U01BE on 2024-2025 Chevrolet Corvette (E-Ray, E-Ray 1LZ, E-Ray 2LZ, E-Ray 3LZ) — Lost Communication with Drive Motor Disconnect Clutch Actuator
1 vehicles · 1 makes · $150-$900 repair
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Chevrolet Corvette · 2024–2025
GM released Bulletin #24-NA-273, 'Malfunction Indicator Lamp (MIL) Illuminated - DTC U01BE Set,' specifically for the 2024-2025 Corvette E-Ray. U01BE is a serial-data network communication code, and on the E-Ray the hybrid control network carries modules that no other Corvette has (battery energy control module, drive motor control module, front electric drive unit). The bulletin's fitment is limited to the E-Ray, so a shop diagnosing this code on an E-Ray should not fall back on generic C8 network diagnostics.
Common Symptoms
- Check Engine light (MIL) illuminated
- Network communication DTC U01BE stored
- Intermittent hybrid system or eAWD warnings
How to Fix
Have the dealer pull a full session log across all modules, not just the ECM, and apply Bulletin #24-NA-273 for the 2024-2025 E-Ray. Do not let a shop replace modules on a communication code before the bulletin's diagnostic sequence has been run - GM's published fix for these E-Ray-specific U-codes is typically a defined harness/connector or software remedy rather than parts replacement.
Sources for this issue (1)
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U01BE code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U01BE mean?
U01BE stands for "Lost Communication with Drive Motor Disconnect Clutch Actuator." A network communication code set when the controlling module stops receiving valid serial data messages from the M162 drive motor disconnect clutch actuator — the actuator mounted on the side of the front electric drive unit that engages and disengages the drive motor's differential to provide eAWD. GM's diagnosis for the 2024-2025 Corvette E-Ray is an internal microchip malfunction inside the actuator itself, and the published repair is to replace the M162 actuator (P/N 24052771) rather than to chase wiring or reprogram.
What are the most common causes of U01BE?
The most common causes of U01BE are: Internal microchip failure inside the M162 drive motor disconnect clutch actuator (GM's stated cause), Open, shorted or high-resistance serial data circuit to the actuator, Corroded or unseated actuator connector, Loss of ignition voltage or ground to the actuator. The specific cause varies by vehicle.
How much does it cost to fix U01BE?
Repair costs for U01BE range from $150 to $900, depending on the vehicle and root cause.
Which vehicles are affected by U01BE?
Au7o has documented U01BE across 1 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.