DTC U0100 (Keyless Access Power Control Unit) (2025)
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2025 Honda Odyssey, 2024 Honda Odyssey, 2023 Honda Odyssey, 2022 Honda Odyssey, and 2021 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0100 : BCM lost communication with ECM/PCM
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: BODY ELECTRICAL TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) or BODY ELECTRICAL TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A - INITIAL COMMUNICATION AND DTC CHECKS or BODY ELECTRICAL TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE B - CONTROL UNIT NOT COMMUNICATING .
- Before you troubleshoot, review the general troubleshooting information. - Refer to: HOW TO TROUBLESHOOT THE BODY ELECTRICAL
- NETWORK COMMUNICATIONS SYSTEM DESCRIPTION (2021 2022 2023 2024 2025) .
- If the PCM does not start normally, DTC may be stored.
- Check the power circuit and ground circuit of the PCM.
| DTC Description | DTC |
|---|---|
| U0100 BCM lost communication with ECM/PCM |
DTC (Keyless Access Power Control Unit)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTC with the HDS.
-3. Turn the vehicle to the OFF (LOCK) mode.
-4. Turn the vehicle to the ON mode.
-5. Check for DTCs with the HDS.
DTC Description DTC U0100 BCM lost communication with ECM/PCM Is DTC U0100 indicated?
YES
Go to the Network Communications troubleshooting (F-CAN Lost Communication (CAN BUS with Connection to CAN Gateway)) - Refer to: Network Communications Symptom Troubleshooting Index(B-CAN Lost Communication) (2025).
NO
Intermittent failure, the system is OK at this time.