How to turn off Check Engine Light - F150online Forums

How to turn off Check Engine Light

Thread Tools Search this Thread
Old 03-16-2007, 10:18 AM
Thread Starter
Join Date: Feb 2007
Posts: 40
How to turn off Check Engine Light

I changed one of my COPs last night. It was coil #5 and now my engine runs great. However, the check engine light is still on. How can I turn it off?

Reply With Quote
Old 03-16-2007, 10:19 AM
Join Date: Nov 2004
Location: NW Indiana
Vehicle: 1998 Ford Expy 5.4
Posts: 1,941
take it to any autozone. They will do it for free
Reply With Quote
Old 03-16-2007, 11:04 AM
Senior Member
Join Date: Sep 2003
Location: WY
Vehicle: 2007 Ford F-150
Posts: 1,104
If you actually fixed the problem, it should turn itself off. If memory serves me correctly (and it probably doesn't) the local repair shop said to me many years ago you had to have 5 starts and drive at least 40 some-odd miles for the light to clear (or something along those lines).

Or, go to Autozone.

Or, go to Harbor Freight on-line and buy a $40 code reader. It'll reset the light.
Reply With Quote
Old 03-16-2007, 12:15 PM
Senior Member
Join Date: Dec 2006
Location: Reisterstown, MD
Vehicle: 2002 Ford F150
Posts: 438
unhook your battery for a while, That should clear the code.
Reply With Quote
Old 03-16-2007, 01:15 PM
Technical Article Contributor
Join Date: Oct 2005
Location: MI
Vehicle: 1998 Ford F150 5.4L 4X4
Posts: 25,637
You shouldn't have a light if you followed the correct procedure with a COP changout.

Step 1 - Disconnect Neg terminal on battery..
Reply With Quote
Old 03-16-2007, 01:32 PM
Senior Member
Join Date: Oct 2002
Location: St. Louis (Out in the woods)
Vehicle: 2001 Ford F250 6.8
Posts: 5,872
If you unhook your battery now, you'll have to reprorogram all your radio stations.

Just look in your owner's manual for the fuse layout. Locate the fuse for "PCM". This is usually a 5A or so fuse. Pull it and wait 15 minutes. Reinstall it and allow your PCM to relearn parameters.

exactly which fuse varies by model year which you failed to provid. For example, on a 97, it's in the underhood mini-fuse box. A 2000 uses F2 in the underdash fuse panel, etc.....

Anyway, just look in your owner's manual.

Reply With Quote
Old 03-16-2007, 01:42 PM
Senior Member
Join Date: Mar 2005
Location: Louisiana
Vehicle: 1999 ford f-150
Posts: 784
Fix it
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
2015 F150 Problems Vanwilder01 2015 - 2016 F-150 31 08-04-2016 03:07 PM
5.4 issues - misfire Chalk V8 Engines 27 03-11-2016 01:05 PM
Alarm and starting problems 1994 kingjrza Electrical Systems 1 07-28-2015 04:12 PM
2008 4.6 4x4!! Need advise Jfreas1 V8 Engines 1 07-18-2015 11:34 PM
Truck sputtering Leowis1 2009 - 2014 F-150 6 07-18-2015 12:09 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Refbacks are Off

All times are GMT -4. The time now is 10:21 PM.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Fordé is a registered trademark of the Ford Motor Company