Pnp0ca0 Jun 2026

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:

Sometimes a Windows Update can introduce driver incompatibilities.

In the ACPI namespace, this device often appears with a of USBC000 and a Compatible ID (_CID) of PNP0CA0 . pnp0ca0

The acronyms behind PNP0CA0 trace how modern operating systems interact with power hardware:

The PNP0CA0 compatible hardware string tells Windows to spin up the standard Microsoft UCSI driver ecosystem to bridge communication between the system software and that controller. In the Windows Driver Foundation Framework, maps directly

Restart your system to allow the firmeware to re-enumerate the physical ACPI tables. 3. Reinstall the UCM-UCSI Component

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. In the ACPI namespace, this device often appears

Developers have identified a subtle bug in some designs where the ACPI declares an "EmbeddedControl OpRegion" inside the scope of the USB Type-C device ( PNP0CA0 ). When the OS tries to use this region, it fails with an "AE_NOT_FOUND" error. This is because the OS requires a specific "handler" for that OpRegion, and the firmware incorrectly assumes it exists.

– e.g., a udev rule, DSDT override, or custom driver stub.

Hold down the continuously for a full 45 to 60 seconds . (The machine may turn on and off during this period; keep holding).