P0449

Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

DTC P0449, sometimes indicated as P044900 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing evaporative emission control system vent valve/solenoid circuit malfunction.

The evaporative emission control system vent valve/solenoid circuit malfunction is a code that is set when the evaporative emission control system vent valve or solenoid circuit is not working properly. This code can be caused by a number of things, including a bad valve or solenoid, a wiring issue, or a problem with the ECU.
The best way to fix this code is to find and fix the underlying problem. This may require checking the wiring, replacing the valve or solenoid, or replacing the ECU.

  • P0449: Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
  • P0449: Evaporative Emission System Vent Valve/Solenoid Circuit
  • P0449: EVAP Emission Control System Vent Vlv/Sol Malf
  • P0449: Evaporative emission (EVAP) system, vent valve – circuit malfunction
  • P0449 00: Adjustment of venting in the fuel vapor capture system
  • P0449 00: Evaporative emission (EVAP) system, vent valve - circuit malfunction

See Also: Related Error Codes
DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • 23-NA-073 - ENGINE AND ENGINE COOLING
    CHEVROLET: This technical bulletin provides repair information to correct a customer concern of evaporative dtcs P0442, P0446, P0455 or P0449, caused by dust intrusion into the evaporative canister.
  • 23-NA-073 - ENGINE AND ENGINE COOLING
    CHEVROLET: This technical bulletin provides repair information to correct a customer concern of evaporative dtcs P0442, P0446, P0455 or P0449, caused by dust intrusion into the evaporative canister.
  • 23-NA-073 - ENGINE AND ENGINE COOLING
    CHEVROLET: This technical bulletin provides repair information to correct a customer concern of evaporative dtcs P0442, P0446, P0455 or P0449, caused by dust intrusion into the evaporative canister.
  • S2025000002 - ELECTRICAL SYSTEM
    JEEP: Customer complaint includes check engine/mil light on. Upon further inspection, fault codes will be found in the powertrain control module (pcm) for P0441, P0443 or P0449. Fault codes may be either active or stored.
  • S2025000002 - ELECTRICAL SYSTEM
    JEEP: Customer complaint includes check engine/mil light on. Upon further inspection, fault codes will be found in the powertrain control module (pcm) for P0441, P0443 or P0449. Fault codes may be either active or stored.
  • S2025000002 - AIR BAGS
    JEEP: Customer complaint includes check engine/mil light on. Upon further inspection, fault codes will be found in the powertrain control module (pcm) for P0441, P0443 or P0449. Fault codes may be either active or stored.
  • PIE0528 - ENGINE AND ENGINE COOLING
    CHEVROLET: Some customers may note a check engine light related to the evaporative emission canister performance. Technicians may find the following dtcs set: P0442 P0455 P0446 P0449 P0498 this engineering informational bulletin is
  • PS532_R1 - ENGINE AND ENGINE COOLING
    KIA: Pitstop - dtc P0449 vent valve/solenoid circuit & P2422 vent valve stuck closed - this bulletin has been revised - when addressing a concern related to P0449 (evaporative emission system ? Vent valve / solenoid circuit) or P2422 (evaporativ
  • PIE0417 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
    CHEVROLET: This engineering informational bulletin is requesting information from the field on vehicles that have the condition of malfunction indicator lamp illuminated and dtc P0449 set.
  • PIE0417A - ELECTRICAL SYSTEM
    CHEVROLET: This engineering informational bulletin ends the need for information from the field on vehicles that have the condition of malfunction indicator lamp illuminated and dtc P0449 set.
  • PS532 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
    KIA: Pitstop - dtc P0449 vent valve/solenoid circuit - when addressing a concern related to P0449 (evaporative emission system - vent valve / solenoid circuit) on 2017-2018my sportage (ql) model vehicles, and the canister closed valve (ccv) and
  • 15-06-04-002 - EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
    CHEVROLET: This technical bulletin provides repair information to correct a customer concern of malfunction indicator lamp (mil) illuminated, fuel tank hard to fill, and technicians finding one or more dtcs: P0442, P0446, P0455 or P0449 set.
  • PS162R1 - ENGINE (PWS)
    KIA: Pitstop: sorento (xm) with dtc codes P0449 or P2422 - some sorento (xm) vehicles may set a dtc flow P0449 or P2422 which may be caused by spider webs in and around the evaporative emissions vent lines creating the set dtc. To repair this co
  • SB-02-06-04-0371 - ENGINE AND ENGINE COOLING:ENGINE
    CHEVROLET: Chevrolet/gmc: check engine light on, fuel tank hard to fill, dtcs P0442, P0446, P0455 or P0449 set (replace evaporative emission (evap) vent valve solenoid assembly and add/relocate fileter box using service kit). *pe
  • 070845003 - ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
    CHEVROLET: Intermittent no start/long crank, start then stall, check engine light on, intermittently functioning or inoperative electrical systems, dtc P0442 or P0449 set (inspect ubec and replace connectors as necessary) *nj updated 2/17/10.
  • 980298T02 - ELECTRICAL SYSTEM
    SATURN: Saturns built up to and including vin wz174921 may exhibit dtcs P0201, P0202, P0203, P0204, P0443, P0449, P1691, P1693 with an extended cranking time and / or start then stall. *tt
Consumer Complaints for this DTC


