iPhone 13 'Prx' Sensor Panic Loop:The 3-Minute Restart Fix
Essential diagnosis guide for iPhone 13 devices restarting every 180 seconds due to 'Missing sensor(s): Prx' panic log errors.
QUICK ANSWER
WATCHDOG TIMEOUT: PRX
Proximity Sensor Flex Replacement
Hardware FixDIY Friendly
Confidence: 95% match for iPhone 13 devices restarting exactly every 180 seconds without impact damage. Use our diagnosis tool
Why This Diagnosis?
MATCHED EVIDENCE FROM SYMPTOM CHECK
Device restarts every 3 minutes exactlyScreen does not turn off during callsAuto-brightness stopped workingPanic Log contains 'missing sensor(s): Prx'
📷 Image Placeholder:
[IMAGE: iPhone 13 Panic Log Screen with 'Prx' Highlighted]
ANALYZING PANIC LOG SIGNATURE...
panic_string": "Panic(CPU 0 Caller): ... No board-id ... missing sensor(s): Prx ..."Found Match: Top Proximity Sensor Flex Assembly Failure
📷 Image Placeholder:
[IMAGE: Internal Anatomy showing Proximity Sensor location in iPhone 13]
What Usually Fixes It
RECOMMENDED KIT🇺🇸 US Stock
iPhone 13 Sensor Flex Cable
Professional Tool Set Included
2x Waterproof Adhesives
Magnetic Screw Pad to prevent screw missing
Step-by-Step Repair Guide
Want a More Precise Diagnosis?
Connect your device to our interactive tool. We'll analyze specific sensors and logic to pinpoint the exact failure point.
START FULL DIAGNOSISOther Possible Causes
WHILE LESS LIKELY, THESE ISSUES COULD ALSO CAUSE SIMILAR SYMPTOMS
Charging Port Flex Failure (Mic1)MEDIUM PROBABILITY
Logic Board Component ShortLOW PROBABILITY
Frequently Asked Questions
Q: Why does my iPhone 13 restart every 3 minutes precisely?
The iOS Watchdog system constantly checks thermal and proximity sensors. If the system fails to receive a signal from the 'Prx' (Proximity) sensor for 180 seconds, it triggers a security reboot to prevent potential hardware damage.
Q: Will I lose Face ID after replacing this sensor?
No. Unlike previous models (iPhone 11/12), replacing the proximity flex on the iPhone 13 does not disable Face ID. However, please note that Auto-Brightness and True Tone will be disabled.
Q: Can I fix this with a software update or factory reset?
No. The 'Missing sensor: Prx' error indicates a physical hardware disconnection or a short circuit within the flex cable itself. A software restore will not resolve this hardware-level communication failure.
Q: Is this repair difficult for a beginner?
It is rated as 'Intermediate'. The most critical part is keeping track of the different screw lengths. This is why our kit includes a Magnetic Screw Pad to prevent losing or mixing up screws, which can cause 'Long Screw Damage'.