ABS Sensor Fault Symptoms & Problems

The ABS sensor is also known as the Wheel Speed Sensor. The job of the sensor is to provide a digital signal to the car's ECU that reports the speed of each wheel.

This function is vital for ABS to operate as without speed readings from the wheels the ECU cannot determine whether a wheel is locking up under braking. When the ECU detects a wheel is turning at a speed slower than is possible relative to the other wheels it will engage the ABS system to manage braking on the wheel. Once the wheel then returns to a normal speed it will re apply the brake (via the abs pump). This process repeats up to 20 times per second and is responsible for the grinding sensation you sometimes feel when you apply the brakes.

If the sensors malfunction this vital safety system cannot work correctly. It's not always clear if the sensors are failing as other issues can make them appear to be the culprit. Any problems or warnings from the ABS should be investigated by a qualified mechanic.
3 Symptoms of ABS Sensor Problems
We have 88 owner submitted problems mentioning the ABS Sensor

Showing the latest 10, see more problems here

9
responses
Warning Lights

suddenly, this morning, several warning lights came on (ASR, Parking Brake, Tyre Deflation and Eco) and cruise control ...

2013 Citroen C4 Picasso
Posted: Mar 21, 2021
1
response
Spedometer not working

I had my passenger front brake caliper replaced, suddenly after my spedometer stopped working and ABS sensor came on?

2005 Vauxhall Astra 1.8 club
Posted: Dec 11, 2020
4
responses
Brakes kicking in at low speed

when pulling off from the car standing for some time around 10mph in first it feels as if the brakes are engaging and ma...

2012 Vauxhall Meriva 1.4
Posted: Aug 16, 2020
3
responses
Abs light on

i had new rear shocks replaced and immediately car was started the abs light stayed on...two different dianostics could ...

2008 Chevrolet Matiz 1.0 petrol
Posted: Feb 24, 2020
1
response
Electrics and power steering

After 3 days in the garage, the problems are still present - the hand-brake light, on the dash, flashes, the ABS warning...

2010 Seat Ibiza 1200cc
Posted: Feb 20, 2020
1
response
Abs and tracs light

i have intermittent issue with tracs and abs lights cming on and the car seems to go into limp mode then ityll come back...

2008 Chevrolet Captiva 2.0 lt diesel
Posted: Aug 8, 2019
1
response
Intermitent loss of power, no speedo & no parking brake All at Same time!

I have an intermittent issue. I had warning lights coming up which the garage fixed stating it was the ABS sensor. Then ...

2010 Vauxhall Insignia 2.0 deisel
Posted: Jun 2, 2019
1
response
Electrical issues

Hi there, was hoping for one or two pointers with my Peugeot, It has a number of electrical issues all of which have a...

2003 Peugeot 307 1.6 SE
Posted: Apr 15, 2019
4
responses
Speedo below zero

Hi All I have a small but potentially troublesome problem When stationary tbe needle on my Mini is below zero actual...

2002 Mini Cooper
Posted: Oct 6, 2018
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