Question about 2004 Pontiac Sunfire

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Check engine light came on and i checked the code and got PO455. Checked the gas came to make sure of a good seal and it was fine. Where else should i look?

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PO455-Evap Control
System Leak (No Purge Flow
or Large Leak)

There are 12 things on the trouble chart
it could be

You will need a repair shop

Posted on Mar 13, 2011

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Ford escape check engine code po455


First thing is to have the gas cap tested, or just replace it.if cap is good the next possible couse would be the evaperative canister located near or around the gas tank. Most likely the gas cap though.

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Check engine light came on and the code showed po455


its a evap code could be from a bad gas cap to a cracked vapor line or a bad sensor

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The Code PO455 is coming up on my 2006 Chevrolet Cobalt 2.2 4 cycl engine. Any ideas what this is?


P0455 Evaporative Emission Control System Leak Detected (large leak check your gas cap make sure its tight , check the EVAP system for cracked or disconnected hoses,, once you remove and put the gas cap back,, clear the code and wait a couple of days ,, you should be fine

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I got a code of PO455 can you explain to me what that actually is??


P0455 is a Large Evaporative System Leak. Usually caused by a loose gas cap. If the cap WAS loose, tighten it up and just drive the car, it may take a few days for the computer to run the tests and and confirm that its OK and will turn the light off by itself. If the cap is tight, then make sure the seal is good, if it is, then the leak is somewhere else, usually on Jeeps I find hoses cracked near the canister, so thats where to start if the gas cap is tight and good.

Aug 30, 2010 | Jeep Grand Cherokee Cars & Trucks

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2005chevy colorado check engine light on code code po455.how do i fix


This is an EVAP system code. There is a good chance that you just didn't put your gas cap on tight enough the last time you got gas. Check your gas cap and make sure it clicks at least two times after tightening it. If after doing this and driving for a while, the code doesn't go away, you will need to have further diagnosis done as another component in the evaporative emissions control system could have failed.

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What does diagnostic code PO455


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

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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I get a po455 code on my 2004 grand prix


I had a check engine light on for my gas cap. I fueled up and sometimes it would say "check gas cap" So i just plugged it in under the steering wheel and cleared the check engine light from my dash board. So far so good.

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Engine dies while driving 55-65 mph


I guess the easiest thing would be replace your gas cap, or at least remove it and clean all threaded parts & seal if you haven't already. Erase codes drive it, then re-check.Next check all hoses etc., going to your vapor canister for leak, and canister for any holes.

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Is your gas cap tight? check it, these codes indicate a large leak in the fuel evaporative emission recovery system at the gas tank

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