iPhone 14 Plus — sensor array 0x20000: Logic board: sandwich interposer

Low confidenceVerified sourceSMC: silent sensor

On the iPhone 14 Plus, 0x20000 means: Logic board: sandwich interposer (layer separation).

What does this code mean?

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; here, the silent element is on the logic board itself, most likely via the interposer that connects the two layers. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent.

Which part to test first?

Inspect the edges of the logic board for a gap between the layers; board repair (controlled heating, reballing).

The same code on other models

Field cases

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Sources