Lost Communication With Body Control Module C
What does U0143 mean?
The U0143 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Body Control Module C. This is a low severity code.
Common Symptoms
- Minor body electrical features inoperative
- Specific comfort or convenience features not working
- Possible warning light on dashboard
Probable Causes (Ranked by Likelihood)
- Failed body control module C Very High
- CAN bus wiring fault to BCM C High
- BCM C connector corrosion Moderate
- BCM C power supply failure Low
Step-by-Step Diagnostic Procedure
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Check BCM C power and ground
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Inspect connector for corrosion
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Verify CAN bus wiring to BCM C
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Identify which features are controlled by BCM C
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Replace BCM C if communication lost
Frequently Asked Questions
Can I drive with code U0143?
Yes, you can drive. Lost communication codes indicate a module has stopped communicating on the vehicle network. The affected system may not function correctly.
What causes U0143?
The most common cause is a failed module or a wiring issue in the CAN bus network. Failed body control module C is the most likely cause. Power supply, ground, and connector issues should be checked before replacing any module.
Is U0143 expensive to fix?
Repair costs range from $150 - $700 (parts and labor). Wiring repairs are on the lower end, while module replacement is on the higher end. The module may also need to be programmed after replacement.