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Old 03-18-2014, 11:12 AM   #1
dennisbarrett's Avatar
Join Date: Mar 2014
Vehicle: 2003 mustang pony
Location: wa
Posts: 2
Default Evaporative,,,,,,,,,,,

I have a 2003 pony. Just had to have the fuel pump replaced. A week later, for the first time ever, this car has 112,000 miles on it, my 'service' engine light came on, and then a week after that the 'fuel cap loose' light also came on. My friend has a code reader,and the codes that popped up were P0455, and P0457.
So, 0455 lists as "Evaporative Emission Control System leak (gross leak), and 0457 says gas cap loose. Haha, no kidding, right? So i bought a new gas cap for the 0457 code. We will see if it keeps it off.
My big question, is, for the 0455 code, what do I need to do to fix it, and also, is this all related to the new more powerful fuel pump my mechanic installed?
Look forward to any advice I can get.
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Old 03-18-2014, 02:52 PM   #2
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Join Date: Aug 2008
Vehicle: 08 GT Vert, 02 GT Vert
Location: Panama City, FL
Posts: 1,213

The new cap could clear both codes eince the cap is part of the emmissions system.
Retired USAF
Panama City, Fl.
I wake up in the morning with nothing to do and by supper time, I have half of it done.

2008 GT Vert, stock
2000 Lightning, s/c, tuned, Basanni, built tranny
Previous Mustangs:4 - '66 Coupes(silver/blue/grey/red) '87 GT HO, '00/'02/'07 GT Vert(red)(grey)(black), '68 Coupe, '11 GT/CS
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Old 03-19-2014, 10:43 AM   #3
dennisbarrett's Avatar
Join Date: Mar 2014
Vehicle: 2003 mustang pony
Location: wa
Posts: 2

Ok, thats what I am hoping for. Thanks for the reply.
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Old 03-19-2014, 10:43 AM
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