U0142Network Communication

Lost Communication With Body Control Module C

U0142 means a module has lost communication with body control module C over the CAN bus. This additional BCM manages more body electronics. It usually points to a wiring, power, ground, or connector fault.

🚗 Not recommended. Losing a body control module can cause widespread electrical faults.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Wiring, connector, or CAN bus fault$50-$500

45%

Damaged or corroded wiring to body control module C.

#2Power or ground fault$50-$400

30%

Blown fuse or poor ground at the module.

#3Failed body control module C$300-$1200

15%

The module itself has failed.

🩺 Common Symptoms

Multiple electrical faults
Accessories not working
Warning lights
Other U-codes stored
Erratic behavior

💰 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 U0142

1Check fuses, power, and grounds for body control module C

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 U0142?

Not recommended. This module controls various systems, so its loss can cause electrical faults. Diagnose it first.

What causes U0142?

Wiring, connector, or power/ground faults at body control module C, most often.

How many body control modules can a car have?

Some vehicles use several, labeled A, B, C, and so on, each handling a group of body electronics.

🔗 Related Codes

U0140U0141U0100U0155