eiger — Missing sensor
Watchdog panic: thermalmonitord no longer receives readings from the “Eiger” sensor, which Repair Wiki links to the charging port on the iPhone 12 series; with no news from it for ~3 minutes, iOS restarts the iPhone, in a loop as long as the sensor stays missing.
On iPhone 12 Pro Max, iPhone 12 Pro, iPhone 12 mini, iPhone 12
Charging port flex
Low 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 12 Pro Max ›iPhone 12 Pro ›iPhone 12 mini ›iPhone 12 ›