U1016high severityNetwork
CAN Bus Off - Transmit Error Counter Exceeded
on 2001 Audi A6 3.0L V6 · AWD
What this code means
A module CAN transceiver has entered bus-off state due to excessive transmit errors. The module has stopped communicating to protect the bus.
Symptoms
- Specific module completely offline
- System controlled by that module inoperative
- Other modules reporting lost communication with affected module
Common causes
- Module CAN transceiver failure
- CAN bus wiring short causing transmit errors
- Module hardware fault
- CAN bus impedance mismatch
Diagnostic steps
- Identify the module in bus-off state
- Check CAN bus wiring at that module
- Test CAN transceiver with scope
- Check for bus impedance issues
- Replace module and retest
Repair notes
Module CAN transceiver likely damaged. Replace the affected module after verifying CAN bus wiring is good.
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U0001
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