2053348/5

W12 Engine management light on - Turbocharger speed sensor DTCs stored. Customer statement / workshop findings; - The engine management light is on. Workshop findings: The customer statement can be reproduced. Either of the following DTCs are stored in address 01 Engine Control Module 1 or address 11 Engine Control Module 2 - P257900: Turbocharger Speed Sensor A - Circuit Range/Performance Or - P259400: Turbocharger Speed Sensor B - Circuit Range/Performance Or - P259500: Turbocharger Speed Sensor B - Circuit low