U1101 fault code: what it means

U1101: Component protection is active: a module came from another car. Features are limited until a dealer releases it online.

Network (communication between modules) · Costly if missed

Usual causes, most likely first

1. used or swapped control module fitted
2. component protection not released by a dealer

U1101 by make

Not sure what U1101 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.