DTC P0721-62: Output Shaft Speed Sensor Circuit Range/Performance - Signal compare failure: Action

NOTE: If this DTC is flagged, this may indicate that the vehicle has been fitted with an incorrect front and/or rear differential. Refer to the REAR DRIVE AXLE/DIFFERENTIAL -- LR4/L319 and FRONT DRIVE AXLE/DIFFERENTIAL service information before continuing with the diagnostic steps outlined below.

Using the manufacturer approved diagnostic system, check the antilock brake system control module for related DTCs and refer to the relevant DTC index
Using the manufacturer approved diagnostic system, clear the DTCs and road test the vehicle. If the fault persists, install a new transmission control module