U1016high severityNetwork
CAN Bus Off - Transmit Error Counter Exceeded
on 2000 BMW 540iT E39 4.4L V8 · RWD
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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Other Network codes on this vehicle
CC-ID-181
System Check Failed
CC-ID-207
Central Electronics Failure, Stop Vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High