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Old 03-12-2007, 12:33 PM   #1
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I bought a 2005 GXP on Saturday to replace the 2003 SSEi that got T-boned almost two weeks ago and coming home from Jacksonville the outside temperature seemed accurate. I went out yesterday to take it for a drive and the outside temperature reading appeared 15-20 degrees too low and it never changed. It'* still under warrantee, but if there'* something simple I can do I'd rather do that, if possible. Any ideas? Anybody else have this problem? Otherwise I'm loving the new one! I loved the old one, too, of course, for three years, but it'* now probably making some other Bonneville owners happy. I look at it like being an organ donor.
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Old 03-13-2007, 01:39 AM   #2
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Welcome "Organ Donor". I'm lucky to check my temp against a business temperature sign on the way to work. The business is always 2-3 degrees lower than the three cars I've driven to work, including my GXP. So, mine seems to be pretty accurate. I wish I could help, but I wanted to at least let you know someone was listening.
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Old 03-13-2007, 02:54 AM   #3
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Welcome to the Club, man. Ihavent heard of this problem before, I thought matbe you accidenly swiched Your reading to metric, but the temp difference would be even higher.
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Old 03-13-2007, 10:54 AM   #4
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Thanks to both ZeeVert and GXP Venom for a response so I at least know somebody was listening. Guess what? It'* working again! I'm hoping this will just become an unsolved mystery that I never have to track down because it never recurs, but we'll see. The temp reading in the SSEi was always accurate (within a couple of degrees or so. I'm not expecting the Weather Channel) but 15 degrees or so would be a problem, and was. If it comes back, I'll post about it again.
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Old 03-13-2007, 11:06 AM   #5
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No problem Dakata and welcome to "The other side of the Creek" in the Forum The GXP'* represent a very small portion of the Bonneville production so it reflects so in the club but there iis a small growing number of us and most check in at least daily. Glad your temps working again, we havent had anyone have a temp sensor screw up till yours and why nobody came immidiately forward, I imagine. But dont let that scare You. The N* section gets lonely, sooner or later someone will have an opinion.
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Old 04-18-2007, 01:43 AM   #6
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The sensor on these cars is located in front of the radiator on the center support. Typically, if anything, it'd read falsely higher due to the heat from the radiator.

Here'* some interesting reading on what this little module does. Hopefully it helps give insight on how it reads and changes the temp on your display. It'* pretty standard GM. The 2004 Bonneville service information only had R&R procedures, so I pulled this info from the Grand Prix service information. I bolded where I think you're having a problem. These little sensors are cheap and can be bought at NAPA.

Quote:
Ambient Outside Air Temperature Sensor Description
The outside air temperature sensor is located in the front grill area under the front bumper of the vehicle. The HAVC control head uses this sensor to receive information on ambient air temperature. With this information, the HVAC control head will give the driver the outside air temperature on the digital display. If the outside temperature increases, the displayed temperature will not change until:

The vehicle'* speed is above 32 km/h (20 mph) for approximately one and a half minutes.
The vehicles speed is above 72 km/h (45 mph) for approximately one minute.
These delays help prevent false readings. If the displayed temperature goes down, the outside temperature display is updated immediately. If the vehicle has been turned off for more than three hours, the current outside temperature will be shown when the vehicle is started. If it has been turned off for less than three hours, the temperature will be recalled from the previous vehicle operation.
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