2011 CHEVROLET HHR

Purge vent valve ground wire keeps breaking off in the wiring harness due to not enough protection(from the elements)and causing the check engine light to come on(P0449 -purge vent valve circuit malfunction) and sometimes have a gas order in the vehicle due to this ongoing issue and needs to be addressed on how to remedy this issue. This is the second time that i have with this issue.
ELECTRICAL SYSTEM,


2010 CHEVROLET IMPALA

The diagnostic revealed that there are 11 codes in the vehicle system. These codes ranged from passkey system failures to evap codes to transmission. Suspected failure of wiring harness altogether with possible bcm/cam failure as well. During battery test there was a regular drop in voltage while connected to the scanner reflecting a drain in the electrical system that could further be causing an issue. Codes are P0513 , P0523 , P0700 , P2122 , P0411, P0449 ,P0455. When driving stabilitrack, engine power reduced, and stabilitrack traction control. Sometimes the car shuts off while driving and the steering wheel will lock , i'd w ok old have to pull over on the side of the highway or street and pop the hood just to get the car started again.
ELECTRONIC STABILITY CONTROL, ENGINE ELECTRICAL SYSTEM ENGINE ELECTRICAL SYSTEM ELECTRONIC STABILITY CONTROL


2009 CHEVROLET MALIBU with 188000 miles

When going over any bump or turning the front end shakes and makes a clacking noise. Esc is off. Traction control is always off. Error codes read P0010 P0449 P0013 P0722 P0011
SUSPENSION, STEERING ELECTRONIC STABILITY CONTROL


2009 SATURN AURA with 138000. miles

The plastic casing on the shifter cable has broken and the sprag on the at transmission is bad.... Or so i have been told. It is in the driveway now with the abc, brake, traction control and esc lights lit as well as error codes P0449 & P2101. I have temp repaired the shifter cable and it will shift through the gears but will not go into gear. I was driving down i-635 when it stopped going into gear.
POWER TRAIN, STEERING ELECTRONIC STABILITY CONTROL SUSPENSION


2008 CHEVROLET TRAILBLAZER

Engine light illuminated with error code P0449(evaporative emmision system vent/valve solenoid circuit.
ENGINE AND ENGINE COOLING,


2007 GMC ACADIA with 130000. miles

So got my first gm and will be last one u can not fix this car it wont let you and not talking about normal maintenance have only had 2 year just got back after having transmission rebuilt had motor rebuilt last summer do to timing chain took on 100 mile trip today now gauges are freaking out about every 5th time u start it have code P0449 wich wasnt there before but obviously has nothing to do with transmission then get home tonight and its got P0019 so basically looks like il be having to have motor rebuilt again if i dont burn to ground first so all and all not counting maintenance on it like struts tires oil change you no normal wear and tear just in the motor and transmission in 2 years il have 11.000 wraped up in a suv thats worth about 7000 and wont let u get out from under it it is the worst money pit i have ever had. For every thing u fix on it it creates 3 more
POWER TRAIN, ELECTRONIC STABILITY CONTROL ELECTRICAL SYSTEM


2007 CHEVROLET TAHOE

I have a 2007 Chevrolet Tahoe and in the past 2 years i have codes P0449 & P0455 codes come up constantly, we have already replace the parts that those codes request evap purge, veat valve 3 times and the car keeps giving the same issues, it starts with asking to tight the gas cap (replaced twice with original gm parts) and then the engine light comes next
FUEL/PROPULSION SYSTEM,

Previous Code: P0448 | Next Code: P044A