iPhone Error Code
iPhone Error 4013 and Error 4041 Data Recovery
On FaceID iPhones, Error 4013 is most commonly caused by liquid damage to the earpiece speaker flex or ambient light sensor. The damaged component shorts the I2C communication line and prevents the phone from booting. This is a hardware problem that requires physical isolation or microsoldering to fix, and Error 4014 shows the same disconnect signature, usually from a different board-level fault.
Error 4041 and Error 4042 sit in the same 40xx restore-error family as 4013, and both fail later in the restore. Error 4041 is worked host-side first, because antivirus, a firewall, or a VPN blocking Apple's signing servers will produce it, as will an outdated iTunes or Apple USB driver or a damaged non-MFi cable. The fault only moves to the logic board once those checks pass.
Error 4042 lands during a DFU-mode restore and leans toward a board fault, so the section on how 4041 and 4042 differ from 4013 tells you whether you are fixing your computer or the phone.
What Causes Error 4013 on FaceID iPhones
Error 4013 means the device disconnected unexpectedly during an iTunes or Finder restore. On FaceID iPhones (iPhone X and newer), the most common cause is liquid damage to the earpiece speaker flex cable or the ambient light sensor. These components sit near the top of the phone where moisture enters first.
When liquid corrodes the earpiece flex or ambient light sensor, it creates a short circuit on the I2C line. I2C is the communication bus the CPU uses to talk to multiple peripherals during boot. When that line is shorted, the CPU cannot complete its startup sequence and the restore fails.
Other board-level faults can produce Error 4013 as well, including NAND communication failures and baseband issues, but on FaceID models the I2C short from earpiece flex corrosion is the cause we see most often. The same ear speaker flex damage also causes boot loops where the phone restarts repeatedly instead of throwing an error code. An evaluation under a microscope confirms which fault is present.
The I2C Short
I2C (Inter-Integrated Circuit) is a two-wire serial bus. Multiple chips share the same data and clock lines. When one component on the bus shorts, it pulls the line low and blocks communication for every device on that bus. The CPU sees this as a hang during boot and the restore fails with Error 4013 or 4014.
Why Software Restores Cannot Fix Error 4013
On FaceID iPhones, Error 4013 is a hardware failure in the vast majority of cases. The I2C line has an electrical short caused by corrosion from liquid exposure. No DFU restore, firmware update, or third-party tool can clear a physical short circuit on the logic board.
That said, not every hardware 4013 case requires microsoldering on the logic board itself. The first diagnostic step is disconnecting the earpiece flex cable and attempting to boot the phone normally. If the phone boots without the earpiece flex connected, the short is on the flex assembly, not the board.
In those cases, cleaning the corrosion with isopropyl alcohol or replacing the flex assembly is enough to resolve the error. Microsoldering is only needed when the short is on the logic board itself.
Online forums suggest trying multiple DFU restores, using different USB cables, or downgrading iOS. None of these address the root cause. Each failed restore attempt wastes time while corrosion continues to spread if the underlying liquid damage has not been cleaned and treated.
Stop retrying the restore. If the failure is caused by liquid damage, corrosion continues to spread while you troubleshoot. Repeated restore attempts will not clear a hardware short. If your phone shows Error 4013 or 4014, the problem is on the board and needs physical repair.
How We Fix Error 4013
- Disconnect the earpiece flex: We open the phone and physically disconnect the earpiece speaker flex from the logic board.
- Test boot without flex: If the phone boots successfully without the flex connected, the short is isolated to the display assembly and we can immediately extract your data without touching the logic board. No microsoldering, no board-level repair; the price reflects that.
- Board-level repair (if needed): If the phone still fails to boot, the short is on the logic board itself. We remove the RF shields, locate the shorted I2C components under a microscope, and use microsoldering to clear the fault so the CPU can communicate during boot.
- Data extraction: Once the phone boots, we enter the passcode and safely copy your photos, messages, and contacts.
Pricing
No board work needed; disconnect flex, extract data
Short is on the logic board; requires component-level work
If the phone boots by simply disconnecting the damaged earpiece flex, there is no board-level repair involved and the price reflects that. The $750 range applies when the short is on the logic board itself and requires microsoldering under a microscope.
