iPhone XS Max — tp3r: Logic board
Low confidenceVerified sourceMissing sensor
On the iPhone XS Max, tp3r means: Logic board (temperature probe on the board) — micro-soldering repair.
What does this code mean?
Watchdog panic: thermalmonitord no longer receives the reading from TP3R, an undocumented temperature probe, most likely on the logic board (same “TPxx” naming family as TP1A); with no response for ~3 minutes, iOS restarts the iPhone. Rare case: no confirmed repair found.
Which part to test first?
First test with a known-good battery, charging flex and power flex to rule out the parts; then board-level diagnosis by micro-soldering (thermistor line, short to ground, and according to a relayed report, the Tigris charging circuit).
The same code on other models
- iPhone SE (1st generation)Logic board
- iPhone 12 Pro MaxLogic board
- iPhone 12 ProLogic board
- iPhone 12 miniLogic board
- iPhone 12Logic board
Field cases
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