If the driver stack is corrupted, forcing Windows to rebuild it can clear the problem:
: This hardware object is ubiquitous across modern desktop motherboards (including ASUS ROG, Gigabyte, and MSI series) and high-end laptops from HP, Lenovo ThinkPad, and Acer. Core Functions of the UCSI ACPI Interface
While most users only see this code when troubleshooting a yellow exclamation mark in Windows Device Manager, it is actually the hidden conductor orchestrating how modern laptops handle power and data through their USB-C ports. The Brain of Your USB-C Port
A problem with the pnp0ca0 device (the UCSI driver) could potentially trigger a broader PnP error like 0x000000CA . For example, if the UCSI driver is corrupt or incompatible, the Plug and Play Manager might crash when it tries to load it, leading to the fatal error. However, you can have a problem with pnp0ca0 (like a missing driver in Device Manager) without experiencing a BSOD. pnp0ca0
If you are dealing with a specific error message right now, let me know:
The identifier is found across major desktop and laptop hardware lineups. It is typically named UCM-UCSI ACPI Device or UCSI USB Connector Manager inside the Windows Device Manager. Manufacturer Sample Hardware Models Device Manager Display Name HP EliteBook 840 G5 , EliteBook X360 1040 UCSI USB Connector Manager / UCM-UCSI ACPI Device ASUS ROG Strix Z790-H Gaming , ROG Maximus Z690 Hero UCM-UCSI ACPI Device / Dispositivo UCM-UCSI ACPI Dell Latitude, XPS, and Precision Series TI USB Connector Manager Class Extension Troubleshooting PNP0CA0 "Code 43" and Driver Issues
: Detecting and launching protocols like DisplayPort or Thunderbolt over the Type-C connection. If the driver stack is corrupted, forcing Windows
Manages non-USB signals traveling over the same cable, such as DisplayPort or HDMI .
Managing this complexity requires a sophisticated controller on the motherboard. In many laptop designs, the BIOS uses the standard to allow the operating system to talk to the USB-C controller.
If you can tell me the , I can help you find the exact driver download page to resolve this error. For example, if the UCSI driver is corrupt
UCSI functionality heavily depends on your motherboard's firmware.
showing under "Other devices" with a yellow question mark. "Unknown Device" with Hardware ID ACPI\PNP0CA0 .