A coolant temperature sensor is a component designed to feed a value of temperature to the computer. This allows the computer an accurate measure of temperature making it possible to deliver the correct measure of fuel under each type of temperature.
THINGS TO LOOK FOR
The coolant temperature sensor, if faulty, may affect fuel economy but it is very difficult to check. A possible check of the fault codes may determine a faulty coolant temperature sensor. Also removing it and dipping it in water should change the value. This information will be in your Specific Workshop manual.
IS IT EXPENSIVE TO REPAIR?
Most coolant temperature sensors are around $60.00 depending on the make and model.
TEMPORARY REPAIR AND LONG TERM REPLACEMENT
If the price of a new coolant temperature sensor is over the top then you might try the wreckers, but before you fit it, get it tested and keep your receipt just in case.
This article is found in the Virtual mechanic CD Rom
You can download it for the price of a latte, but you will learn not to buy a lemon
By Darren Gow-Brown, Melbourne Australia ©2009