RDCM [ Rear Differential Control Module ]

2014 LAND ROVER RANGE ROVER SPORT
109,401 MILES • V8 • 4WD • AUTOMATIC
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IAM_HASEEB0
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Hello this is Range Rover sport 2014 with Supercharged before the car is good no problem in car customer say's before i washed my car after the fault coming in my car dashboard when i connect the Autel and check the fault the fault is coming in RDCM Rear differential control module P0657-13 Actuator supply voltage A circut/open and also one more code are coming P080A/54 Clutch position is not learned so i'm checking the fuses wiring connectors everything is good but the problem is not going to solved please help me, Thanks
Feb 22, 2026 at 3:10 AM
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STRAILER
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Yep, I have seen the diff fluid wear out and cause issues so I would change that out first and check the electrical connector at the actuator, and then clear the codes, if the P0657-13 code comes back I would replace the actuator

P0657-13 - Actuator Supply Voltage A Circuit / Open

The first code is in result of this code

P080A-54 - Clutch Position Not Learned

You may need to drop the differential to change it out. Clear the codes once the repair is completed and let me know. Check out the images (below). Ken
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Feb 23, 2026 at 7:38 AM