CAN Bus Off - Transmit Error Counter Exceeded
2012-2015 BMW 320i 2.0L I4 Turbo N20
Description
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.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U1016 on Other Vehicles
Common Questions
What does code U1016 mean on a 2012-2015 BMW 320i?
U1016 stands for "CAN Bus Off - Transmit Error Counter Exceeded". A module CAN transceiver has entered bus-off state due to excessive transmit errors. The module has stopped communicating to protect the bus.
What are the symptoms of U1016 on a BMW 320i?
Common symptoms of U1016 include: Specific module completely offline, System controlled by that module inoperative, Other modules reporting lost communication with affected module.
What causes U1016 on a 2012-2015 BMW 320i?
Common causes of U1016 include: Module CAN transceiver failure, CAN bus wiring short causing transmit errors, Module hardware fault, CAN bus impedance mismatch.