Soft 4013 vs. Hard 4013
Not all Error 4013 cases require the same level of repair. The first diagnostic step separates “soft” 4013 (fixable by disconnecting a flex cable) from “hard” 4013 (requires board-level microsoldering). The distinction determines the repair time, complexity, and cost.
| Attribute | Soft 4013 | Hard 4013 |
|---|---|---|
| Test | Disconnect earpiece flex, attempt boot | Disconnect earpiece flex, attempt boot |
| Result | Phone boots normally without flex connected | Phone still fails to boot or throws 4013 again |
| Cause | Short is on the flex assembly, not the board | Short is on the logic board itself (I2C line, NAND, or baseband) |
| Fix | Clean corroded flex with IPA, or replace flex assembly | Shield removal, microscope inspection, microsoldering to clear shorted components |
| Data extraction | Boot without flex, enter passcode, copy files | After board repair restores boot |
| Cost | Reduced rate (no board-level work) | $750 for FaceID models |
For hard 4013 cases, an oscilloscope on the I2C clock and data lines confirms whether the bus is stuck low (short to ground) or simply not toggling (no communication). A stuck-low reading points to a specific shorted component on the bus.
No toggling at all may indicate the CPU is not driving the I2C controller, which is a more serious fault. The oscilloscope reading guides the next repair step.
How Do Error 4041 and Error 4042 Differ From Error 4013?
Error 4013 and Error 4014 kill the restore early, when the device drops off the bus, and on Face ID iPhones that is a hardware fault, not a software one. Error 4041 and Error 4042 die later. 4041 is worked host-side first, in the software or the cable feeding the restore; 4042 shows up during a DFU-mode restore and points to hardware.
| Error code | Where the restore dies | Host-side check first | Board-level cause when host checks pass |
|---|---|---|---|
| Error 4013 | Early, at the iTunes or Finder USB handshake | Known-good MFi cable, rear USB port, no hub | I2C short from a corroded earpiece flex or ambient light sensor |
| Error 4014 | Early, same disconnect signature as 4013 | Same cable and port check as 4013 | CPU, RAM, or NAND communication failure |
| Error 4041 | Mid-restore, while the host verifies the IPSW with Apple | Antivirus, firewall, or VPN blocking Apple's signing servers; outdated iTunes or Apple USB driver | Short to ground on a PMIC rail, or a NAND storage fault |
| Error 4042 | During a DFU-mode restore | Failing battery, damaged non-MFi cable, unstable port | Boot timeout waiting on storage, fractured SoC solder joints, or a corroded peripheral holding a data line low |
A failed USB data IC is not what produces a 4041 or a 4042. When Tristar on iPhones before the iPhone 8, or Hydra carrying the U6300 designator starting on the iPhone 8, fails completely, the phone does not enumerate on USB, so the computer can't see it well enough to begin a restore. A 4041 or a 4042 means the restore started, negotiated, and got somewhere before it failed. The data path was working.
That is diagnostic information, not trivia. It rules out the USB controller before anyone heats a board, and it points the measurement at the power rails, the storage, the solder joints under the SoC, the battery, or a corroded peripheral instead.
Error 4041: Host-Side Blocks, Then the Power Rails
Error 4041 is worked as a host-computer problem before it is treated as a phone problem. Antivirus, a firewall, or a VPN can block your computer from reaching Apple's signing servers while iTunes or Finder verifies the IPSW, and the restore dies mid-verification. An outdated iTunes install or a stale Apple USB driver does the same thing, as does a damaged, non-MFi, or non-original cable on an unstable port or a hub.
Work the host side first, in this order:
- Update iTunes and the Apple USB driver on the computer running the restore.
- Retest with a known-good MFi cable in a rear USB port, no hub in the path.
- Pause antivirus, firewall, and VPN software for one attempt so the IPSW can verify against Apple's servers.
When every host-side check passes and the restore still dies at 4041, the fault moves to the logic board. A documented failure mode is a short to ground on a PMIC rail, pulling current the rail shouldn't draw while the PMIC heats. We catch that by watching current draw on a current-limited DC supply, then locate the heat with a FLIR thermal camera. Storage-chip faults are the other documented board-side cause.
Error 4042: DFU-Mode Restore Failures
Error 4042 appears during a DFU-mode restore, and it leans hardware. Rule out the cheap causes first: a failing battery that can't hold the phone up through the restore, a damaged cable, and a flaky USB port.
Past those, the documented causes are board-level. The restore can time out while the device waits on its storage. Fractured solder joints under the SoC can stop the phone from transitioning out of the DFU ramdisk state. A corroded peripheral can hold a data line low, which is one way corrosion from a liquid event surfaces as a restore error rather than a dead phone.
Each of those is a microsoldering repair on the original board. We reball fractured joints on a Zhuo Mao BGA station and replace corroded components with a Hakko FM-2032 and Atten 862 hot air, working under a stereo microscope, until the original board boots. Then you enter your passcode and the phone copies its own files over USB.
