Lost Communication With Body Control Module C
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.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $150 - $700 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
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
-
Check BCM C power and ground
-
Inspect connector for corrosion
-
Verify CAN bus wiring to BCM C
-
Identify which features are controlled by BCM C
-
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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Share carcodefinder.com with a friend who needs to decode their check engine light.