Code result
U0072
Vehicle Communication Bus A (-) Bus Off
High severity
What it means
The CAN controller for bus A has gone bus-off on the minus side. Common after a CAN-L short or a faulty transceiver pulling the bus low.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Persistent short on CAN-L wire
highOne of the most commonly reported causes for this code — check this first.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
CAN terminating resistor (120 Ω) drifted out of spec
lowLess common, but worth ruling out after the more likely causes.
Related help
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