During normal operations—such as printhead cleaning cycles or borderless printing border-trimming—Epson EcoTank printers flush excess ink into a physical storage block containing absorbent felt sheets. This component is known as the (or "diaper").
Scroll down to find Waste ink pad counter and click OK. Check & Initialize: Check the box for "Main pad counter." Click Check to see the current usage. Click Initialize to reset the counter to zero.
A pop-up dialog box will appear asking you to confirm the reset. Click .
Locate the extracted folder and double-click on (or AdjProg Rev3.exe ) to launch the software. Step 3: Select Printer Model and Port In the initial window, click the Select button. Under the Model Name drop-down menu, choose your exact printer model (e.g., Epson L4150 Epson L4160 adjprog l4150 l4160exe
At this point, the printer locks up and refuses to print. The official solution is to replace the waste ink pads (an expensive, labor-intensive process). The unofficial solution is to use adjprog l4150 l4160exe to reset the counter.
| Error Code | Meaning | Fix | | :--- | :--- | :--- | | Communication error | USB cable not detected or printer in sleep mode | Reconnect USB, wake printer, restart PC | | "Key is invalid" | Wrong initialization key | Find correct key for your version | | "Model mismatch" | You selected L4160 but have L4150 firmware | Restart and select correct model | | Program crashes on launch | Missing DLL files (e.g., mfc42.dll) | Download and register missing Visual C++ runtimes |
. An error message or pop-up will typically display a unique Hardware ID . Copy this ID. Generate License : Open the folder and run the license manager. Add License and enter a name (e.g., "User") and the copied Hardware ID Create License Key Register Program Check & Initialize: Check the box for "Main pad counter
AdjProg (Adjustment Program) Epson L4150 is a service utility used primarily to reset the waste ink pad counter when the printer displays a "Service Required" error
These tools are but for authorized service centers. Improper use can permanently alter printer EEPROM data or void warranties.
Before you apply the fix, it helps to understand what the software is targeting. The Epson Adjustment Program focuses specifically on two counters: Before you apply the fix
This process is required to bypass the software's copy protection.
In a 2023–2025 sampling of 50 adjprog -named executables targeting L4150/L4160:
This software allows technicians to perform maintenance tasks that are normally restricted to service centers. The most common use is resetting the Waste Ink Pad Counter
The primary reason most users seek this file. Print Head ID Input: Used when replacing the print head.
Running any unofficial adjustment program immediately voids Epson warranty, even if the hardware was otherwise fine.