Stop troubleshooting when the checks stop changing the outcome. If the driver update, the cable and port swap, and the security-software pause all came back clean and the same 4041 or 4042 still lands, more restore attempts won't clear a hardware fault. Everything left on the list is a measurement on the board, not a setting on your computer.
Send it in sooner if liquid was involved, or if the phone stops powering on at all between attempts, because corrosion keeps spreading while it sits. Evaluation is free, and if we can't get the data off, you don't pay.
A board-level 4041 or 4042 repair on a Face ID model runs $750, the same flat rate as a hard 4013, and all of it happens in-house at the Austin, TX lab alongside the rest of our board-level iPhone data recovery work.
Other iTunes and Finder Restore Errors
- Error 14: usually storage exhaustion during an iOS update, which commonly leaves the phone in a bootloop. A bad cable, an unstable port, or a corrupt IPSW download can also trigger it.
- Error 1110: the phone cannot complete writes to its NAND flash storage during the restore.
- Mail-in data recovery: nationwide mail-in path into the Austin, TX lab.
Does Finishing the Restore Erase the Data on Your iPhone?
Yes. In iTunes and Finder, Restore reinstalls iOS onto an erased device, while Update reinstalls iOS and keeps the personal data already on the phone. The erase belongs to the Restore path, so every retry of a failing restore is another attempt to run the step that clears the phone.
Recovery mode by itself takes nothing off the phone. It is a prompt with two buttons, and the button you press decides the outcome. Update writes a fresh copy of iOS and leaves user data where it sits. Restore clears the device first, then installs iOS onto an empty phone, and the setup screen that follows is the phone asking for a backup because there is nothing left on it to load.
- Update
- Reinstalls iOS over the install that is already there. Photos, messages, contacts, & app data stay in the NAND as encrypted data and decrypt in place once the phone boots and you enter your passcode.
- Restore
- Erases the device, then installs iOS onto the empty phone. The key hierarchy that unwrapped your files is wiped with them, so what remains in the NAND is ciphertext nobody can turn back into photos.
The host-side checks for a 4041 exist to separate a computer problem from a board problem. They are not a technique for forcing a restore through. If you keep swapping cables and pausing security software until one attempt finally goes the distance, that completed restore is what takes the data, not the 4041 that kept stopping it.
What state a specific phone is in after a 4041 or a 4042 is not something the error code tells you. A restore that died partway through does not report how far it got. That is a bench question, answered by measuring the board and reading what the phone still holds, not by another attempt from the same computer.
Choose Update, Then Stop the Retry Loop
- Pick Update at the recovery-mode prompt. The Update-never-Restore walkthrough on the boot-loop page covers what to do when Update is not offered at all.
- Stop once the cable, port, driver, & security-software checks stop changing the result. Every further Restore attempt is another run at the step that erases the device.
- Get the board measured instead. Updates that stall on a full data partition throw a different code, which the storage-exhaustion Error 14 page walks through.
Board repair runs the opposite direction from a restore. How board repair reaches the data comes down to fixing the original hardware until the phone boots the iOS install it already had, so you enter your passcode and it decrypts its own files. Nothing is reflashed and nothing is erased.
The USB Data Line: Tristar, Hydra, and the Power Rails
The earpiece-flex I2C short is the fault we see most on FaceID boards, but it isn't the only way a phone throws 4013. Error 4013 is a disconnect during the iTunes or Finder DFU handshake on the USB data line. When a restore dies immediately at 0 to 10 percent with a cable we already know is good, the fault is usually the data path into the board, not the software on your computer.
Two separate board faults produce that signature, & the repair for each is different. We measure the board before we heat anything, so we know which one we're chasing.
Root cause 1: the USB data IC
The USB data controller negotiates the data handshake with iTunes or Finder. On iPhones before the iPhone 8 that IC is Tristar; starting on the iPhone 8 it is Hydra, carrying the U6300 board designator.
A dead or degraded USB data IC breaks the restore handshake even with a known-good cable, so the phone drops off the bus & iTunes reports 4013. Charging can still work while the data line is dead, which is why a phone that powers up can still fail every restore.
The fix is microsolder-replacing the failed IC with a Hakko FM-2032 & Atten 862 hot air so the data line negotiates again. This is a distinct fault from the earpiece-flex I2C short covered above.
Root cause 2: the PMIC and the power rails
Liquid corrosion can short a power rail instead of the data line. When PP_VCC_MAIN or a NAND rail collapses mid-restore, the PMIC can't hold the CPU or NAND supply, the phone drops off the bus, & iTunes reports the same 4013.
