Face ID panic on iPhone: causes and faulty parts

Face ID is a kernel panic that makes an iPhone restart on its own, usually leaving a Panic-Full log under Analytics Data. When this error line appears, the first part to check is Face ID assembly. Severity is rated medium, and confidence in this diagnosis is likely. Below you will find what the error means and its most common causes; to pin down what is wrong with your phone, scan the log with the Panic Scan app.

Basic information

Code: Face ID
Category: Face ID
Severity: Medium
Confidence: Likely
Part to check: Face ID assembly

What it means

The Face ID assembly (dot projector, infrared camera) hit an error.

Common causes

Faulty / water-damaged Face ID assembly
Face ID flex
Front sensor assembly

For reference only, compiled from repair documentation and community data. The same error can come from more than one part; always confirm on the actual device.