Question about 1999 Audi A6

4 Answers

Audi a6 on board computer reading faults

Hi there just wondered if any one no whats wrong with my a6 when starting car abs light comes on and then onboad computer starts flashing no oil and rev counter stops working but when its below frezzeing all works fine till gets to serten temp

Posted by on

  • 2 more comments 
  • abujon2000 Jan 22, 2009

    i have the same problem with my 1999 A6 Audi, Engine and the Abs light comes on with dropping of the revs thus making the ac unoprative.

  • Joe Smiith
    Joe Smiith Feb 07, 2009

    same problem i tried freezer spray on abs modulator bosch part number0273004285 the problem goes away to return when unit warm again also heavy braking brings it on immediatly plus just fitted second hand modulator same problem and supplier says ha checked it before shipping and i believe him so problem is definately from modulator when warm but must be other fault but shows when modulator is warm ddriving me nuts will check power supply to abs in case its only marginal otherwise stumped on this one

  • Anonymous Feb 13, 2009

    transmission problem



  • Anonymous Mar 13, 2014

    audi a6 rev counter not working

×

4 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers

You have a thermal fault i the abs modulator <ecu bolted onto pump> the rev counter fails because this signal fails to get from 13.8 volts to zero it only manages to get to about 3 volts this is very common on bosch 5 series mine had pt code bosch 0273004285 and is notorious but easil removed and sent to bba here in uk or others in usa you will have to remove wheel then washer bottle then modulator but car stiill drives when removed the esp needs signal from abs and fails at same time also loss of tacho signal puts il light on i tried to find second hand one biut they didnt work have sent mine for repair<you need a microscope to do it> will post when it comes back ps easily confirmed by spraying abs pump.modulator with freex=zer spray did it to mine and fault dissappears untill warm again nb even when cold i bet if you brake hard a couple of times it will fail please let me know if your pt number is same as mine and if this heelps it drove me nuts

Posted on Feb 26, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have an Audi A3 2006. It has starting problems when starting from a warm engine. Always starts when cold. It is fully serviced and had all the recommended repairs/ maintaince done when required. It is baffling even the mechanics who have had it in their service depot for 3 weeks now. Any suggestions out there?

Posted on Apr 14, 2011

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I found out on the net that it was an failure in the ABS-ECU (seemed to be common for this type) and had it repaired by ABB in Germany, now it works perfect again.

Posted on Apr 03, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 99 Answers

I would check charging voltage when this happens. The voltage at the battery should be around 14 volts engine running. If there is a drop in voltage, this can affect the vehicle control units, bringing on warning lights. Check it at tickover and at a higher rpm, if there is a significant difference say 3 volts, then replace the alternator.

TL

Posted on Jan 25, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Traction control light on car jerks when you put it in gear 2001 Audi a6 Quattro what do I need to do to fix it


You will need the systems control module scanned for fault codes, when the light is on a code is in memory.

May 10, 2016 | 2001 Audi A6

1 Answer

Audi a6 glow plug light and abs light plus triangle sign stay on any ideas


the easiest way to find out EXACTLY whats wrong is to ask an AUDI DEALER for a diagnostic check for your car,they have the fault codes and the book that tells them what parts need replacing,if any.the glow plugs are in no way connected to the warning triangle/abs,so you have at least two problems......the cost of diagnostics is about $50,cheap if you buy/fit any parts required.
UNLESS YOU HAVE A LIST OF ALL THE FAULT CODES AND WHAT THEY MEAN.......you could fit bits that are not needed.

Oct 16, 2010 | 2003 Audi A6

1 Answer

My Audi A6 has a solid yellow ABS light and a flashing Red Brake light. It won't pass inspection now because of this. Whats wrong?


you will have to have someone scan the abs computer to pull the error codes.. this is the only way to know what ares is at fault

Apr 23, 2010 | 1999 Audi A6

2 Answers

ABS light is on and a red warning light for brakes. What can be wrong


I had this problem. I had to change the ABS unit. It seems to be a common fault. There are Many companies offering repairs to these units. You will also need to get the fault log cleared once you have fitted a replacement. It could also be one of the wheel sensors. The best bet is to get an auto electrician to read the fault codes.

Nov 10, 2009 | 1998 Audi A6

1 Answer

AUDI A6 WONT START ON KEY BUT WILL ON TOW - FAULT SHOWING AT ABS - TRIED NEW ABS UNIT - BRAIN IS NOT COMUNICATING WITH ABS UNIT. TRIED NEW WIRING LOOM - NO REVS WHEN FAULT SHOWING


i have audi a6 2005 ,i turn the key to start noting happen, the lights on the dash does not come on, i checked the battery is good, when the key is on on position the stearing wheel is not unlocked

Oct 21, 2009 | Audi A6 Cars & Trucks

2 Answers

A6 quattro gearbox fault


Get somebody to read your faults from the obd plug (underneath the ashtray between the seats) and come back.

Jun 12, 2008 | 1997 Audi A6

Not finding what you are looking for?
1999 Audi A6 Logo

2,079 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audi Experts

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

yadayada
yadayada

Level 3 Expert

60769 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

13152 Answers

Are you an Audi Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...