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Audi a4 fan comes on as soon as turn ignition. Had bother sensors replaced & relay & wiring checked - ok

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Is this a problem ? Do you mean the cooling fan in the engine ? As long as it does not stop running altogether it should not be a problem.if it's not the cooling fan, then I don't have an answer.

Posted on Nov 08, 2008

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Audi fault code 17072


Possible Symptoms
  • Engine Coolant Fan running at full Speed while Ignition is OFF and Engine is COLD (could lead to discharged Battery)
Possible Causes
  • Fuse(s) faulty
  • Power Supply Relay for Engine Control Module (J271) faulty
    • Terminal 87 faulty/hanging
  • Wiring between Engine Control Module (J220) and Power Supply Relay for Engine Control Module (J271) faulty
Possible Solutions
  • Check/Replace Power Supply Relay for Engine Control Module (J271)
  • Check Wiring between Engine Control Module (J220) and Power Supply Relay for Engine Control Module (J271)
  • Check/Replace Engine Control Module (J220)
(See http://store.ross-tech.com/shop They sell a very useful tool for diagnosing Audis)

Jan 25, 2014 | 2003 Audi A4

1 Answer

Cooling fans on aztek no coming on, ran hot wire to fans and works. checked fuses, jumped wires at temp. sensor and fans ran after shutting ignition off for aprox. 30 seconds, replaced temp. sensor and...


there are 4 steps to check and you've mentioned all but one the relay which cuts the fan on'off. At an elec shop you check in this order power to fuse block, fuse & output side, temp sensor, relay, and fan motors. Get a new relay

Apr 28, 2011 | Pontiac Aztek Cars & Trucks

1 Answer

Audi 80, 1992, fan not coming on.


Have you tried a fan relay?
I'm thinking there is a coolant sensor AND a fan sensor on that model.

Feb 23, 2010 | 1992 Audi 80

3 Answers

03 Audi A4- Coolant fan runs until the battery dies


What does the fan do when you restsrt/charge the battery? Start up again? Replace the sending unit, or unplug the sending unit first. If fan keeps running, the relay is faulty.
if it stops, the sending unit is at faulat. good luck

May 18, 2009 | 2003 Audi A4 Cabriolet

1 Answer

Audi A4 starting problem


your have a bad starter relay look at owner manual for location and replace

Apr 21, 2009 | 2000 Audi A4

1 Answer

Audi a4 2002 radiator fan keeps randomly starting


it could be a faulty fan switch, or faulty engine coolant temp sensor or a faulty fan relay

Feb 16, 2009 | 2004 Audi A4

1 Answer

2003 Audi A4 Cabriolet ...cooling fans come on at start up


Yes this car should have a temperature sending unit that tells the fans to kick on. If it has two fans one of them is for you Air-condiontion, and it will turn on whenever the ac is being ran. One other possibility is if you bought the audi used the owner before you may have hard wired the fan to run whenever the car ignition is turned on. The only reason someone would do that is if they were to lazy to fix it properly.

Jan 30, 2009 | 2003 Audi A4 Cabriolet

1 Answer

Electric fan


Which fan are you referring to, the electric fans for the cooling system, or the air blower fan inside the car as part of the climate control?

Nov 08, 2008 | 2004 Audi A4

3 Answers

2004 Audi A4 3L won't start


P0130 is 02 sensor bank 1 and P0150 is 02 sensor bank 2.

Aug 19, 2008 | 2004 Audi A4

2 Answers

A4 Starts ok then engine fades out? 1996 model


Try replacing the engine temp sensor. Temp sensor is telling ECU the engine is hot when its is actually cold. After the 6th attempt there is enough fuel in the cylinders to create a ritch mixture, then it goes.

TL

Jul 16, 2008 | 1999 Audi A4

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