U0140: Lost Communication With Body Control Module
What Does U0140 Mean?
U0140 is a diagnostic trouble code indicating: Lost Communication With Body Control Module. This code relates to the network communication system. It has been reported in NHTSA complaints across 10 different vehicle models.
Symptoms of U0140
- ⚠️ Check engine light illuminated
- ⚠️ Unusual vibrations
- ⚠️ Traction control system activated
- ⚠️ Steering issues
- ⚠️ Coolant leak
Common Causes
- 🔍 Wiring or connector problem
- 🔍 Sensor or control module malfunction
U0140 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"Component(s) Involved: Front and rear subframe/crossmember, driveline (CV axles, differential), stability and traction control system (including yaw sensor, steering angle sensor, and Accessory Gateway ECU). Available for Inspection: Yes. The vehicle is available for inspection, and I have detailed "
— Toyota Camry owner, 01/24/2024
"Driving on the highway I lost braking power the brake vacuum pump ceased up and broke the bolt in the cam shaft that had to be drilled out and replaced then that caused more damage to the cam and bottom end of the motor for the motor to throw the following codes: p0365 p0369 p0012 p0299 b1215 p023"
— Ford Escape owner, 07/02/2021
"I am reporting a safety-related defect involving the electric power steering system on my 2017 Ford Explorer. The vehicle displays a “Steering System Fault” warning, and when this occurs the power steering assist is reduced or disabled, creating a safety risk during low-speed driving, turning, and p"
— Ford Explorer owner, 12/11/2025
Source: NHTSA Complaints Database
Most Reported Vehicles for U0140
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | JEEP CHEROKEE | |
| 2 | FORD ESCAPE | |
| 3 | TOYOTA CAMRY | |
| 4 | FORD EXPLORER | |
| 5 | FORD FOCUS | |
| 6 | FORD FUSION | |
| 7 | CHEVROLET MALIBU | |
| 8 | CHEVROLET CRUZE | |
| 9 | CHEVROLET IMPALA | |
| 10 | JEEP WRANGLER |
U0140 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
What causes communication codes?
Can a bad battery cause network codes?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Inspect wiring harness and connectors for damage, corrosion, or loose connections
- 🔧 Check battery voltage and ground connections; inspect CAN bus wiring
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.