Question about 2005 Chevrolet Equinox

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P0455, i HAVE A SMOKE MACHINE, NO LEAK. NEW GAS CAP. I reset the light and code came back

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A code p0455 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: with a p0455, 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.

Posted on Sep 14, 2010

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How to fix code po455 on 2005 cobalt


I researched this and found the following information. Hope it helps: P0455 means a gross leak detected in the Evaporative Emissions System. Some call this a "gas cap" code, because the most common cause a loose or failed gas cap. But it could be caused by any vapor leak in the fuel tank, filler neck, or anywhere else in the vapor management system. If it isn't a gas cap, you will need tol take it someplace where they have a smoke machine that can find the leak using smoke.

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p0 (USA fed. codes)
455
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What would cause p0441, p0442, p0446, p0455 to come in on Toyota Rav4


Hello, these are evap codes , ask yourself couple if questions , what did I do different from all time driving , did I fill the car up while the car is running ? Did i tie the gas cap properly? If you checked all these and you know for sure that these two things are ok and you didn't fill gas while the car is running , then you might have an evap leak , most likely would be best to take it to your local shop and they will use a smoke machine to locate the leak, but I would change gas cap first and disconnect the battery to reset the codes and see if they come back , oif they didn't come back , then you are ok and you have nothing to worry about . Hope this help . Gas cap cost less then 10 box at your local auto parts store .

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P0455 means a gross leak detected in the Evaporative Emissions System. Some call this a "gas cap" code, because the most common cause a loose or failed gas cap. But it could be caused by any vapor leak in the fuel tank, filler neck, or anywhere else in the vapor management system. If it isn't a gas cap, you will need tol take it someplace where they have a smoke machine that can find the leak using smoke.

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04 trailblazer cel has a p0455 code what could be the problem ,it has a new gas cap


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Check engine light came on went to auto zone said it was gas cap. Bought new gas cap. reset engine light. two days later check engine light is back on. what next?


Hi, if the code was P0455, there are other possible reasons. The computer fuel tank pressure sensor has detected a leak which could also be in the vapor canister, or the hose from the canister to the purge valve, or the purge valve itself may be leaking. Please inspect the system for these leaks. I may be able to provide some pics of these parts if you tell me your model, year, and engine info.

Evaporative Emission Control System Leak Detected (no purge flow or large leak)
What does that mean? 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 A code p0455 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 With a p0455, 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

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Check engine light is on p0455 is the code whatis it


P0455 EVAP EMISSIONS SYSTEM GROSS LEAK DETECTED.CK GAS CAP.IF IT IS TIGHT U WILL NEED A SMOKE MACHINE TO CK THE SYSTEM FOR LEAKS

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Engine light stays on. Code P0455 shows up. Had bought a new gas cap as the old one was worn out.


code po455 isis no purge system or large leak, only way to find this is with a smoke machine, most shops will do this for a fee,should not be too expensive range 25-75 dollars

Apr 25, 2009 | 2005 Chevrolet Equinox

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