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I am trying to locate the coolant tempeture sensor, I changed the coolant switch on the intake close to theromastat, But where is the coolant temp sensor
 

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Welcome to Allpar. There are 2 temp sensors/switches in the vicinity of the thermostat. The single violet wire temp sensor is for your dash temp gauge. The 2-wire temp sensor is for the PCM to control engine functions.
 
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