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SMC panic · sensor array code
iPhone 14 / 14 Plus panic 0x400000 (4194304)
Wireless-charging coil / back-glass flexMulti-source
Models: iPhone 14 / iPhone 14 Plus · boards d27, d28
Log line: S.sensor array 0 - 7 is … with 4194304 (or 0x400000) in word 1.
Where to look: Wireless charging flex (back glass)
Bench checks
- Swap-test with a known-good OEM/premium flex; the flex must be plugged in while testing (an unplugged sensor flex also causes the 3-minute restart).
- Check the wireless-charging flex after any back-glass replacement.
Same number, different meaning on other iPhones
Bit layouts change between generations. Do not reuse these meanings on iPhone 14 / 14 Plus.
| Model family | Meaning there |
|---|---|
| iPhone 15 Pro / Pro Max | Wireless-charging flex (back glass) |
| iPhone 16 Pro / Pro Max | Wireless-charging IC (under the SIM tray) - single vendor list |
| iPhone 17 Pro / Pro Max | Taptic engine (single vendor list) |
Sources
- iFixit - iPhone SMC Panic Assert (accessed 2026-09-26)
- Repair Wiki - iPhone 14 randomly restarts (accessed 2026-09-26)
- iPad Rehab (Jessa Jones) - Troubleshooting iPhone reboot problems (accessed 2026-09-26)
Hinglish me
iPhone 14 / 14 Plus me 0x400000 (4194304) ka matlab: Wireless-charging coil / back-glass flex.
Kahan dekhein: Wireless charging flex (back glass)
Known-good OEM/premium flex laga ke swap-test karo; test karte waqt flex connected hona chahiye (sensor flex nikla hua ho to bhi 3 minute wala restart aata hai).
Back-glass badalne ke baad wireless-charging flex zaroor check karo.