iPhone restarting with Kernel Panic SMC failure

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Level 1

4 points

iPhone restarting with Kernel Panic SMC failure

Hi, my phone started restarting. Unfortunately, it's not regular, not always every 3 minutes. Sometimes it would reboot after a while. I'm attaching the log with the Kernal Panic SMC Failure HEX 0X200000 40\nS.sensor array 0 - 5 is 0, 2097152

Can anyone help with this? Have the joints between the layers on the sandwich broken?

{"bug_type":"210","timestamp":"2026-05-06 14:10:27.00 +0200","os_version":"iPhone OS 26.3.1 (23D8133)","roots_installed":0,"incident_id":"401F8BAB-ECD8-4156-8501-30E6A13D42C8"}
{
  "crashReporterKey" : "8cde078292617f57ee52211eb52c4e3de7434761",
  "panicProcessingFlags" : "0x0",
  "product" : "iPhone15,4",
  "kernel" : "Darwin Kernel Version 25.3.0: Wed Feb  4 23:04:59 PST 2026; root:xnu-12377.82.2~13\/RELEASE_ARM64_T8120",
  "socRevision" : "11",
  "panicString" : "panic(cpu 1 caller 0xfffffff0427cc014): SMC PANIC - ASSERT: target\/d37\/target.cpp:316: 0, SMC BSC failure, TAOJ ----\nspreadsheet ver(*10) 40\nS.sensor array 0 - 5 is 0, 2097152, 0, 0, 0\nF.sensor array 0 - 1 is 0\n\n - Misc(2) OUTBOX1 not ready\nASSERT: target\/d37\/target.cpp:316: 0, SMC BSC failure, TAOJ ----\nspreadsheet ver(*10) 40\nS.sensor array 0 - 5 is 0, 2097152, 0, 0, 0\nF.sensor array 0 - 1 is 0\n\n\nRTKit: root@Jan 17 2026@11:12:46~.release - Client: AppleSMCFirmware_H15-6164.92.2.d37.REL\n!UUID: c337b685-93e0-3796-a207-1e39988e07fb\nASLR slide: 0x0000000000000000\nTime: 0x000000020435f5ae\n\nFaulting task   2 Call Stack: 0x0000000000051e4c 0x0000000000051804 0x0000000000051620 0x000000000005008c 0x000000000003dd68 0x00000000000454ec 0x000000000004da24\n\nChinook ASC Async error info: \nl2c_err_sts 0x5000fbfc00000000, l2c_err_adr 000000000000000000, l2c_err_inf 000000000000000000\nlsu_err_sts 000000000000000000, fed_err_sts 000000000000000000, mmu_err_sts 000000000000000000\ndpc_err_sts 000000000000000000\n\nMailbox (0): (0)\n  Inbox  AKF_KIC_INBOX_CTRL = 0x00020001, AKF_KIC_MAILBOX_SET = 0x11111101\n  Outbox AKF_AP_OUTBOX_CTRL = 0x00020001, AKF_AP_MAILBOX_SET  = 0x00000000\n\n    dir   endpoint      timestamp           msg\n    ====  ============  ==================  ==================\n

iPhone 15

Posted on May 6, 2026 7:07 AM

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Answer 1

Top-ranking reply

Lawrence Finch

Community+ 2026

Level 10

235,384 points

May 6, 2026 7:17 AM in response to darasS96

Repeated panics are almost always hardware problems.

To eliminate software, back up your iPhone, then restore to factory settings and test without restoring the backup.

How to back up your iPhone, iPad, and iPod touch - Apple Support
Restore your iPhone, iPad, or iPod to factory settings - Apple Support - follow the instructions to restore using your computer, do not using Settings/General/Reset

Test with the iPhone set up as new; if the problem still exists you need to contact Apple about a hardware repair. If the problem is gone you can try restoring your backup; if the problem returns your iOS is corrupt.

Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

Post back for next steps

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Answer 2

TheLittles

Level 10

206,553 points

May 6, 2026 8:42 AM in response to TheLittles

Edit:

See my User Tip And Other Possibilities Here: iPhone stuck in a boot loop - Apple Community

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Answer 3

TheLittles

Level 10

206,553 points

May 6, 2026 8:16 AM in response to darasS96

"iPhone restarting with Kernel Panic SMC failure: Hi, my phone started restarting. Unfortunately, it's not regular, not always every 3 minutes. Sometimes it would reboot after a while. I'm attaching the log with the Kernal Panic SMC Failure HEX 0X200000 40\nS.sensor array 0 - 5 is 0, 2097152 Can anyone help with this? Have the joints between the layers on the sandwich broken?"

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Boot Loop, Perhaps:

Being if turns on, and you can get in, and then this occurs intermittently, I wouldn't 100% suspect it to be a Boot Loop. Boot Loops typically occur when you go about installing an update, yet it stalls while in the process. But, given the chance, see about using my User Tip: iPhone stuck in a boot loop - User Tip

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