Question about 1999 Audi A8

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ABS light on at start and brake light flashing

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  • Audi Master
  • 14,036 Answers

Replace the brake switch.i has seen in gm cars if brake switch is open not working.it will cause anti lock brakes stop working.see if anti lock brake module detect fault in brake switch circuit .anti lock brakes stop working.your brake light and abs light will come on.if this dont help.take it to dealership.

Posted on Jul 12, 2009

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6ya6ya
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Posted on Jan 02, 2017

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chuck943
  • 783 Answers

SOURCE: ford windstar. only when i start to drive the car

Sounds as if you have a false activation of the ABS system.
If the light does not come on until you are driving then the ABS module is probably seeing a difference in wheel speed from side to side. It could be caused by different size tires,are all your tires the same size and brand? It could be caused by one tire having low tire pressure. It could also be one of the sensor rings esp. on the front has maybe cracked and slipped out of place causing the air gap between the sensor and the ring to be larger than it is suppose to be.The gap between sensor and ring is usually 0.045 of an inch sometimes the ring which is pressed onto the outer CV joint will crack and the ring will slid up the joint slightly away from the sensor.This will decrease the amplitude of the sensor signal and ABS interputs this as a wheel trying to slip or lock up and activates the ABS.When ABS activates it will make a loud pulsing type sound and it will almost feel like it is not going to stop.

Posted on Feb 20, 2009

  • 1 Answer

SOURCE: abs light stays on ol the time olso hand brake

My 2000 passat does the same thing... I was told i need to replace my abs pump... but Ive been driving it this way for eight months with out any known problems... i was told it just wount pulsate the brakes for you... you need to do it old school and pump the brakes in an emergancy

Posted on Mar 14, 2010

duane_wong
  • 6826 Answers

SOURCE: Flashing heater coil from the start and brake

Well, the brake lining sensor is saying that your linings are low.
And the abs light tells one that the wheel speed sensor isn't detecting the right speed in a wheel. Need an ABS OBDII compliant Brake scanner to read codes in 1996 and later vehicles.

I do not know what the flashing heater coil is, though.

I need a year, make, and model to search.

Posted on Jul 14, 2010

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hi Robert

you can check the ABS fault code as following:

switch ignition on and wait for the abs light to start to flash.
it will flash in long and short flashes, long flash stands for ten, short flash stands for one, there is a short pause in between, and long pause after each code, take a note of the code and Google it
good luck
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CODE 12 CODE 21

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Flashing heater coil from the start and brake lining with abs(?)lights constantly on after braking.


Well, the brake lining sensor is saying that your linings are low.
And the abs light tells one that the wheel speed sensor isn't detecting the right speed in a wheel. Need an ABS OBDII compliant Brake scanner to read codes in 1996 and later vehicles.

I do not know what the flashing heater coil is, though.

I need a year, make, and model to search.

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I have a 2004 chevy aveo ls the abs light is on and sometimes it acts like it dont have brake any answers out there thanks


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Will not come out of Park,and the ABS light is flashing.


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