Error code

Extech multimetre All models code U0401

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Meaning

ECM CAN messages time out or validity

Signed-in members see the LED pattern and how to read the code with the remote control on eligible records.

CAN circuit failure, ECM software failure

Solution steps are not shared for faults that may be dangerous.

No do-it-yourself solution is given for this fault. For your safety, call an authorised service.

Get help from a technician over a video call.