Re: Check Engine light on after long decent - Saab 9000 Bulletin Board - Saabnet.com
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Re: Check Engine light on after long decent
Posted by BobS (more from BobS) on Mon, 14 Jan 2002 23:07:49
In Reply to: Check Engine light on after long decent, RJS, Mon, 14 Jan 2002 01:40:04
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It's possible the engine ECU thinks the engine is too cool. Making long decents with the engine in fuel cutoff can cause engine temperature to get below the normal level maintained by the thermostat. The ECU is fairly smart, it keeps track of engine revolutions since start and will make assumptions of engine temperature based on accumulated revolutions. This code may go away on it's own after a number of starts without the fault condition occurring again.
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