GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

error code P0456

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Old Nov 21, 2006 | 05:30 PM
  #1  
AmericanMuscle4.6GT's Avatar
AmericanMuscle4.6GT
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Default error code P0456

thats what my check engine light, i think its "evaporative emissions or something"

any ideas?
Old Nov 21, 2006 | 10:23 PM
  #2  
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06GT4RAD
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Default RE: error code P0456

I do not have the current codes but that code is normally related to a small EVAP System leak Usually the gas cap. Did you get gas recently? If so you may not have gotten the cap on tight.

Richard
Old Nov 21, 2006 | 10:29 PM
  #3  
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KdF
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Default RE: error code P0456

EVAP Emission Control system leak very small
Old Nov 21, 2006 | 10:43 PM
  #4  
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Default RE: error code P0456

ORIGINAL: 06GT4RAD

I do not have the current codes but that code is normally related to a small EVAP System leak Usually the gas cap. Did you get gas recently? If so you may not have gotten the cap on tight.

Richard
well here's what happened. noticed it a couple days after i got gas at about half tank. checked the gas cap, it was on tight. 5+ "driving cycles" and one monster burnout later, its still on. so i checked the code with a friends tuner. P0456. just as i suspected. but it's not going off for some reason. i'll have to inspect the cap tommorow carefully. also someone said something about a vacuum line being loose?
Old Nov 22, 2006 | 12:02 AM
  #5  
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Default RE: error code P0456

if you want to get rid of the light, use the tuner to clear it or unhook your battery cable and see if it comes back...damn epa and their evap..if they had to work on it they would think otherwise....
Old Nov 22, 2006 | 12:05 AM
  #6  
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06GT4RAD
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From: Nor Cal
Default RE: error code P0456

Use the tuner to clear the light and then drive it. Once the code is set it normally will not go out until cleared properly

Richard
Old Nov 22, 2006 | 12:11 AM
  #7  
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Haze28
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Default RE: error code P0456

My 2001 GT had this problem, dealership wanted to charge me $450 to change a vaccum line. I got a new gas cap, cleared the code and never had another problem.
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