Mystery SES light - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 07-19-2007, 01:03 PM   #1
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default Mystery SES light

No, I haven't pulled the code yet, it'* raining like a **** and I was late... It came on during my drive to work, about 60 mph, cruise on. It kicked the cruise off, and the light went away after about 5 seconds. No odd gauge readings or sounds and I could turn the cruise back on immediatly. Lets hear some guesses...
J Wikoff is offline   Reply With Quote
Old 07-19-2007, 01:39 PM   #2
Junior Member
 
Join Date: Mar 2003
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
vital49 is on a distinguished road
Default

TPS.
vital49 is offline   Reply With Quote
Old 07-19-2007, 01:40 PM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Sorry John.. as a first guess I'd say IAT like Gumball has recently.

However since your car can pull the codes w/o a reader.. if you were in the car, I kind of expect codes.
BillBoost37 is offline   Reply With Quote
Old 07-19-2007, 02:04 PM   #4
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

I was late for work, hence the no codes... But it did stop raining so I went outside. Vital halfway wins. It is the TPS voltage, but he didn't say high or low. It is indicated high.
J Wikoff is offline   Reply With Quote
Old 07-19-2007, 03:03 PM   #5
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

An IAT wouldn't have kicked off the cruise, anyway.

Corrosion or a loose connector? Water in the connector?

Your car is female?
willwren is offline   Reply With Quote
Old 07-19-2007, 03:05 PM   #6
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Possibly loose. I had it apart a couple days ago to pull the fuel rail.
J Wikoff is offline   Reply With Quote
Old 07-20-2007, 11:35 AM   #7
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

The connection isn't loose. I reseated it and still duplicated the problem this morning. Cruise at 60, going enough downhill that the cruise just barely cracks the throttle to maintain speed, after 10 or 15 seconds it happens. I figure just a minor tweak of the TPS should cure it.
J Wikoff is offline   Reply With Quote
Old 07-20-2007, 12:20 PM   #8
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

What was the code?

The cruise on that year car is typically having an issue, therefore I discounted it to begin with. Why would cruise cause an SES?
BillBoost37 is offline   Reply With Quote
Old 07-20-2007, 12:33 PM   #9
Senior Member
Certified Car Nut
Thread Starter
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Code 21. I think it has to do with holding the throttle barely open for so long. The PCM doesn't like the TPS voltage at that point and lets me know after so long. And since the PCM uses the TPS to help the tranny decide what to do, it kicks off the cruise so it doesn't make any bad decisions.
J Wikoff is offline   Reply With Quote
Old 07-20-2007, 12:41 PM   #10
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Dead spot in the sensor. Any fault from the TPS will kill cruise. It needs that input to regulate speed.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1989 SES light 2x4 1987-1991 8 07-29-2003 04:42 PM
ses light. making me mad buzzbomber88le 1987-1991 5 05-01-2003 10:20 PM
SES light comes on when i coast. 93-SSEI- 1992-1999 3 04-23-2003 12:31 AM
SES light SSEi95 General GM Chat 9 03-23-2003 11:18 PM
Rough tranny shift & SES Light illumination dsmorse 1992-1999 4 01-09-2003 02:09 PM


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 Off
Refbacks are Off



All times are GMT -4. The time now is 06:17 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.