0x80000 — SMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; here, the proximity sensor on the front flex has stopped responding. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent. Reproduced on iPhone 14 Pro by disconnecting the proximity sensor (DFRWS 2025).

On iPhone 14 Pro Max, iPhone 14 Pro

Front sensors flex (proximity)

High confidenceVerified sourceSMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; here, the proximity sensor on the front flex has stopped responding. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent. Reproduced on iPhone 14 Pro by disconnecting the proximity sensor (DFRWS 2025).

First check

Inspect the front sensors flex (proximity / ambient light) and its connector, then connect a known-good flex to see if the restarts stop; diode mode on the connector if in doubt.

iPhone 14 Pro Max ›iPhone 14 Pro ›

On iPhone 15 Plus, iPhone 15

Charging port flex (USB-C) and/or barometric pressure sensor

High confidenceVerified sourceSMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; here, the sensor in the charging port assembly (including the barometric pressure sensor) has stopped responding. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent.

First check

Check the seating and condition of the charging port flex (tears, corrosion, FPC connector pins), then test with a known-good genuine flex; if the panic persists, measure the connector pins on the logic board in diode mode.

iPhone 15 Plus ›iPhone 15 ›

On iPhone 16 Plus, iPhone 16

Charging port flex (USB-C) / barometric pressure sensor

Medium confidenceVerified sourceSMC: silent sensor

SMC “BSC failure” panic: the system management controller (built into the SoC) periodically waits for a response from each mandatory sensor; here, the sensor in the charging port assembly (the lower microphone module / barometric pressure sensor must be connected) has stopped responding. With no response, it forces a restart, which repeats roughly every 3 minutes (≈180 s) as long as the sensor stays silent. Code shown in decimal in the log: 524288.

First check

Check the seating and condition of the charging port flex (tears, corrosion, FPC connector pins), then test with a known-good genuine flex; if the panic persists, measure the connector pins on the logic board in diode mode.

iPhone 16 Plus ›iPhone 16 ›

Sources