Question about 2003 Chevrolet Silverado 1500

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Read code p449 silverado 2003 6 cyl.

Had a differ code like said small leak. replaced . solonoid above gas tank.engine ligt still on replaced solonoid on motor said mechanic.engine light still on reads code p449 now solonoid bad. what else can it b.

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Have you reset the computer after replacing those parts? even if the part is new it will still pop up the error until you clear the eprom

Posted on Feb 09, 2009

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3 Answers

Runs good engine lt on code p0455


A loose gas cap or bad gas cap can cause this ,or filling gas tank while it running .or it could be a small leak in the evap system

Apr 21, 2014 | 2003 Jeep Wrangler

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I have a 2005 pontiac g6 and the engine has no acceleration like the cat converter is plugged and has an engine code p449 can you help


CODE PO449 IS EVAP VENT SOLENOID CONTROL CIRCUIT MALFUNCTION CONDITIONS.CHECK FUSE.IF OKAY.VENT SOLENOID FAILED.

Sep 13, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

2003 DODGE DURANGO CODE P0456


Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:
  • A small leak in any of the EVAP hoses or fuel tank hoses
  • A small leak in the purge valve or vent valve
  • The EVAP Canister may be leaking

Aug 14, 2010 | 2003 Dodge Durango

2 Answers

I have a 2003 Trail Blazer with code 442 coming up (small leak in the EVAP system). I know of other owners with the same trouble. Replaced the gas cap without results. It seems to be a common problem, what...


  • Gas cap loose or improperly affixed
  • A non-conforming gas cap (i.e. not factory/original brand)
  • A small leak/hole in a fuel vapor hose/tube
  • Other small leak in EVAP system
  • Faulty vent o-ring seal
  • Thats what your looking for....

    Jan 25, 2010 | 2003 Chevrolet Trailblazer Ext

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    GM Code 442


    Do you mean code P0442? I would assume that's what you mean since you said it relates to the Evap System

    This code indicates that there is a fuel vapor leak in the system. This means that a very small leak has been detected. The leak can be from a hole as small as 1mm


    This code point towards any of the following:
    a loose gas cap or a non factory spec gas cap
    a small leak or hole in the fuel vapor hose/tube
    faulty vent o-ring seal

    The most common fixes is to re install the gas cap, clear the codes, and see if the code returns. Or replace the gas cap and clear the codes and see if it returns. Finally inspect the hoses/tubes for cuts/holes

    This code in no way points to a canister requiring to be replaced.

    Sep 29, 2009 | 2005 Pontiac Sunfire

    1 Answer

    Have a p449 code on my 2003 silverado


    P0449 and P0455 has to do with the Evap Canister control solenoid which causes a large vacuum leak. I think the replacement part number is 19207763. The part is located back by the fuel tank, mounted to its side.

    Aug 29, 2009 | 2003 Chevrolet Silverado 1500

    3 Answers

    2000 cavalier check engine light code po440


    P0440 - Evaporative Emission (EVAP) System


    evaporative emission (EVAP) system has a large leak.
    Check the gas cap or vent valve. these are the most common problems.


    The Powertrain Control Module (PCM) at different times performs various tests on the EVAP system. OBD II Enhanced EVAP systems are in place to keep fuel tank vapors from venting into the atmosphere, and instead purges them into the engine to be burned. Regular pressure tests are conducted by the PCM to monitor the sealed system for leaks. The PCM monitors the EVAP system pressure by watching the Fuel tank pressure sensor (FTP). When the sensor indicates a small leak in the EVAP system, this code is set.


    Here are some additional causes.

    * A small leak in any of the EVAP hoses or fuel tank hoses
    * A small leak in the purge valve or vent valve
    * The EVAP Canister may be leaking

    Jun 06, 2009 | 2003 Chevrolet Cavalier

    1 Answer

    Trouble code 0456


    Gas cap tight?
    • A small leak in any of the EVAP hoses or fuel tank hoses
    • A small leak in the purge valve or vent valve
    • The EVAP Canister may be leaking.

    Apr 25, 2009 | 2003 Chrysler Town & Country

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