U0069
Vehicle Communication Bus E (-) Open
U0069 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus E (-) Open. Common causes: can low wire break, corrosion or oxidation of contacts in connectors. Estimated repair cost: $6–56.
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
Error U0069 by Vehicle Brand
FAQ
What does the U0069 code mean?
U0069 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus E (-) Open
What causes a U0069 error code?
The most common causes of U0069 include: CAN Low wire break; Corrosion or oxidation of contacts in connectors; Malfunction of one of the modules in the CAN network; Wiring harness damage.
How do I fix a U0069 diagnostic trouble code?
To fix U0069: Check the integrity of the CAN Low wires. Inspect connectors for corrosion. Check CAN network power supply. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0069?
Do not drive — repair immediately
How much does it cost to fix U0069?
The estimated repair cost for U0069 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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