Epson Printhead Temperature Errors 0x43, 0x42, 0xE2, and "Head ID Byte at Index 5 Is Out of Range"

Question

I recently received several printer errors related to the printhead temperature and printhead identification. One message said, "Head ID byte at the index 5 is out of range." WICReset also showed error 0x43, described as a head temperature error, possible printhead failure, or main board failure; error 0x42, described as printhead failure, X-Hot detection during flushing, abnormal temperature detected by the head thermistor, or main board failure; and error 0xE2, described as a PF position PID out synchronized error. The waste station is new, and a new printhead was installed along with the pin cables that came with it. What do these errors mean, and what should be checked next?

Answer

Yes, the errors you mentioned are important, and all of them need to be addressed. However, I would not try to solve all five recent fatal errors at once. When a printer stores several fatal errors, some may be old, some may be caused by previous parts, and some may be secondary errors created after the printer stopped in the middle of a movement or cleaning cycle. I usually start with the most recent error, often listed as error #1, fix that issue first, restart the printer, and then see which error comes back.

For example, the printer may have had a bad printhead several days ago. Then the printhead was replaced, and after that the capping station or waste station may have introduced a new mechanical problem. If the newest error is related to the capping station lock, carriage movement, or PF movement, I would solve that problem first before assuming the new printhead is bad. Otherwise, you may chase an old printhead error while the current failure is actually mechanical.

The message "Head ID byte at the index 5 is out of range" means the printer is reading something abnormal from the printhead identification data or the head-related circuit. This can happen if the printhead is not communicating correctly with the mainboard. Possible causes include a wrong printhead version, a defective printhead, a damaged or reversed FFC cable, poor cable seating, contamination in the connector, a bent pin, a shorted line, or damage on the mainboard's head circuit. However, I would not focus too much on the Head ID message by itself first, because it is usually not a "series problem" in the way some other Epson errors are. It is still useful information, but I would treat it as one part of the larger head-circuit diagnosis rather than the only issue.

WICReset error 0x43 is a serious one. It points to a head temperature error and may indicate printhead failure, mainboard failure, or a problem in the head temperature sensing circuit. The printer is expecting a normal temperature signal from the printhead thermistor circuit. If the signal is open, shorted, out of range, or unstable, the printer may interpret it as an overheated or failed head. This does not always mean the head is physically hot. It may mean the temperature signal cannot be read correctly.

WICReset error 0x42 is also serious and closely related. It refers to printhead failure, X-Hot detection during flushing, abnormal printhead temperature detected by the thermistor, or possible mainboard failure. In plain language, the printer believes the printhead temperature is abnormal during a flushing or cleaning-related operation. This can be caused by the printhead itself, the thermistor line, the FFC cable, the printhead connector, the head driver circuit, a blown fuse, a shorted circuit, or damage to the mainboard.

Because both 0x43 and 0x42 involve printhead temperature or thermistor detection, I would be very careful about repeatedly powering the printer on and off. If there is a short in the printhead cable, printhead, or mainboard head circuit, repeated testing can damage the new printhead, the mainboard, or both. Before continuing to power the printer repeatedly, I would inspect the printhead cables and connectors under magnification. Make sure the FFC cables are inserted in the correct direction, fully seated, straight, and not shifted to one side. Also inspect both ends of each cable for ink contamination, burn marks, scratches, cracked traces, bent pins, or lifted contacts.

Since you installed a new printhead with the pin cables that came with it, I would still verify that the printhead is the exact correct model/version for that printer. Some heads look similar but have different ID or circuit behavior. A physically compatible head is not always electronically compatible. Also check that the new cables are actually correct for the printer and not just included as a generic set.

The error 0xE2 is different. It points to a PF position PID out synchronized error. PF usually refers to the paper feed system. This means the printer expected the paper-feed mechanism to be in one position, but the feedback signal did not match the expected movement. Possible causes include a dirty or damaged PF encoder, a bad PF motor, cable problems, gear timing problems, a jammed feed mechanism, excessive mechanical resistance, or an interrupted movement sequence. However, 0xE2 can also appear as a secondary result after the printer stops in a fatal condition. If the printer tries to move, flush, release the carriage, or feed while another mechanism is stuck, the PF or carriage timing can fall out of sync.

