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 U0100: Lost Communication with ECM / PCM; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter [08/2015 - 08/2019]: Procedure
- CHECK FOR DTC
- Check for DTCs and note any codes that are output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
- Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
- Recheck for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019]
).RESULT
Result Proceed to DTC is not output A DTC is output B
Result:
A
USE SIMULATION METHOD TO CHECK
(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )
Result:
B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] )
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.