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.
2020 Land Rover Defender 90 First EditionFACTORY OEM SERVICE PROCEDURE
DTC U2016-47: Control Module Main Software - Watchdog/safety microcontroller failure: Action
- Using Jaguar Land Rover approved diagnostic equipment, check the DTC error count. Refer to the TCCM DTC Error Count Pinpoint Test instructions in the relevant Diagnosis and Testing service information. For additional information, Refer to: TRANSFER CASE
Factory Service Tools
Use the Manual With the Right Hardware
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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.