08 savana coo55 ?

[jt9940]

When driving engine will rev up and speedometer goes up and downthen the brake light and abs light turn on. Local auto store scanned for code and it was coo55. What would cause this?

 

[Parts007]

DTC C0055 01
Rear Wheel Speed Sensor Circuit Short to Battery

DTC C0055 04
Rear Wheel Speed Sensor Circuit Open

DTC C0055 0F
Rear Wheel Speed Sensor Circuit Erratic

DTC C0055 26
Rear Wheel Speed Sensor Circuit Frequency Too Low

 

[jt9940]

Where do i find the sensor looked around online it says rear diff. But i cant locate anything on the rear diff. Thanks