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ABS, traction and 4X4 lights are all on

Tiny
NASER NASER
  • MEMBER
  • 2003 BMW X5
  • V8
  • 4WD
  • AUTOMATIC
  • 166,000 MILES
Scanner shows 3 of the 4 rear correctly while driving while the court reads 0, cleaned it, nothing. Replaced it still nothing, keep getting these codes.
20 wheel speed sensor, front right transmits no signal.
5a brief power interruption.

battery had to be jumped, but still even so the fourth should at least show speed.
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Monday, September 16th, 2019 AT 11:52 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi,

If you are not getting a signal from that sensor then this is clearly the cause of the lights.

If the sensor is replaced, then you need to test the system by spinning the wheel with a meter on the sensor to see if the sensor is generating a signal. If not, then you have a wiring, sensor, or tone wheel issue. Here is a guide that walks you through this. If this all test okay and you are getting a signal, then the module may be your issue.

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

Give this a read and let me know what you think. Thanks
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Monday, September 16th, 2019 AT 5:48 PM

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