DTC C0039-38: Right Rear Tone Wheel - Signal frequency incorrect: Action

NOTE: After clearing the DTCs, the warning indicator(s) may not extinguish until the vehicle speed has exceeded 10mph (15kph)

Check the integrity of the rear right wheel speed sensor reluctor ring
Check the rear right wheel bearing
Check that the wheels and tires comply with the manufacturer's specification for the vehicle. Check the rear right wheel and tire for condition and balance.
Check and tighten the wheel nuts