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Fans PPF03/04 After replacing battery & keyboard cables

I just replaced my battery, USB ports and touchbar on my MacBook Pro. During the process I caught the keyboard connector and ripped it in half. I purchased a new cable from Amazon (https://www.amazon.com/gp/product/B07Q55...) and upon rebuilding the laptop everything works and boots to MacOS! The only issue is that the fans never spin up past an idle state and running diagnostics reveals a PPF03/04 reference code. Since both fans are spinning I can assume they have power, and on looking at the layout this is the only cable that runs between the keyboard area and the logic board. My initial thought is that the cable, being that its a knock off, is the problem, Thoughts?

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Apple made a major change in this series! Unlike the 2015 models which had the fans plug directly to the logic board, here Apple routed the fans via the upper case via the keyboard logic to then share the connection via the keyboard cable to the logic board!

As you switched out the keyboard cable I can only surmise the connector got damaged in the process or you had liquid damage given what you also replaced, but didn’t find the liquid damage on the uppercase or logic board.

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No liquid damage. I just got tired of the USBs falling out all the time, and 1/2 the touchbar not displaying. The keyboard works completely fine, no missed keystrokes, or phantom typing which lead me to the cable. If its not the cable I wonder which connector is more likely damaged, the upper case or the logic board.

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@nargesem - You'll need inspecting them with a good magnifier!

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Used a large magnifier and didn't see anything obvious after pulling everything apart except that what looks to be a grounding pad on the cable lifted from the keyboard. The big difference is now the diags say PPF04 error code and the left fan is spinning at MAX rpms all the time, but is reporting its state in tools like Mac Fan controls, but I'm unable to change it I assume because the right fan is still not reporting.

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You are seeing the lack of a connection to the Tach within the fan unit. SMC will push the fan to the max to make sure you don't cook your system.

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Eric Narges さん、ありがとうございました！
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