• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Check Engine Light On After Upgrade ?

  • Thread starter Thread starter SF Lex
  • Start date Start date Mar 15, 2016

SF Lex

Advanced Member
Mar 8, 2016
230
125
73
CoCo County, California
Mar 15, 2016
#1
  • Mar 15, 2016
  • #1
I recently upgraded my throttle body, with a extension EGR plate, mass air sensor, plus a cold air intake, all BBK. All runs well, but the check engine light is on? Did anyone have this same issue ? Wondering how i can turn it off? or if anyone has any experience and knows why ? Will it come back on after i get it turned off ? Not sure what i have to do now.
Thanks
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,176
17,879
224
Massachusetts
Mar 15, 2016
#2
  • Mar 15, 2016
  • #2
SF Lex said:
Not sure what i have to do now.
Click to expand...

Pretty simple. Run the codes, and see what's wrong. Then go from there.

There is a jumper wire method to run codes, or just buy the reader

http://www.summitracing.com/parts/ino-3145



DID you plug the MAF and EGR sensor back in?
 
Reactions: SF Lex

jrichker

StangNet's favorite TOOL
In Remembrance. Thank you for your contributions
Mar 10, 2000
27,512
2,811
234
Dublin GA
Mar 15, 2016
#3
  • Mar 15, 2016
  • #3
Dump codes sticky

Look at the top of the 5.0 Tech forum where the sticky threads are posted. One of them is how to dump the computer codes. I highly suggest that you read it and follow the instructions to dump the codes. http://www.stangnet.com/mustang-forums/threads/how-to-pull-codes-from-eec4.889006/
 
Reactions: SF Lex
You must log in or register to reply here.

Similar threads

Hard to start when engine is cold
  • 86_Capri
  • Mar 11, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
31
Views
763
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Mar 21, 2026
86_Capri
D
Fuel pump upgrade
  • dkrupp79
  • Jul 7, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
227
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 10, 2025
Scrapla347
7
Engine Random hanging idle
  • 706 Saleen
  • Feb 11, 2026
  • Fox 5.0 Mustang Tech
Replies
9
Views
443
Fox 5.0 Mustang Tech Feb 19, 2026
86HO5.0
8
A
Resolved Electrical Help Please
  • Alabama
  • Jan 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
249
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 22, 2026
AeroCoupe
D
Turn signals work only with ignition on & Engine off.
  • DienstXIV
  • Jul 2, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
7
Views
507
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jul 7, 2025
DienstXIV
D
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?