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Go Back   REVscene Automotive Forum > Technical Discussion > Maintenance, Engine & Driveline Tech

Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..

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Old 06-14-2009, 03:50 PM   #1
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Relation Between Emissions & Water Temp Sensor?

I'm wondering if there's any correlation between an aircare-failing vehicle and a possibly malfunctioning coolant temperature sensor.

Does the coolant temperature sensor have other purposes than simply controlling the needle on the water temp. gauge in the cluster?

Last edited by autobacs; 06-14-2009 at 05:22 PM.
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Old 06-14-2009, 07:35 PM   #2
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the coolant temp sensor is for the ECU, if it's malfunctioning then the ECU will think it's cold, and it will run rich. there is a separate sensor for the gauge, usually 1 wire
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Old 06-14-2009, 07:49 PM   #3
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It can also trigger a relay that will kick your "high" fan on/off.
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