U0141Network Communication

Lost Communication With Body Control Module B

U0141 means a module has lost communication with body control module B over the CAN bus. This secondary BCM manages additional body electronics. It usually points to a wiring, power, ground, or connector fault.

🚗 Not recommended. Losing a secondary body control module can cause widespread electrical faults.
HIGH
severity
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🎯 Top Causes, Ranked by Likelihood

#1Wiring, connector, or CAN bus fault$50-$500
45%
Damaged or corroded wiring to body control module B.
#2Power or ground fault$50-$400
30%
Blown fuse or poor ground at the module.
#3Failed body control module B$300-$1200
15%
The secondary BCM itself has failed.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$50-$400
Shop Cost
$150-$1000

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose U0141

1Check fuses, power, and grounds for body control module B
2Inspect CAN wiring and connectors at the module
3Scan all modules for lost-communication patterns
4Back-probe the CAN bus for correct signal

❓ Frequently Asked Questions

Can I drive with U0141?
Not recommended. A secondary BCM controls various systems, so its loss can cause electrical faults. Diagnose it first.
What causes U0141?
Wiring, connector, or power/ground faults at body control module B, most often.
What is body control module B?
It is a secondary body control module that handles additional accessories and electronics on some vehicles.

🔗 Related Codes

U0140U0100U0155U0146
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