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Where to find the coolant temperature sensor on an audi tt

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The Engine Coolant Temperature (ECT) sensor on an Audi TT 1.8 Turbo:

where to find the coolant - tdisline_0.png

Posted on Nov 08, 2010

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Posted on Aug 24, 2014


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Posted on Jan 02, 2017

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SOURCE: 1995 Audie A90 Coolant Temperature Sensor replacement

It's located under the hood, driver side, upper engine area, mounted on rear of engine block behind cyl. head.

Posted on Dec 09, 2008

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Shuts off when warm wont stat until cool

audi tt sensors - forum about car parts and car advices
audi tt sensors 2004 audi tt coupe windows roll down hi all only new to forum 2001 ...2002 audi tt purchase advice newbie looking to get a tt. ... Used on cold starts towarm engine and cat faster. .... replaced and sending my car into limp mode. my ac just shut off one day and will not turn back on. the esp in the car is stuck off.

Sep 22, 2015 | 2002 Audi TT

1 Answer

How do I check if an Audi tt 1.8 coolant sensor is faulty?

Hi have a look on utube there is a good vidio that will make things easy to do yourself,hope this helps all the best.

Apr 21, 2017 | Audi TT Cars & Trucks

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Where is the temperature sensor located on a Audi TT 3,2 2004

hi i need wiring for audi tt 2005 oil presser sensor ,plz help me

Mar 14, 2012 | Audi TT Cars & Trucks

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I was told that the actuator motor was faulty and causing my audi TT to overheat. what is this actuator motor and what does it do for my car???

I presume it is the A/C Fan controller they are referring too.

This is an electronic relay controller that runs the coolant fans at different speeds and is also responsible for denying a/c operation when the Engine ECU detects an emission fault.

If the 'Check Engine' lamp is illuminated or the 'Throttle Body Adaption' has not run, a/c will not come on....but fans for cooling the engine should run when needed .

One way to check is to turn on the ignition to RUN but without engine running, activate the a/c and see if the cooling fans are running. If they are running, the Controller is generally not the problem.

If they are not running, the above applies to a certain extent in the course of diagnosis.. These controllers fail often and yours may have done so.

To further check, use a test lamp or DVOM to check for Battery voltage at the fat RED wire going to the Fan Controller.

The controller have two relays inside with a logic board, two plugs from the main loom, to the fan and a/c system...... plugs are socket keyed so only fit on one position in the controller..

Radiator Fan is activated by the engine ECU sending a signal to Fan Controller when the Coolant Temperature Sensor reports coolant exceeding normal temperature .

These Controllers live under the front chassis member below the battery and are held in place with two bolts, accessible after removing the battery and tray......IIRC.

Audi TT : Electronic Fan Controller part # 1J0 906 381 B. Your Audi parts deptment will tell you if this part have been updated with a C, D, or F designation. You can also find them at

Jan 19, 2011 | 2003 Audi TT

1 Answer

What should I do if the engine coolant light comes on? I have an Audi TT 02

take the plastic bottle off where you fill it with coolant and shake it till the ball drops and you can hear it flopping around ,its stuck

Dec 31, 2010 | 2002 Audi TT

2 Answers

I have failed emissions testing and have scanned my Audi TT to determine the problem codes ate P0116, P0118 and P0456. What are teh codes related to?

P0116 - Engine coolant temperature circuit range/Performance problem

P0118 - Engine coolant temperature circuit/High input

P0456 - EVAP leak monitor/Small leak detected

The following web site list all codes

Nov 30, 2009 | 2000 Audi TT

1 Answer

I have a 2000 Audi TT front wheel drive. Within the last two months the engine has developed a lot of spatial vibration under load. I can feel it in the steering wheel, pedal and the whole front end. I...

check for deformed tyres ?? this is the most obvious cause,i may be old dinasaur who gets lost with sensors and electronic stuff but after 40 yrs somethings never change

Sep 15, 2009 | 2000 Audi TT

2 Answers

Cooling fans not kicking in at high temperature.

problam could be with your coling temperatuer sensor .make sure fuse for you raditor fan is good.and you have coolant in you raditor.

May 20, 2009 | 2003 Audi TT

1 Answer

2003 Audi TT Quatro Coupe. The radiator cooling fan does not work. Vehicle over heats because the fan does not work. Replaced the radiator cooling fan motor and the temperature sensor. The problems is...

The main reason for the over heating of the audi tt is to do with the water pump. The propeller within the first type of water pumps is made of plastic. This was to prevent corrosion, however was never designed to last longer than 5 years. What you need to do is purchase the new style water pump. These new style water pumps have been designed with a metallic propellor which should resolve the overheating. Let us know how you get on.

Apr 21, 2009 | 2003 Audi TT

1 Answer

1995 Audie A90 Coolant Temperature Sensor replacement

It's located under the hood, driver side, upper engine area, mounted on rear of engine block behind cyl. head.

Dec 09, 2008 | 1995 Audi 90

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