Are all ABS sensors the same?

Asked By: Arash Krzossa | Last Updated: 18th March, 2020
Category: automotive auto safety technologies
4.7/5 (2,312 Views . 42 Votes)
The ABS sensor is also called the wheel speed sensor or ABS brake sensor. Since all the wheels do not turn at the same speed, the ABS sensors report the speeds of all the four wheels to the ECM, based on which the ECM determines if the wheels are locking up.

Click to see full answer


Thereof, are ABS sensors on all wheels?

A wheel speed sensor, also called an "ABS sensor," is part of the Anti-lock Brake System (ABS). On cars that come with rotors in each tire, each tire will also have a speed sensor. On cars that have rear drums (instead of rotors), the tires will have one sensor in the rear and two sensors in the front.

One may also ask, how do you know which ABS sensor is bad? So, now you know how to test your ABS sensors to find out which one is bad. Using a voltmeter, you can connect it to the ABS sensor and turn the wheel to get a reading. If you don't or it is wrong, you can clean the ABS reluctor. If the reading is still incorrect, you know which sensor to replace.

Also question is, are speed sensor and ABS sensor the same?

Yes, the ABS Sensor and the Wheel Speed Sensor are both the same part. Yes, the ABS Sensor and the Wheel Speed Sensor are both the same part.

What causes ABS sensor to fail?

A wheel speed sensor is the most common failure in the ABS system. The reason your engine management and traction control light are also on is because those systems "borrow" wheel speed information from the ABS system. The reason the fail so often is because they live in a hostile environment.

30 Related Question Answers Found

Can you clean an ABS sensor?

Cleaning the ABS Sensor
If, however, the sensor is really grungy, use a mild soapy solution and rinse well. The ABS sensors are precision instruments in a crude environment. They're tough enough to hang off the brakes of a fast-moving vehicle, but one good knock and they could be damaged beyond repair.

Can you drive car without ABS module?

Yes, you can drive without ABS but be careful. The ABS control module in these cars also control front/rear brake bias.

Do I need to bleed ABS module?

Normal bleeding procedures can be used to bleed the individual brake lines provided no air has entered the ABS modulator. But if air has entered the modulator, the system will have to be bled using a pressure bleeder and scan tool: Connect the pressure bleeder to the master cylinder reservoir.

Can you drive with a bad ABS sensor?

That is why in general, it is unsafe to drive a vehicle with a broken wheel speed sensor. If the wheel speed sensor becomes damaged or wears out, initially you probably won't notice much difference in the way your car performs if your ABS light comes on unless you are driving on slippery pavement.

Can worn brake pads cause ABS light to come on?

This could mean your brakes need to be adjusted or that your brake pads are worn and need replacement. Your dashboard's Anti-lock Braking System (ABS) light turns on. This indicates that your brake fluid is low. You may have a leak in your brake line.

Can ABS sensor cause transmission problems?

Yes, ABS does affect the transmission. Namely, the vehicle speed sensor is part of the ABS system. This is where your truck reads road speed. The transmission tuning is also based on road speed, and controls when the truck upshifts, downshifts, and when to lock the torque converter.

How do you fix a speed sensor?

How to Repair a Vehicle Speed Sensor
  1. Park the vehicle on a level surface. Engage the emergency brake and turn the engine off.
  2. Place a vehicle jack on the left side and right side of the automobile.
  3. Look straight up on the passenger side of the vehicle.
  4. Unplug the electrical wire.
  5. Align the replacement speed sensor into the transmission.

How much does it cost to replace an ABS speed sensor?

The average cost for a wheel speed sensor replacement is between $200 and $298. Labor costs are estimated between $63 and $80 while parts are priced between $137 and $218.

How do you clean a wheel speed sensor?


How to Clean the Speed Sensor on a Vehicle
  1. Prepare the area by gathering all materials and placing them within reach.
  2. Lift up the front of the car, and place it on the jack stands.
  3. Locate the sensor, and decide whether it is an open or disguised sensor.
  4. Take the wrench, and unfasten the sensor.
  5. Spray the rag with degreaser.

How much does it cost to change ABS sensor?

ABS wheel sensors cost anywhere from $100 to $200 each, while ABS control modules run from $200 up to $600 apiece. In addition, expect to pay between $80 and $150 per hour for labor and anticipate at least an hour to an hour and a half of work.

What causes a wheel speed sensor to go bad?

Although sensors can go bad, the most common problem is faulty wiring or corroded electrical connections. Use an ohmmeter to test the sensor's winding and compare it to the service specs. Typically, the readings are between 450 and 2,200 ohms. Replace any sensor that shows an open or internal short.

How do I fix my abs sensor?

With the sensor clean, you can begin replacing the ABS sensor to complete the ABS brake repair. Start by screwing in and tightening the bolts on the brake line. Ensure that the sensor is seated properly, then hand tighten the bolts on the knuckle of the suspension. Tighten down fully with the ratchet.

How do you replace an ABS speed sensor?

How to Replace an ABS Wheel Speed Sensor
  1. Open the hood and loosen the retaining nut on the cable clamp connected to the negative battery terminal.
  2. Turn the wheel lug nuts counterclockwise with a tire wrench 1/4 turn.
  3. Raise the vehicle onto jack stands.
  4. Finish removing the wheel lug nuts and pull the wheel off the wheel hub assembly.

How do I reset my ABS system?


How to Reset an Anti-Lock Brake Light
  1. Disconnect the positive cable from the car battery, and then hold down on the brake pedal to drain the car's electrical system. This will reset the car's central computer.
  2. Change the ABS sensor if the light comes back on.

How long do ABS sensors last?

You can usually expect to get 30,000 to 50,000 miles out of your ABS speed sensor – more if you don't drive often, or if you live in an area where your car is seldom exposed to dirt, road salt, or other compounds that can cause damage to electronics.

Can low tire pressure cause ABS light to come on?

This suggests that you may have low tire pressure in one of your tires. Depending on the signal transmitted from the wheel speed sensors to the ABS system as a result of the change in tire pressure, this may have also caused the ABS light to come on.