Cadillac STS Forum - 2005 through 2012 Discussion, Outside temp sensor and car washes - issue in Past Cadillac Vehicle Discussion; Anyone else have this? When I wash the car, the outside temperature reads 10 to 15 degrees low for several ...
Anyone else have this? When I wash the car, the outside temperature reads 10 to 15 degrees low for several hours afterwards. It will eventually go back to normal, but it takes a really long time.
I'm pretty sure that sensor is behind the grill and, of course, gets wet when I spray the grill. I'm thinking the sensor probably has a problem, but if other people say they have this, I won't worry about it.
Also, anyone have the part number for this sensor?
Automobile(s): 2008 STS - Grey/Black Northstar NAV
Re: Outside temp sensor and car washes - issue
Speaking from having had 2 Vettes, the OAT sensor may not read correctly until the car has been driven for 3 miles or more at a speed in excess of 25 MPH. This is part of the computer processing that helps protect the HVAC system.
Mine reads consistently 3 degrees above actual temperature. Don't know why. Hardly think the OAt is bad with only 16k on an 08
Thanks Guys! The evaporation thing makes sense, but I'm surprised that it lasts so long. I'm talking about driving well above 25 for a long time. Based on what you're saying it's probably normal. I think the sensor is really cheap, although it's hard to nail down the part on the Web sites I've been looking at. I might try it sometime if it is cheap just to satisfy myself. I'll update if I do.
I had a 2000 Deville before my current 05 STS, and rented cars straight for 18 months for work. Both caddys and every rental I washed and had a temp gauge did the same thing. I always leave the display on temp so I noticed it alot. Some of the cars rented were sts cts maxima charger 300 m35 Aspen, and more all 2008 and 2009.
So o don't think anything is wrong. I think that's just the way it is.
I have a slightly different problem with the outside temperature sensor on our 2004 DeVille. Starting this summer, the outside temperature display began to read higher than the actual outside temperature but it still seemed to go up and down with the ambient temperature. However, lately it is always reading very high. For example, it is currently 55 degrees outside but the temperature reading on the display says 133! To get heat we have to run the temperature setting up to the max. Does that make sense?
I'm guessing (hoping) that the problem is due to a bad sensor. I'd like to replace it but can't find it. Could someone tell me where it is located?