Check Engine Light 1991 C4
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4th Gear
Joined: Aug 2013
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Check Engine Light 1991 C4
I have a 1991 coupe model that seems to have a faulty temp sensor and the check engine light comes on. I think it is a temperature sensor because during the drive in the morining while it is cooler, the light doesn't come on. In the heat of the afternoon it does come on. The engine guage however reads relatively cool even though the light comes on. Are there 2 different sensors?
Race Director
Joined: Feb 2003
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From: Kingman AZ
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Read the first one on the list here. In fact - read the entire section. You will learn a bunch
http://forums.corvetteforum.com/c4-g...ps-w-pics.html
http://forums.corvetteforum.com/c4-g...ps-w-pics.html
Safety Car
Joined: Jan 2004
Posts: 3,556
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The temp gauge sender is completely independent from the coolant temp sensor (CTS ) that sends the engine temp
signal to the computer that generates the SES light.
Read
http://forums.corvetteforum.com/c4-t...-ecm-temp.html
Pull the codes as described in the link to see why the SES light is showing
Last edited by vetteoz; Aug 3, 2013 at 02:30 AM.
