Code result
U0006
High Speed CAN Communication Bus Open
High severity
What it means
The CAN-Low wire of the high-speed bus is open. The differential signal can no longer be evaluated correctly, so all bus participants report communication loss simultaneously.
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
CAN-Low wire broken
highOne of the most commonly reported causes for this code — check this first.
Pin pushed back in connector
mediumA plausible cause — test and verify before replacing parts.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose U0006 freeNo credit card required