CAN Bus Off - Transmit Error Counter Exceeded

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

1. Identify the module in bus-off state
2. Check CAN bus wiring at that module
3. Test CAN transceiver with scope
4. Check for bus impedance issues
5. 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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