U0006

High Speed CAN Communication Bus (-) Open

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine light comes on
Unstable engine operation
Gear shifting problems
Security systems failure
Errors in other vehicle systems

Causes

Physical damage to CAN bus wires
Corrosion of contacts in connectors
Problems with the ECU
Malfunction of CAN bus terminators
Break in the wiring harness

How to Fix

Check the integrity of the CAN bus wires
Inspect connectors for corrosion
Check the resistance of the terminators
Scan all ECUs for errors
If necessary, replace damaged wires or connectors

Related codes

U0001 U0002 U0005