Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC U0140-87: Lost Communication with Body Control Module Missing Message [12/2024 - ]: Procedure
- CLEAR DTC
Result:
NEXT
See step 2
- CHECK DTC OUTPUT
Pre-procedure1
- Turn the ignition switch off and wait for 30 seconds or more.
- Start the engine.
- Perform a road test.
- Read the DTCs.
Powertrain > Stop and Start > Trouble Codes
Result
Result Proceed to U0100-87, U0101-87, U0114-87, U0129-87, U0140-87, U0151-87, U0155-87, U0164-87, U115C-87 or U1170-87 is output A U0100-87, U0101-87, U0114-87, U0129-87, U0140-87, U0151-87, U0155-87, U0164-87, U115C-87 or U1170-87 is not output B
Post-procedure1
- None.
Result:
A
GO TO CAN COMMUNICATION SYSTEM
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2024 - ]
Result:
B
USE SIMULATION METHOD TO CHECK
Refer to HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.