Code P0455, How to troubleshoot? - F150online Forums

Go Back  F150online Forums > Powertrain & Mechanical > V8 Engines
Code P0455, How to troubleshoot? > Code P0455, How to troubleshoot?

Code P0455, How to troubleshoot?


Old 11-24-2003, 11:45 AM
Junior Member
Thread Starter
Join Date: Dec 2002
Location: Oviedo, FL
Posts: 1
Code P0455, How to troubleshoot?

Hi all,

My dad's 2000 F150, 4.6 engine threw the P0455 code. My book says this "Evaporative Emission Control System Leak Detected".

We reset the code once but it came back. We would like to fix it but have no idea where to start.

Any help would be great!

Reply With Quote
Old 11-24-2003, 01:03 PM
Senior Member
Join Date: Sep 2000
Location: Mpls, MN
Posts: 1,704
It's a fuel system leak code/Evap system not holding pressure.

If you're lucky, it will be a loose fuel cap, the result of fueling while the engine is running, maybe a loose or cracked hose leading from the fuel tank to the filler neck. If you can't find the leak yourself, best bet is to bring it to a Ford dealer. They will run smoke through the system to locate the leak.

This can be a rather difficult one to track down on your own.
Reply With Quote
Old 11-24-2003, 01:22 PM
Senior Member
Join Date: Feb 2001
Location: Imperial,Mo.
Posts: 133
I just fixed that same problem on my 98. Check between the battery and firewall. There is a vacumm line connector with 3 small and 1 large vacumm line. Mine had chaffed against the battery and wore a hole in 2 lines. After repairing the lines and resetting the computer all is well now.

Last edited by Lou Colmo; 11-24-2003 at 02:21 PM.
Reply With Quote

Related Topics
Thread Starter
Last Post
06-06-2017 05:00 PM
1997 - 2003 F-150
02-21-2017 03:29 PM
2004 - 2008 F-150
04-06-2016 12:12 AM
V8 Engines
11-05-2015 07:18 PM
2004 - 2008 F-150
10-02-2015 03:27 PM

Thread Tools
Search this Thread
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT -4. The time now is 04:08 PM.

  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: