state of the EVAP canister vent solenoid valve as ON or OFF. The control module monitors the status of the driver. If the control module detects an incorrect voltage for the commanded state of the driver, this DTC sets.

Do you know how to test automotive electrical circuits using a volt meter ? How to test a transistor (driver) inside the PCM . Videos on youtube. Do you know what a wiring diagram is ?
Also search P0449 on youtube . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click engine ,then under subsystem click fuel controls . Click search the blue link. Scroll down to #9 diagram . Circuit for vent solenoid . This video is a chevy truck ,doesn't matter .
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I changed everything on a 2007 chevy uplander the camshaft position sensor And the purged sensor And the throttle body and It cam up a new code p0449


DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit , your vent solenoid is opened or the wiring circuit is . The vent solenoid is by the charcoal canister at the gas tank .
P0449 Battery voltage is supplied to the EVAP canister vent solenoid valve. The control module grounds the EVAP canister vent solenoid valve control circuit to close the valve by means of an internal switch called a driver. The scan tool displays the commanded state of the EVAP canister vent solenoid valve as ON or OFF. The control module monitors the status of the driver.

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Code po449 evap solenoid


What about it ? What would you like to know ? Where is it , what is it ? What engine does yours have , six different possibilities .
DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit.
Battery voltage is supplied to the EVAP canister solenoid valve. The ECM grounds the EVAP canister vent solenoid valve control circuit through an internal switch called a driver. The ECM monitors the status of the driver. A scan tool will display the commanded state of the EVAP canister vent solenoid valve as ON or OFF. P0449 Vent Valve Testing EVAP Systems

Mar 10, 2016 | 2008 Chevrolet Trailblazer

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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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1 Answer

On my Hyundai Elantra code P0449 do I need to replace the CANV solenoid?


code p0449 refers to evaporative emission(EVAP) system, vent valve ---circuit malfunction===causes --wiring---EVAP cannister purge valve---ECM
replace the purge valve

Jul 06, 2015 | Hyundai Cars & Trucks

1 Answer

Code p0449 vent solenoid intermittent


EOBD II Error Code: P0449
Fault:
Evaporative Emission (EVAP) System, Vent Valve - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

Dec 28, 2013 | 2001 Pontiac Montana

1 Answer

I replaced evap vent solenoid & dtc came back


Here is the definition of the code and possible causes.

P0449 PONTIAC Description The Engine Control Module (ECM) monitors the Evaporative Emission System (EVAP) Vent Valve/Solenoid system wiring for opens or shorts.

When is the code detected?The Engine Control Module (ECM) has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.

Possible causes - Vacuum leaks, damaged hoses or improper routing
- EVAP system - Check fuel cap, canister, valves or components
- Faulty purge or vent solenoids
- Check connector and wiring
- Fuel saturated vapor canister
- Failed EVAP vent solenoid
Read more: http://engine-codes.com/p0449_pontiac.html#ixzz2M1YJd7DU

Feb 26, 2013 | 2002 Pontiac Grand Prix

2 Answers

Engine light stays on because of DTC P0449. How so you fix the problem with DTCP0449?


  • P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction.if the gas cap is not tieght. if you filled up with car running this code will come on or if there is a leak in the e vap system it can be found by a smoke tester.to clear the code is with a scaner.goodluck
  • Feb 28, 2011 | Chevrolet 1500 Cars & Trucks

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