U0048
Vehicle Communication Bus C (+) Open
U0048 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus C (+) Open. Common causes: mechanical damage to can bus wires, oxidation of contacts in connectors. Estimated repair cost: $6–56.
Symptoms
- Check Engine Light Is On
- Malfunctions of various vehicle systems
- Unstable operation of the dashboard
- Lost connection with some modules
- Problems with diagnostics via OBD-II
Causes
- Mechanical damage to CAN bus wires
- Oxidation of contacts in connectors
- Broken wiring due to corrosion
- Malfunction of one of the network modules
- CAN circuit fuse problems
How to Fix
- Visual inspection of the CAN bus wiring for damage
- Checking circuit continuity with a multimeter
- Cleaning contacts in connectors
- Finding and replacing damaged wiring sections
- Checking the functionality of all modules in the CAN network
Related codes
Error U0048 by Vehicle Brand
FAQ
What does the U0048 code mean?
U0048 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus C (+) Open
What causes a U0048 error code?
The most common causes of U0048 include: Mechanical damage to CAN bus wires; Oxidation of contacts in connectors; Broken wiring due to corrosion; Malfunction of one of the network modules.
How do I fix a U0048 diagnostic trouble code?
To fix U0048: Visual inspection of the CAN bus wiring for damage. Checking circuit continuity with a multimeter. Cleaning contacts in connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0048?
Yes, but get it checked soon
How much does it cost to fix U0048?
The estimated repair cost for U0048 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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