C120C fault code: what it means

C120C: BYD: chassis (brake/steering) system software fault. ABS/ESC or steering warnings may show.

Chassis (brakes, steering, suspension) · Costly if missed

Usual causes, most likely first

module software needs update
module fault
low 12V supply

C120C by make

BYD

BYD: chassis (brake/steering) system software fault. ABS/ESC or steering warnings may show.

Usual causes: module software needs update; module fault; low 12V supply

Not sure what C120C 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.