prs0 — Missing sensor

Watchdog panic: thermalmonitord no longer receives readings from the PRS0 sensor (barometer), which is mounted on the charging port flex; with no news from it for ~3 minutes, iOS restarts the iPhone, in a loop as long as the sensor stays missing.

On iPhone SE (2nd generation), iPhone 12 Pro Max, iPhone 12 Pro, iPhone 12 mini, iPhone 12, iPhone 11 Pro Max, iPhone 11 Pro, iPhone 11, iPhone XS Max, iPhone XS, iPhone XR

Charging port flex (barometric pressure sensor / barometer)

High confidenceVerified sourceMissing sensor

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 SE (2nd generation) ›iPhone 12 Pro Max ›iPhone 12 Pro ›iPhone 12 mini ›iPhone 12 ›iPhone 11 Pro Max ›iPhone 11 Pro ›iPhone 11 ›iPhone XS Max ›iPhone XS ›iPhone XR ›

Sources