Engine Coolant Temperature Sensor for 2000 S10 - S-10 Forum
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Engine Coolant Temperature Sensor for 2000 S10

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Old 07-21-2012, 02:09 AM   #1
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Engine Coolant Temperature Sensor for 2000 S10

This is just an FYI, for a 2000 s10 2.2L, if your gauge for the engine coolant temperature starts malfunctioning and your drive-ability becomes an issue, it will, you only need to replace the engine coolant temperature sensor. To me it is common sense that if you see a gauge malfunction and drive-ability becomes an issue, especially concerning the ECT, that the sensor input that is driving the gauge is also tied to the input of the engine controller. However, I looked up on line and I read in more than just one place that there is both an ECT sensor and sending unit and a guy at NAPA argued with me this same thing, until I pointed out that the ECT sensor and the sending unit/switch that they sold was the same part number just with different names. So I picked up my ECT sensor and replaced it. It is underneath the air intake box, this box needs to be removed to replace it. When I seen my old one, it wasn't necessarily that the sensor was bad, but the connector had broken off. It's no surprise considering that the intake literally sets on the sensor. So I replaced it, a 15 minute job, started my truck and took it for a few mile drive and the gauge no longer malfunctioned nor was drive-ability compromised.

I just hope this helps someone, because I got a lot of conflicting information from the internet and even from an auto parts store. It appears the sensor voltage is either a direct input to the engine controller or the input is shared with the gauge. I think the input goes into the engine controller and information from the controller is sent out via a bus the to instrument cluster.
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