• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Very strange...SES light not coming on but bulb is good

  • Thread starter Thread starter Tinkerbell_too
  • Start date Start date Mar 17, 2008
T

Tinkerbell_too

New Member
Sep 7, 2006
15
0
0
Georgia
Mar 17, 2008
#1
  • Mar 17, 2008
  • #1
I have a 03 GT with 92,000 miles. Car has been having what we thought was an intermittent issue. A week ago, it threw a code. We replaced the sensor that it was coding for and reset the computer (i.e. disconnected the battery for 20 minutes). The check engine light never came on again, but the sensor problem did. We knew the bulb wasn't blown, because when you put the car in accessory position, the light comes on. So, for the heck of it, we took it to Autozone to see if they could pull a code. We were told that they couldn't pull a code if the check engine light had not come on. We asked them to check it anyways. They did, and sure enough, there was the same code stored in the computer. So, my questions are:

1. Did we properly clear the code??

2. Does this sound like a potential computer failure?

To paraphrase, if the car is throwing a code, the check engine light is not coming on, the bulb is good -- is the ECM bad?

The car is out of warranty, so I would prefer not to have to take it and pay for them to determine what I think we already have.
 

jstreet0204

Active Member
Jun 26, 2003
939
0
36
Winston Salem, NC
Mar 17, 2008
#2
  • Mar 17, 2008
  • #2
I answered this in your other thread. The light doesn't always come on right a way. Depending on the code it will wait a few driving cycles to before it shows the light to see if it is a fluke or a valid problem.
 
T

Tinkerbell_too

New Member
Sep 7, 2006
15
0
0
Georgia
Mar 17, 2008
#3
  • Mar 17, 2008
  • #3
What would you consider "a few cycles"? This has been going on for one week today....meaning I have restarted the car over 20 times and had the problem every time I have started it.....
 
You must log in or register to reply here.

Similar threads

P
2000 GT Random Power Loss
  • Pinellas50
  • Mar 9, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
314
SN95 4.6L Mustang Tech Mar 23, 2026
Pinellas50
P
T
Looking for some help with 2006
  • thedudeillest
  • Mar 16, 2026
  • 2005 - 2014 S-197 Mustang -General/Talk-
Replies
14
Views
481
2005 - 2014 S-197 Mustang -General/Talk- Mar 20, 2026
Noobz347
T
2003 GT cluster issue
  • Timothys gourmet
  • Aug 26, 2025
  • SN95 4.6L Mustang Tech
Replies
3
Views
215
SN95 4.6L Mustang Tech Aug 28, 2025
Mustang5L5
Tuners come on inside
  • squeak93
  • Feb 13, 2026
  • SVT Tech Forum
Replies
1
Views
261
SVT Tech Forum Feb 20, 2026
squeak93
A
Check Engine codes jumping around
  • azactor
  • Jan 9, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
191
1996 - 2004 SN95 Mustang -General/Talk- Jan 10, 2026
gkomo
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
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?