3G --> 4G TCU Upgrade '16 C-Max ENERGI

Yes. You’ll need an H series TCU for those. Anything later like the J will not work. The H ones seem to be harder to find and usually from the Escape. But it’s just as easy as the J TCU you just did.

One caveat if using a TCU pulled from an ICE only vehicle, it will need to be updated to the latest available calibration to enable the Go Times/Departure Times and Value Charge features. All the other functions will work though if it is not updated. In my personal experience with an OBDLink EX, the calibration updates take approximately 2h30m to complete. Make sure you have a batttery charger handy for that. I wouldn’t rely on the EVSE to keep the vehicle powered during this process.

Here’s some additional helpful resources:

Just as a clarification, I own a C-Max Energi myself and have done this upgrade (as well as a few other members here). So feel free to ask any questions about the process and I’ll try to answer them. :slightly_smiling_face:

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