Volvo ABS/Wheel speed sensor replacement
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Volvo ABS/Wheel speed sensor replacement
Does My Volvo ABS/Wheel Speed Sensor Need Replacing?
The anti-lock braking system (ABS) on your Volvo is a secondary defence that prevents you from locking up your brakes. It tells your car’s computer when to activate the ABS system, preventing your brakes from locking up so you can steer safely.
ABS sensors, also known as wheel speed sensors, are critical in determining when the ABS system should activate.
A wheel speed sensor is an electrical component to measure the rotation of a wheel. There are usually wheel speed sensors at every wheel on Volvo's installed with anti-lock brakes, either integrated into the wheel hub assembly or bolted to the steering knuckle.
The sensor itself is a magnetic pickup that determines the position of a rotating trigger wheel. The ABS sensors monitor each wheel simultaneously, then their reading is received by a central ABS module.
Each sensor’s reading is compared to the vehicle speed and to each other in real-time to determine if ABS brakes should activate. If one sensor is not reading consistent information or is not transmitting a reading at all, it will need to be replaced.
In normal, everyday driving conditions Volvo ABS sensors might never fail. However, corrosion or damage to the wiring or the sensor itself can happen, causing faulty readings or no reading at all, and it will need to be replaced.
You should expect at least 100,000km before an ABS or wheel speed sensor replacement is required. Volvo's operated in dusty regions or in coastal areas with salty air will usually experience problems more often. When a wheel speed sensor is failing you may notice:
- The ABS warning light is illuminated
- ABS brakes activate erroneously
- The brakes lock up on hard application
- The Traction Control warning may illuminate as well
Damage or corrosion to ABS system wiring can cause symptoms that mimic a failed wheel speed sensor. Professional diagnosis is critical to avoid unnecessary repairs.
Driving your car with a faulty ABS sensor can put you and your occupants in danger of an accident as you may not be able to safely stop your car.
When your Volvo needs the ABS sensors replaced AutoGuru will come in very handy!
Volvo Models
- Volvo 142
- Volvo 144
- Volvo 145
- Volvo 164
- Volvo 240
- Volvo 242
- Volvo 244
- Volvo 245
- Volvo 262
- Volvo 264
- Volvo 265
- Volvo 360
- Volvo 440
- Volvo 460
- Volvo 480
- Volvo 740
- Volvo 760
- Volvo 850
- Volvo 940
- Volvo 960
- Volvo C30
- Volvo C70
- Volvo Cross Country
- Volvo S40
- Volvo S60
- Volvo S70
- Volvo S80
- Volvo S90
- Volvo V40
- Volvo V50
- Volvo V60
- Volvo V70
- Volvo V90
- Volvo V90 Cross Country
- Volvo XC40
- Volvo XC60
- Volvo XC70
- Volvo XC90