Serious Explorations Ford Explorer and Ranger Message Board
#1 Resource for Ford Explorers and Rangers for 20 years 1996-2016

Searches Only

Ford Explorer Generation Guide

2017 Explorer Forums Elite Membership Chat Elite Rides Reviews Gallery
Go Back   Ford Explorer and Ranger Forums "Serious Explorations" > Ford Explorer Ranger Repair - Troubleshooting - Modifications & Detailing Forums > 1995 - 2001 Explorer Ranger Mountaineer - Sport thru '03 - 2nd Generation > Stock 1995 - 2001 Explorers


Stock 1995 - 2001 Explorers Questions related to non-modified 1995-2001 Explorer, Mountaineer, Ranger and '02+ Sports and Sport Trac. Problem solving, maintenance, TSB, service bulletins, owner reviews, specifications.

P0443 error code / fuel pipe flap...

Thread Tools
Old 06-04-2013, 05:05 PM   #1
2003 Explorer Sport XLT
Join Date: Oct 2007
Posts: 44

Vehicle Specs

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
(Original Poster)
P0443 error code / fuel pipe flap...

I've noticed the Check Engine light a few times over the last year come on and off. I've looked up the code and what it means however wanted to toss this out also...

Wife came home last year a month or so before I had this issue. She said she stopped for gas and when finished she noticed the small trap/flap on the fill hole stayed about 3/4 open.. Ie it didn't fall down to cover the hole. This isn't the gas cap but what appears to be a small spring loaded cover in the fill tube.

Could this be the cause for the occasional P0443 code? I've seen it come on for weeks then turn off for a month on its own. If clear the code it might stay off for another month or can turn back on 2 days later.


2003 Ford Explorer Sport XLT V6 4.0L FI SOHC 4x4
Security Keyless Keypad Code Location 2003 Explorer Sport XLT
Adrenolin is offline   Reply With Quote
( Join the Elite Explorers )

Join the Elite Explorers for only $20 a year

Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose and fix problems yourself, and learn which modifications really work without having to experiment on your own. Elite Explorer members can change the forum "styles" to eliminate most ads, including the blue underlined links, and no ads on photos. Other benefits include the ability to store 1000 Private Messages, add your own avatar to your posts, upload photo attachments directly to your posts and to our Photo Gallery and more. Join the Elite Explorers today. Your support of the forum is greatly appreciated.

Old 06-04-2013, 10:48 PM   #2
Elite Explorer
Watertown, NY
jremington59's Avatar
1997, 99 and 2000 5.0's
Join Date: Oct 2009
Posts: 1,949

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 142 Post(s)
P0443. What does that mean?

The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set.

Potential Symptoms

P0443 trouble code symptoms could be just an malfunction indicator lamp (MIL) illumination. There may be no drivability problems at all. But, it's also possible to have a lean condition or a rough running engine if the purge valve is stuck open. Usually though, these symptoms are accompanied by other EVAP codes. Another symptom may be excessive pressure in the gas tank in the form of a "whooshing" sound when the cap is removed, indicating a purge valve that isn't working at all or stuck closed.


To cause a P0443, there has to be a problem with the purge control CIRCUIT, not necessarily the valve. Usually they are a unit housing the valve and the solenoid as an assembly. Or it could be comprised of a separate solenoid with vacuum lines to a purge valve. That said, it could be any of the following:
• Bad purge solenoid (internal short or open)
• Wiring harness chafing or rubbing another component causing short or open on control circuit
• Connector worn, broken or shorted due to water intrusion
• Driver circuit inside powertrain control module (PCM) is bad

Possible Solutions

1. Using a scan tool, command the purge solenoid to activate. Listen or feel for a clicking coming from the purge solenoid. It should click once, or on some models it may click repeatedly.

2. If it doesn't click with scan tool activation, unplug the connector and examing the solenoid and connector for damage, water, etc. Then check for battery voltage on the feed wire with the key on. If you have battery voltage, then ground the control side manually using a jumper wire and see if the valve clicks. If it does, then you know the solenoid is working properly but there is a problem with the control circuit. If it doesn't click when you manually ground it, replace the purge solenoid.

3. To check for a problem on the control circuit (if the solenoid tests okay and you have voltage to the solenoid) plug the solenoid back in and remove the control circuit (ground) wire from the ECM connector (If you're unsure how to do this, do not attempt). With the ground wire removed from the ECM, turn the key on and then manually ground the Purge valve control wire. The solenoid should click. If it does, then you know there is no problem with the control wire to the solenoid and there is a problem with the ECM purge solenoid driver circuit in the ECM. You'll need a new ECM. However if it doesn't click, then there must be an open in the wiring between the ECM and and the solenoid. You must find it and repair it.
jremington59 is offline   Reply With Quote

Suggest this thread to friends:

Similar Threads
Thread Thread Starter Forum Replies Last Post
How To: Ranger Fuel Filler hose Swap and Bed Removal Tbars4 Ford Ranger - Mazda B-Series Forum 15 01-12-2015 04:49 PM
Fuel Gage Issue 907trac 2001-2005 Explorer Sport Trac 8 07-01-2014 10:32 PM
Ford Explorer 2002 fuel pump replacement Norman M Johnson New Member Introductions 2 04-23-2013 10:42 AM
Fuel Filler Pipe Stenasev UK Explorer Owners Forum 18 12-13-2012 06:07 PM
Fuel pressure loss in fuel rail crmorrison3 Stock 1991 - 1994 Explorers 6 01-23-2009 12:56 PM

Join the "Elite Explorers" Today!

Top of Page

Thread Tools

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

Forum Jump

All times are GMT -5. The time now is 01:41 PM.

US Flag
We Support Our Troops!

Copyright 2016 - 1996 Rick Horwitz Photography Explorer Forum is celebrating it's 20th birthday!!

Ford Motor Company is not involved in the management of this site in any way.

All tips on this site are for use at your own risk and discretion.

Modifying the suspension on any vehicle will cause changes to its handling characteristics.

Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.