U0001High Speed CAN Communication Bus Malfunction
Serious problem in the vehicle high-speed CAN communication network.
This code also has a manufacturer-specific definition:
Can I keep driving? NO
STOP the vehicle in a safe place. Continuing to drive may cause serious engine damage or put your safety at risk.
Sistema Afectado
Red CAN · Comunicación entre módulos
Falla de comunicación en la red CAN: pérdida de datos entre las unidades de control (ECU).
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- Multiple simultaneous error lights
- Modules not responding
- Vehicle in limp mode
Possible Causes
The components or conditions that trigger this code
- 1CAN bus open or short-circuited
- 2Faulty ECU
- 3Electromagnetic interference
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Check the CAN bus wiring
- 2Check all ECUs with a scan tool
- 3Repair or replace the faulty ECU
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Communication modules
* Diagnosis only: $50–$150
Quick Info
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