Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2021 Land Rover Defender 90FACTORY OEM SERVICE PROCEDURE
DTC U201A-51: Control Module Main Calibration Data - Not programed: Action
NOTE:
To validate the repair run the engine for 30 seconds, then use the Jaguar Land Rover approved diagnostic equipment to check this DTC is no longer set within the body control module
- Using the Jaguar Land Rover approved diagnostic equipment, re-configure the body control module with the latest level software
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.