Communication with the tachograph (TCO)
â–¶ How to fix
Check connections and wiring for the yellow CAN bus. Check whether there are any fault codes for the tachograph.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Communication with the tachograph (TCO) has been terminated.
Possible cause
The tachograph is not working correctly, or there are open or short circuits on the yellow CAN bus.