I believe it’s on the water crossover pipe under the intake. There are technically two coolant sensors. One is silverish with a single spade connector for the guage. The other should be brass with a plastic connector on it, that’s for the ECU.Can anybody tell me where I can find the above on 2011 2.5i ? Want to check/ replace as I'm getting intermittent hesitation / spluttering when engine is cold. Thanks.
I don't have any data on when the blue light should go out. @scoobydoo2 has reported coolant temperature versus lights on/off (http://www.subaruoutback.org/forums...en-intake-temperature-engine-temperature.html) and perhaps might also have the temperature at which the blue light normally goes off.Thanks again plain om. The service manual refers to the CTS as a possible cause of my symptoms, especially if they only occur at lower temperatures. It also lists map,maf, crank,cam, throttle control etc but specifically mentions CTS at cold temps.lve hooked up active OBD and the blue light goes out when the coolant temperature reaches about 49 Deg celcius (120 Deg f). Does this seem about right?