U01B8
Lost Communication With Switch Input Module B
U01B8 is an OBD-II diagnostic trouble code meaning: Lost Communication With Switch Input Module B. Common causes: broken or damaged can bus wires, switch module b fault. Estimated repair cost: $33–167.
Symptoms
- Some switches in the cabin do not work
- Check Engine Light Is On
- Errors in other CAN bus-related systems
- Intermittent operation of related functions
Causes
- Broken or damaged CAN bus wires
- Switch module B fault
- Module power problems
- Corrosion of contacts or connectors
- ECU malfunction
How to Fix
- Check the integrity of the CAN bus wires
- Diagnose switch module B
- Check the power supply and ground of the module
- Inspect connectors for corrosion
- If necessary, replace the switch module
Related codes
Error U01B8 by Vehicle Brand
FAQ
What does the U01B8 code mean?
U01B8 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Switch Input Module B
What causes a U01B8 error code?
The most common causes of U01B8 include: Broken or damaged CAN bus wires; Switch module B fault; Module power problems; Corrosion of contacts or connectors.
How do I fix a U01B8 diagnostic trouble code?
To fix U01B8: Check the integrity of the CAN bus wires. Diagnose switch module B. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U01B8?
Yes, but get it checked soon
How much does it cost to fix U01B8?
The estimated repair cost for U01B8 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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