5.4 engine light on.
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5.4 engine light on.
I have a 2004 5.4 motor. The engine light just popped on, its a P0455, which is an evap light, says gross leak. The light is not due to gas cap, that has its own code. I know what to do with evap problems, BUT are there any usual culprits with this 5.4 system? I am so sick of this evap crap, I just finished pulling my hair out with my beater car evap light. Thanks guys.
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Well I just did a google of "P0455" and its says to remove/re-install gas cap, but my book of codes says the cap has a separate code. I know the gas cap trick to remove/re-install *or* replace, is always first thing to try, so ill do it anyways.
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Haven't really heard of any big issues with the evap system on the SD's.
Broken hose, loose hose, rotted through filler neck, gas cap (of course), etc.
Just because their is a separate code for the gas cap doesn't mean the cap can't make a "gross leak" code. These SD's are trucks and are not as stringent on their OBD-II compliance, and as a matter of fact, they aren't required to be OBD-II compliant until 2007 or so, even though the 2005 and up are.
Here's some good reading on it, and you can find the link for the 2004 document here too:
https://www.ford-trucks.com/forums/5...t-come-on.html
Broken hose, loose hose, rotted through filler neck, gas cap (of course), etc.
Just because their is a separate code for the gas cap doesn't mean the cap can't make a "gross leak" code. These SD's are trucks and are not as stringent on their OBD-II compliance, and as a matter of fact, they aren't required to be OBD-II compliant until 2007 or so, even though the 2005 and up are.
Here's some good reading on it, and you can find the link for the 2004 document here too:
https://www.ford-trucks.com/forums/5...t-come-on.html
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mcdev
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Dec 9, 2007 09:23 PM
