service engine soon, 93 lesabre

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  #1  
Old 12-30-05, 09:49 AM
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Join Date: Dec 2005
Location: minnesota
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service engine soon, 93 lesabre

My service engine soon light comes on in my lesabre. It stays on after starting, goes off when I accelerate, and comes back on when slowing down. It shifts a lot at highway speeds. It never did this before the light came on. I looked up other sites and comments and it was mentioned that it could be the throttle position sensor causing this. Is this a possibility? The cruise control keeps disengaging when the car shifts also.


thanks for any help

jimco
 
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Old 12-30-05, 11:52 AM
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Join Date: Apr 2003
Posts: 174
Look under the steering wheel, there is a connector, OBDI connector. Jumper the 2 top right pins (top row, all the way to the right, those 2 pins). Turn the key on, do not start. The SES light will start blinking in a series (1 blink, pause, 2 blinks = 12)( 4 blinks, pause 3 blinks = 43, ect.) record those blinks and report back to help diagnose further.
 
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