Question about Audi A6
The temperature is showing the wrong temp outside
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Posted on Jan 02, 2017
changing the engine sensor is easy when engine is cold and make sure you refill with antifreeze ,Buy sensor first so you know what to look for its not expensive from a motor factor .i honestly cant remember ever changing one on this model but it must be around the head area somewhere
Posted on Aug 16, 2009
if your outside temp is wrong on your 2002 Envoy here is how you fix it. part number 15047946 sensor. looks like the wrong part..it's not. take the brace part off of it by pressing the clips and slide out the part you need. Loosen the 4-5 bolts from the top of the grill..attached to brace right on top of the grill..just pull the grill out about 3 inches..put your hand thru..it's driver side to the middle. original is grey box with connector. pull it out, reattach connector to new part and push the new piece in the hole..get the piece from the dealer..25.00...put screws back in grill brace. reset the temp by pressing front defrost, rear defrost and mode all at once. took me 15 minutes..and I'm a 55 year old girl:) you can do it!
Posted on Jun 23, 2010
There are four sensors for ambient tempurature and they work in unison to provide information to the temp reading on the dash, the heater control head ( where to direct air, blending of warm/cold/outside/inside air flapper controls) depending on the ambient temp and the inside air temp sensor located just above the radio as well as the sun sensor on the top of the dash as well as the a/c compressor head.
When you start your car, the body control module takes the readings from all sensors, outside air temp located in front of the radiator, air temp sensor located in the airbox ( senses temp of air being drawn in from the outside into the air box), coolant temp, inside air temp sensor and the sun sensor on top of the dash (this is why it takes a few seconds for the climate control system to begine when you start the car). The intake air sensor is 1st priority, inside air second, coolant third, ambient 4th and sun 5th. For instance, if the sun sensor reads the sun is hot but the interior sensor reads cold, the inside akes priority. The goal is for the system to achieve a tempurature inside the car that matches the selected temp. It uses all of the sensors to set the system up to achieve that goal as quickly as possible.
Example; Its mid afternoon, sunny and 40 degrees outside adn your in stop and go traffic. The intake sensor reads 40 degrees, the outside sensor reads 60 degrees (heat from radiator...engine heat protrudes into cabin) and the sun sensor reads high (sun is strong). The system is set for 72. priority one sensor reads 40, inside sensor reads 65, ambient reads 60= system will blow hot air to the floor out put, dash outlets will lightly flow 65 degree air so the sun doesnt roast you yet your feet are cold(if it blew hot air from all outlets, your upper body would be hot but your legs/feet would be cold). as the interior sensor reaches desired temp, air will be distrubuted through thee dash, defrost and floor with the warmest air coming out the floor and defrost, coolest air out the dash vents. Its a complex system!
The two sensors that will screw the system up the most are the intake and interior sensors. the system will function reasonably well with just those two sensors though it wont blend air temps between outlets if the sun sensor isnt working. If the outside sensor fails, it simply uses the intake sensor, if the intake sensor fails it will rely on the front sensor. However, since the intake takes priority over the outside sensor, if the intake sensor sends incorrect resistance info rather than failing, it will take priority and cause the unit to malfunction such as in your case.
The intake air sensor can be changed from the outside with patience. If it where me, I would pay the two hrs labor and let the dealer do it right.
Kevins Small Engine service,
South Berwick ME. 03908
Posted on May 31, 2012
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