iPhone panic codes — sourced meanings

7 codes · d63, d64, d16, d17

6 codes · d27, d28

11 codes · d73, d74

6 codes · d37, d38

7 codes · d83, d84

8 codes · d47, d48

6 codes · d93, d94

4 codes · v53, v54

2 codes · d23

Barometer / air-pressure sensor (PRS0)

Bottom microphone (Mic1)

Rear microphone (Mic2)

Battery sensor TG0B (battery temperature)

Battery sensor TG0V (battery voltage)

Battery sensor TG1B

Eiger (charge-port sensor)

TP1A thermistor (rear camera, single field source)

TP0Z thermal sensor - no public part mapping

TP2C thermal sensor - no public part mapping

Microphone temperature sensor 1 (i2c3 bus)

Microphone temperature sensor 0 - no public mapping

Microphone temperature sensor 2 = mic2, next to the flash (VCC, often iPhone 11)

Microphone mic3 - position next to the front camera (VCC); no panic-to-part case found

Microphone mic4 - position bottom right (VCC); no panic-to-part case found

Battery sensor TB0T (SMC panic, battery temperature)

Battery sensor TB0V (SMC panic, battery voltage)

The Always-On Processor's sensor controller timed out waiting for the proximity sensor; VCC Board Repairs list

The Always-On Processor's sensor controller timed out on a device; the device name follows SCMto in the panic

AOP sensor controller timed out on "pearl"; the Pikabu list reads it as the proximity sensor power supply.

Always-On Processor non-maskable interrupt from the power path.

AOP cannot talk to the Bosch sensor.

Barometer / pressure sensor not answering.

The Always-On Processor stopped receiving the heartbeat ("pulse") of its "pearl" task. Pearl is Apple's intern

The Always-On Processor stopped receiving the heartbeat of the task named after "!pulse" (iOS 18+/26 wording o

AOP lost the heartbeat of the power task; the Pikabu list reads it as the power button or the upper flex.

AOP lost the heartbeat of the main task. A solved iPhone X case with main(4) was the upper sensor flex (ALS ar

A coprocessor task stopped responding; Rewa lists the ringtone (speaker) and vibrator as possible causes.

The Pikabu list reads it as the board halves (sandwich) or the gyroscope.

The Pikabu list reads Eiger.cpp as the barometer; Repair Wiki lists the "eiger" missing sensor as the iPhone 1

The Pikabu list reads it as the upper flex.

The Pikabu list reads it as the Home button (Home-button models).

Rewa lists poor CPU soldering or the NAND.

Non-maskable interrupt in the Always-On Processor. The word after the pc= value is the AOP task that was runni

NAND storage or its communication lines malfunctioning.

Secure Enclave ROM or its link to the CPU damaged.

A device on that I2C bus holds the line low. The log names the bus and often the device.

PCIe link to the modem timed out.

CPU over-temperature or the PMU-CPU line.

Often software; persistent cases point at RAM/NAND.

Charge-port controller or the charge port itself.

Power-management processor exception. No public repair mapping found (searched 2026-09-26).

The Wi-Fi driver (AppleCentauriAlpha) crashed repeatedly. Reported by many iPhone 17 / 17 Pro Max owners on iO

VCC: apcie(wlan) is the Wi-Fi link, apcie(bt) the Bluetooth link.

VCC and Rewa list these strings as NAND or NAND rails.

VCC: the CPU or any part holding certificates.

VCC: the CPU or the coils on its buck lines. Rewa: check the charging IC first, then the CPU supply. An iPhone

VCC lists the CPU.

The Pikabu list reads it as the modem.

Ambiguous (VCC). Rewa: check the audio codec rails first, then the CPU supply.

Ambiguous (VCC); Rewa lists the CPU power supply.

AppleOLYHAL is the Wi-Fi (WLAN) hardware layer on the PCIe link between the SoC and the Wi-Fi / Bluetooth modu

Rewa lists Wi-Fi / Bluetooth.

Rewa: communication between the CPU and the Wi-Fi module.

Rewa: poor CPU soldering (forcibly halt CPU); NAND or SoC (parity counter overflow).

DART is Apple's IOMMU: every memory access by a coprocessor goes through its DART. "dart-aop ... DART exceptio

The Pikabu list reads it as the lower flex or the USB controller (Hydra / Kraken).

DART is Apple's IOMMU in front of each coprocessor. "dart-<name> ... DART exception" means that coprocessor ma

The Pikabu list reads it as the display or the IC on it.

VCC: "initproc exited" = crystal oscillator. Pikabu: "initproc failed to start" = broken link between PMU and

VCC: memory error; restoring may end with error 14.

VCC and Pikabu read lm3539 as the backlight driver; a solved iPhone 8 boot loop logging it on i2c3 was fixed b

DCP is the display coprocessor (A14 and later). The panic came from the display pipeline. One confirmed iPhone

A SOCD file (panic-base+socd) is a report from the Apple-silicon SoC that the phone hit an unrecoverable fault