C0215 BMW Left Rear Wheel Speed Sensor Signal Malfunction
Possible causes
– Faulty Left Rear Speed Sensor
– Left Rear Speed Sensor harness is open or shorted
– Left Rear Speed Sensor circuit poor electrical connection
– Left Rear Speed Sensor rotor
– Sensor installation
– Brake actuator (skid control ECU)
– Left Rear Speed Sensor harness is open or shorted
– Left Rear Speed Sensor circuit poor electrical connection
– Left Rear Speed Sensor rotor
– Sensor installation
– Brake actuator (skid control ECU)
Symptoms
– ABS warning light ON
C0215 BMW OBD Code Description
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to control the ABS control system. The front and rear rotors have 48 serrations each.
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates AC voltage. Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the frequency is used by the ECU to detect the speed of each wheel.
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