This is where the new waste station or capping station becomes very important. If the white printhead lock on the capping station is not releasing on time, the printer may try to move the carriage or perform a flushing sequence while the printhead is still mechanically locked. That can create abnormal load, interrupted movement, timing errors, and related failures. In that situation, the printer may report head temperature, flushing, PF synchronization, or motion-related errors, even though the original cause is a mechanical lock or timing problem.

I would first check whether the new capping station or waste station is seated perfectly. Make sure it is not sitting too high, tilted, or slightly out of position. Check whether the white locking lever moves freely by hand. Look closely at the spring, cam, gear, tab, and release mechanism. A spring installed one notch off, a cam slightly misaligned, or a plastic tab rubbing against the frame can delay the lock release. Also check that no screw, cable, ink tube, damper line, or plastic piece is blocking the release motion.

With the printer powered off, the carriage should be able to move freely after the lock is manually released. Do not force it if it is locked, but once the lock is released, the carriage should slide smoothly without binding. If it feels like it catches around the capping station area, the station may be too high, misaligned, or not fully seated. Also check whether the pump/capping station timing lines up with the carriage movement. If the cap, pump, or lock is out of phase with the carriage, the printer can fail during startup or cleaning.

After confirming the mechanical side, I would move to the electrical checks. Recheck the printhead cable direction and seating. Inspect the printhead board and mainboard connectors. Look for ink residue, corrosion, burn marks, or melted spots near the head cable sockets. Then check the mainboard fuses and the printhead driver area. A blown fuse or damaged head driver can cause the printer to misread the printhead or report temperature-related errors. If the original printhead failed electrically, it may have damaged the mainboard. Likewise, if the mainboard has a damaged driver circuit, it can damage a replacement printhead.

So, in order, I would approach it this way:

1. Look at the most recent fatal error first, not just the full history.

2. Confirm the carriage lock and new capping/waste station are releasing correctly.

3. Make sure the carriage can move freely and nothing is mechanically binding.

4. Confirm the capping station is seated at the correct height and position.

5. Inspect the FFC cables carefully for direction, seating, contamination, and damage.

6. Verify the printhead is the exact correct version for the printer.

7. Check the mainboard fuses and printhead driver circuit before repeated power testing.

8. Restart only after the mechanical lock and cable issues have been ruled out.

9. See which error returns, because old stored errors may not represent the current failure.

The most important point is that the temperature-related errors 0x43 and 0x42 should not be ignored. They point toward the printhead, head thermistor circuit, cable path, or mainboard. At the same time, the 0xE2 PF synchronization error and the new capping station installation suggest that there may also be a mechanical timing or lock-release issue. A delayed capping station lock release can make the printer behave as if it has a printhead, flushing, or motion problem even after the printhead has been replaced.

Addressing printer issues can be a complicated process because many of these problems require hands-on inspection and testing. For that reason, we are not able to provide remote troubleshooting, repair suggestions, or step-by-step support for individual printer repairs. We do offer an in-person evaluation and repair service through our local diagnostic facility: BCH Technologies Printer Repair Service [https://bchtechnologies.com/printer-repair-service]. Because of high demand, repairs are handled on a first-come, first-served basis, so it may take a few weeks before we can schedule a printer drop-off. Our services are structured to repair either the whole printer or specific parts, with instructions provided on how to proceed. However, we understand that our rates may not be the most economical option for every customer. For that reason, we strongly recommend self-help through online research whenever possible. You can begin by checking YouTube or visiting our channel homepage at BCH Technologies on YouTube [https://youtube.com/@bchtechnologies]. Use the search icon next to "About" on the right-hand side of the channel menu bar to search for specific repair topics. I receive dozens of questions every day asking for videos on specific subjects, and after creating videos for the past nine years, it is difficult to remember every individual video. YouTube's search function is usually the fastest way to locate the most relevant content, and it may also suggest helpful videos from other channels.

Thanks again for sending the exact error codes and details about the new printhead and waste station. Those details are very helpful. I would focus first on the most recent fatal error, confirm that the capping station lock is releasing properly, and then move carefully into the head cable, printhead, fuse, and mainboard checks before doing repeated power-on testing.