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Why is my 2010 ford fusion is throwing code po455. no gas cap required

Why is my 2010 ford fusion is throwing code po455. no gas cap is required.

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P0455 is Evaporative Emissions System Leak Detected (Large) and means that there is a large leak in the system probably with one of the EVAP hoses near the fuel tank or EVAP canister or maybe even A leaky purge valve.

Posted on May 06, 2014

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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Apr 10, 2009

john631068
  • 172 Answers

SOURCE: 2000 Dodge Intrepid with PO455 code and stalling.

A code 455 most likely one or more of the following has happened
a loose or bad gas cap
a non-conforming gas cap
other leaks or damage pieces in the evap system

Inspect the evap system for cracks or breaks in lines listen for vacume leaks or strong gas fume smell and fix all lines you find that are damaged ..I know you say you put a new gas cap but make sure it a conforming cap..Hope this helps

Posted on Nov 14, 2009

Testimonial: "Thank you!! I will def. tell my husband to check it out!! Thats the only code that comes up. So I hope this will help."

SOURCE: ford trouble codes po442.......po455.where to look

EVAP Codes. You will have to go thru entire evap system,looking for a small leak (po442) Hoses,Switches,Valves etc. See if you can borrow a smoke machine.

Posted on Mar 16, 2010

  • 154 Answers

SOURCE: Ford Merc PO455 Gross evap leak, could it be gas

gas cap, clean the maf sensor, check for vacuum leaks. i would start with those.

Posted on Apr 24, 2010

raineman_15
  • 273 Answers

SOURCE: KEYLESS ENTRY CODE FOR 2010

They are all different. The only way to get that code is out of the owners manual on a card that comes with it or at a Ford dealership where they can put their diagnostic computer on it and pull up the code.

Posted on Mar 02, 2011

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2000 ford windstorm 3.8l code Po455 what to check?


code p 0455 refers to evaporative emission (EVAP) system--large leak===causes ---hose connections--intake leak---EVAP canister--EVAP canister purge valve
or simply-- the gas cap not on tight after a refill ( first check)

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I have po455 in this car


First thing I would try is, buy the correct gas cap, install it and reset the code. Drive it for a few days and see if the code comes back. Your car is 10 years old, so I suspect a worn seal on your current gas cap.

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Possible causes
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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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Have a 2010 Ford Fusion check engine light came on had it scanned at Autozone. Code stated that it was my O2 sensor. Now my check fuel fill inlet warning has came on. I do not have a gas cap, it is the...


I know my barrina when gas cap was missing had check engine light on did diagnostic said o2 sensor as well so got a cap from gas station reset computer now no lights on everything fine had something to do with pressure in tank not right

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1 Answer

I have a code po455


this is a code that indicates a large evap leak. this can be caused by allot of things. things like loose or bad gas caps, leaking evap line. bad vent sol. bad puge valve. this requires a high end scan tool and a smoke machine to isolate the problem. first thing to look at, check gas cap for being tight. also look at the seal on gas cap and make sure it has no cracks in it.

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1 Answer

Ford fusion gas cap light keeps coming on


Any number of EVAP System issues

What was the code?

A small leak doesn't just have to be a gas cap

Have the system smoke tested

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Ford Merc PO455 Gross evap leak, could it be gas


gas cap, clean the maf sensor, check for vacuum leaks. i would start with those.

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1 Answer

2003 ford taurus diag code po455 & po457 how do I get the codes resolved


check your gas cap. make sure it's tight and the gasket is intact

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