U0251
Lost Communication With Running Board Control Module B
U0251 is an OBD-II diagnostic trouble code meaning: Lost Communication With Running Board Control Module B. Common causes: broken or damaged wiring, step control module b malfunction. Estimated repair cost: $56–167.
Symptoms
- The step does not work or does not work correctly
- Check Engine light comes on
- Errors in other vehicle systems
- Problems with automatic door opening
Causes
- Broken or damaged wiring
- Step control module B malfunction
- Module power problems
- Contact corrosion
- Problems with the CAN bus
How to Fix
- Check the integrity of the wiring to the module
- Check the power supply and ground of the module
- Inspect contacts for corrosion
- Check module functionality
- Scan the CAN bus for errors
Related codes
Error U0251 by Vehicle Brand
FAQ
What does the U0251 code mean?
U0251 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Running Board Control Module B
What causes a U0251 error code?
The most common causes of U0251 include: Broken or damaged wiring; Step control module B malfunction; Module power problems; Contact corrosion.
How do I fix a U0251 diagnostic trouble code?
To fix U0251: Check the integrity of the wiring to the module. Check the power supply and ground of the module. Inspect contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0251?
Yes, but get it checked soon
How much does it cost to fix U0251?
The estimated repair cost for U0251 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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