U0001
High Speed CAN Communication Bus
U0001 is an OBD-II diagnostic trouble code meaning: High Speed CAN Communication Bus. Common causes: broken can bus wires, short circuit in can circuit. Estimated repair cost: $6–56.
Symptoms
- Check Engine light comes on
- Incorrect operation of various vehicle systems
- Lack of communication with diagnostic equipment
- Dashboard malfunctions
- The car may go into emergency mode
Causes
- Broken CAN bus wires
- Short circuit in CAN circuit
- Damaged connectors or poor contact
- Fault in one of the modules connected to the bus
- Damage to terminal resistors
How to Fix
- Check the integrity of the CAN bus wires
- Check the resistance of the terminal resistors (should be about 60 Ohms)
- Inspect connectors and contacts for oxidation or damage
- Disable the modules one by one to find the faulty one.
- Check power and ground of modules
Related codes
Error U0001 by Vehicle Brand
FAQ
What does the U0001 code mean?
U0001 is an OBD-II diagnostic trouble code that indicates: High Speed CAN Communication Bus
What causes a U0001 error code?
The most common causes of U0001 include: Broken CAN bus wires; Short circuit in CAN circuit; Damaged connectors or poor contact; Fault in one of the modules connected to the bus.
How do I fix a U0001 diagnostic trouble code?
To fix U0001: Check the integrity of the CAN bus wires. Check the resistance of the terminal resistors (should be about 60 Ohms). Inspect connectors and contacts for oxidation or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0001?
Do not drive — repair immediately
How much does it cost to fix U0001?
The estimated repair cost for U0001 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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