Possible causes
– Faulty Front or Rear Speed Sensor
– Front or Rear Speed Sensor harness is open or shorted
– Front or Rear Speed Sensor circuit poor electrical connection
– Faulty EBCM
– Front or Rear Speed Sensor harness is open or shorted
– Front or Rear Speed Sensor circuit poor electrical connection
– Faulty EBCM
Symptoms
– ABS Warning Light ON
C0238 CHEVROLET OBD Code Description
As the wheel spins, the wheel speed sensor produces an Alternating Current (AC) signal. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.
CHEVROLET Related C0238 code
2002 CHEVROLET TRAILBLAZER Service Brakes, Hydraulic:antilock:abs Warning Light
2002 CHEVROLET ENVOY Electrical System
2002 CHEVROLET TRAILBLAZER Electrical System
2002 CHEVROLET TRAILBLAZER EXT Electrical System