LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

SES Light Went On

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Old Oct 15, 2003 | 02:42 PM
  #1  
vinnyxgunz's Avatar
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From: new jersey, usa
SES Light Went On

I was driving on the parkway and all of a sudden my SES light went on. I looked at all the gauges and I noticed my temperature meter wasen't moving. It was stuck on about 140 and the fans were running. Later on I noticed the fans are on non-stop. What's my problem? I'm guessing thermostat?
Old Oct 15, 2003 | 03:08 PM
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350 HRSS's Avatar
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From: Henry, VA USA
You need to have someone hook up a scanner and find out what the code is. Then, let us know the code, or look it up in a Haynes.
Hard to guess in a situation like this.

Good luck and let us know!
Old Oct 15, 2003 | 03:14 PM
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Since he has a 1993, he doesn't need a scanner. The code is stored in the ECM, and he can retrieve it by shorting two pins on the ALDL connector, and flashing the code on the SES light.
Old Oct 15, 2003 | 03:34 PM
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Originally posted by Injuneer
Since he has a 1993, he doesn't need a scanner. The code is stored in the ECM, and he can retrieve it by shorting two pins on the ALDL connector, and flashing the code on the SES light.
so how does he do that :P

and when a SES light comes on, i think the fans always stay on
Old Oct 15, 2003 | 04:11 PM
  #5  
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my transmission mount has been bad for about 3 weeks now... could this be causing the SES light to go on? the car is running exactly like it always does
Old Oct 15, 2003 | 04:16 PM
  #6  
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Shoebox's guide to flashing codes on a 1993

There is no diagnostic for the tranny mount. There is no diagnostic for the thermostat. It is not unusual for some DTC codes to also turn the fans on. That is a very common occurence when you get the code for the AIR pump.
Old Oct 15, 2003 | 05:03 PM
  #7  
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Seeing the temp low and the fans on is a result of the SES, not the cause. Flash out the code so you will know what to deal with.
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