Pnp0ca0 High Quality Jun 2026

If you have recently looked at your Windows Device Manager and noticed a warning symbol on a device labeled ACPI\PNP0CA0 or , you are not alone. This is a common issue, particularly on modern laptops and desktop computers utilizing USB Type-C technology.

Determine whether your system relies on PNP0CA0 (UCSI) or a direct I2C connection. Check for the INT3515 device in your ACPI tables:

In the Windows Driver Foundation Framework, maps directly to the Universal Serial Bus Type-C Connector System Software Interface (UCSI specification). Modern motherboards utilize an Embedded Controller (EC) to handle the complex physics of USB Type-C connections. PNP0CA0 allows Windows to communicate with that Embedded Controller using two specific system drivers:

? Knowing the model can help narrow down the exact driver package you need. pnp0ca0

Fast Startup or deep hibernation states freeze the Embedded Controller (EC), stopping device initialization.

Reconnect your power source and boot into Windows. Check the Device Manager to see if the error has cleared. Step 2: Update the System BIOS/UEFI

If you're looking for content explaining what pnp0ca0 is, here's a ready-to-use post outline you can adapt: If you have recently looked at your Windows

In some systems, UCSI must be explicitly enabled in the BIOS settings.

Disclaimer: This article focuses on troubleshooting Windows systems and firmware interactions based on common hardware patterns as of 2026. If you are still experiencing issues, AI responses may include mistakes. Learn more

Users on Linux sometimes encounter issues where USB-C charging or display output fails because the BIOS "hides" the PNP0CA0 device from non-Windows operating systems. Check for the INT3515 device in your ACPI

: Allowing a laptop to change from drawing power from a monitor to outputting power to a smartphone over the same port.

On Windows, a different issue can arise related to PNP0C0A (often confused with PNP0CA0 but similarly related to ACPI power). Users report that their laptop shows a "smart adapter isn't powerful enough" error even with a working charger. While this is often resolved by resetting the power management hardware, it highlights how ACPI power objects handle battery and charger negotiation.