"ALS" Light on all the time. Anyway of getting it to go away. Is it a sensor issue?

10

Asked by Dec 04, 2015 at 12:05 AM about the 2000 Chevrolet Cavalier

Question type: Maintenance & Repair

Anti Lock Brake light is on (on dashboard) all the time. Is this a Sensor repalacement issue? How can I check?

1 Answer

65,025

If the light cones on and stays on when you start the car it's most likely a wheel speed sensor. However, you'll still need a scan tool that can communicate with the ABS computer to know which one. If the light comes on when you start the car then goes off but comes on when the car first starts moving after the start up it's going to be the ABS pump and modulator assembly. The ABS computer runs a self diagnosis on the sensors immediately upon start up. Then when you start to drive the ABS computer cycles the ABS pump and modulator assembly to check it. HTH. -Jim

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