Question about 1999 Audi A4

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Change outisde temp reading from C to F

How do i change the outside temp reading in an Audi A4 2.8 Quattro, from C to F degrees.

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Think you might need vag-com cable but im not sure

Posted on Jul 16, 2008

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What does it mean when my oil temp gage reads high but coolant temp reads in middle on Audi a4 Quattro 2.8 v6


It means the oil is hotter than the coolant or you have a bad gauge or sender. Oil temp and coolant temp are very loosely related to each other. Coolant temp should remain within 10 degrees of thermostat temperature once warmed up. I think that has a 196 degree thermostat so the coolant should be no lower than 196 and no higher than 206, tho up to 220 is relatively normal if it's hot out and/or you're running it hard. Oil temp is loosely regulated if at all, as long as it's not above 250 sustained or 300 in short bursts you're fine. Much above that and there's a problem, but it would most likely be a bad reading. It's hard to over heat the oil unless you're on a race track.

Oct 14, 2015 | Audi Cars & Trucks

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Troubleshooting a/c


Checking the pressure with the system not working won't tell you anything. A system with just a half pound of freon will read outside air temp on both gauges with the compressor off.
I guess my first few questions would be - - is the compressor running at idle, what are the gauge readings at idle, and is the cooling fan running at idle ?
The two gauge readings at idle with the compressor running should be 30-45 low and 200-250 high.

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2 Answers

What type of oil grade should i use in my 2001 audi 2.8 a4 quattro..this car came with no owners manual,and its time to change..thanks


Engine oil capacity with oil filter replacement = 6.0 litres.

Oil grade for 2001 Audi A4 Quattro 2.8
1. SAE 5W-30 / 5W-40, VW 502.00 - all temperatures.
2. SAE 10W-30 / 10W-40, VW 502.00 - all temperatures.
3. SAE 5W-50, VW 501.01 - all temperatures.
4. SAE 10W-50 / 10W-60, VW 501.01 - all temperatures.
5. SAE 5W-30 / 5W-40, VW 501.01 - bellow +15 Celsius degrees.
6. SAE 10W-30 / 10W-40, VW 501.01 - bellow +15 Celsius degrees.
7. SAE 15W-40 / 15W-50, VW 501.01 - above -15 Celsius degrees.
8. SAE 20W-40 / 20W-50, VW 501.01 - above -15 Celsius degrees.

LONGLIFE engine oil:
1. SAE 5W-30, VW 504.00 - all temperatures.
2. SAE 0W-30, VW 503.00 - all temperatures.


Please do rate my response. Thanks!

Jan 26, 2011 | 2001 Audi A4

1 Answer

Where is the external temp sensor on my audi a6 quattro


There is an outside temp sensor that is mounted in the front of the car behind the radiator grille. You should see a 1 pin sensor somewhere on the top of the radiator support.

Jan 13, 2011 | 2002 Audi A6

1 Answer

Audi A4 1.8T Quattro 09/2003 Temp guage rises as


Could be thermostat this regulates the water flow around the engine to keep it cool sounds like it is sticking open when water gets hot!!

Jun 07, 2009 | 2005 Audi A3

2 Answers

Misreading outside temperature sensor on 2001 Audi A4


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.

Kevin,
Kevins Small Engine service,
South Berwick ME. 03908

May 01, 2009 | 2001 Audi A4

1 Answer

1989 Audi 90 Quattro problem


Try changing the fuel filter, first. If that does not work try replacing the pump. Also make sure you run 91 or higher octane.

Apr 20, 2009 | 1989 Audi 90

1 Answer

2002 A6 Outside Temperature Setting / Homelink Setup


When you change the heat system to read deg C, the outside air temp will also read deg C. To change between F & C press and hold the recirc button on the heat control and then press the + on the drivers side.

Jan 31, 2009 | 2002 Audi A6

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