Consolidated sensor reference

Missing sensor signatures: logical channels require model-specific mapping

A missing-sensor token records that iOS did not receive an expected response. It can narrow the affected subsystem, but it does not identify the physical component without the exact model and bench testing.

Start with the complete context

mic1

mic1 identifies a logical microphone-related sensor channel. Its physical route can change by model. Inspect the mapped connector and assembly, then test a correct-revision known-good part before board work. A torn flex, damaged connector, missing rail or open board line remain alternatives.

mic2

mic2 is also a logical channel, not a universal instruction to replace the charging flex. Confirm its model-specific path, inspect prior housing or port work, and use reversible substitution and continuity checks to separate the peripheral from its connector or board-side route.

prs0

prs0 is a pressure-related token. Some model mappings may route diagnosis toward a dock assembly, but that relationship cannot be transferred to every family. Check part compatibility, connector condition and the mapped supply or communication path.

tg0b and tg0v

tg0b and tg0v are thermal-domain channels. When they appear together or with other missing sensors, investigate shared rails, buses and connectors before replacing multiple assemblies. Their physical location depends on the exact model.

Confirmation boundary

Use inspection, reseating, correct known-good parts and justified measurements first. The token names the missing logical input; the physical cause can be a peripheral, connector, trace, filter, shared supply or communication fault.