On the iPhone 8 a short on PP3V0_NAND makes the PMIC heat & forces the phone into DFU; the iPhone 11 & later step the NAND supply down to PP2V63_NAND alongside PP0V9_NAND & PP1V8_NAND, so the rail we probe depends on the model.
A collapsed rail is a different repair than a dead USB IC: we find the shorted capacitor or corroded component, remove it, & rebuild the rail so the PMIC holds voltage again.
Telling the two apart is a measurement, not a guess. We put a multimeter in diode mode & read the USB data lines (D+ and D-) & PP_VCC_MAIN or the NAND rails against a known-good reference board. A normal forward-voltage drop reads 0.3 to 0.7V; a reading near 0.0V is a short to ground.
A shorted rail also draws current it shouldn't, so a FLIR thermal camera under a current-limited DC supply shows the failed component heating up, & that's the part we go after.
This is why a data-recovery lab that microsolders can separate a software problem from a board problem before touching the phone. If your phone reads as dead rather than failing a restore, the won't-turn-on path covers the no-boot-current case.
Error 4013 Does Not Mean Your Data Is Gone
A 4013 error is a board-communication failure, not a sign your data was erased or is floating around freely readable. The photos, messages, & contacts sit intact in the NAND as encrypted data. What failed is the electrical path that lets the phone boot & talk to your computer, which is a repair, not a loss.
On A7-and-later iPhones (iPhone 5s onward, which covers every FaceID model), the storage is protected by hardware Data Protection. Decryption needs three originals together: the paired NAND, the original SoC with its Secure Enclave, & the owner's passcode. Those pieces have to work as a set on the original hardware.
That's why pulling the memory chip off the board does nothing on these devices. A removed NAND yields only ciphertext, because it is cryptographically paired to its own SoC; a blank or foreign NAND swapped onto the board can't be decrypted either.
The recovery path is to repair the original board so the phone powers on, then let you enter your passcode so it decrypts its own data in place. We never work around the passcode or the Secure Enclave, & we don't need to.
The one real limit
If the SoC itself is physically destroyed, the hardware-fused keys are lost forever & the data is unrecoverable. That is a genuine limit, not a sales hedge. Short of that, the same board-repair logic that fixes the 4013 also restores access, the same way our NAND failure & water damage cases decrypt in place under the owner's passcode.
Your Phone Does Not Need to Be Submerged
Many Error 4013 cases come from phones that were never dropped in water. Humidity, sweat during workouts, condensation from temperature changes, and minor splashes all introduce enough moisture to corrode the earpiece flex connector. The corrosion builds gradually until the I2C line shorts and the phone fails during a routine update or reboot.
If your FaceID iPhone suddenly started showing Error 4013 during a restore and you don't recall any water exposure, moisture ingress over time is the most likely cause. An evaluation under a microscope confirms it.
Frequently Asked Questions
What is iPhone Error 4013?
What is the difference between Error 4013 and Error 4014?
Can I fix Error 4013 with software?
My phone was never submerged. Can it still be liquid damage?
How much does Error 4013 recovery cost?
Is Error 4013 the charging port or the USB data chip?
If the phone won't restore, can't you just read the memory chip?
What is iPhone Error 4041?
What is iPhone Error 4042?
Does restoring my iPhone erase my data?
Data Recovery Standards & Verification
Our Austin lab operates on a transparency-first model. We use industry-standard recovery tools, including PC-3000 and DeepSpar, combined with strict environmental controls to maintain drive integrity. This approach allows us to serve clients nationwide with consistent technical standards.
Open-drive work is performed in a ULPA-filtered laminar-flow bench, validated to 0.02 µm particle count, verified using TSI P-Trak instrumentation.
Transparent History
Serving clients nationwide via mail-in service since 2008. Our lead engineer holds PC-3000 and HEX Akademia certifications for hard drive firmware repair and mechanical recovery.
Media Coverage
Our repair work has been covered by The Wall Street Journal and Business Insider, with CBC News reporting on our pricing transparency. Louis Rossmann has testified in Right to Repair hearings in multiple states and founded the Repair Preservation Group.
Aligned Incentives
Our "No Data, No Charge" policy means we assume the risk of the recovery attempt, not the client.
Technical Oversight
Louis Rossmann
Our engineers review all lab protocols to maintain technical accuracy and honest service. Since 2008, his focus has been on clear technical communication and accurate diagnostics rather than sales-driven explanations.
We believe in proving standards rather than just stating them. We use TSI P-Trak instrumentation to verify that clean-air benchmarks are met before any drive is opened.
See our clean bench validation data and particle test videoRelated services
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