U0069

Vehicle Communication Bus E (-) Open

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine Light Is On
Lack of communication with individual control units
Incorrect operation of various systems (for example, ABS, airbags)
Loss of signals on the dashboard
Unstable engine operation

Causes

CAN Low wire break
Corrosion or oxidation of contacts in connectors
Malfunction of one of the modules in the CAN network
Wiring harness damage
Problems with the CAN network power supply

How to Fix

Check the integrity of the CAN Low wires
Inspect connectors for corrosion
Check CAN network power supply
Disable the modules one by one to find the faulty one
Measure the CAN bus resistance

Related codes

U0068 U0070 U0071