Hot answers tagged sensor
Sounds like the temperature sensor is broken. A new one is $40-$55, and it's a 30 minute job to replace if you've never done it before (it lives behind the grill in front of the radiator). Not uncommon for these to fail on Subarus and give weird readings. Following Paulster2's comment, here's an image of what the sensor looks like; In this image (of a ...
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