Engine Controls - Driveability/DTC 2AF9 Stored

SI B12 07 12
Engine Electrical Systems

April 2012
Technical Service

SUBJECT
S65: Engine Coolant Temperature Sensor Is Faulty

MODEL
E90, E92, E93 M3 with the S65 engine

SITUATION
The engine could enter the emergency program or experience performance and rough idle complaints.

The following fault may also be stored: 2AF9: Coolant temperature sensor

CAUSE
This could be caused by an internal fault of the coolant temperature sensor or a sporadic connection problem with the temperature sensor connector, due to vibration-induced movement.

CORRECTION
Replace the coolant temperature sensor, and install a coolant temperature sensor harness repair kit.

Follow the ISTA D Repair Instruction: 12 51 xxx - Exchanging plug-in contact of coolant temperature sensor (S65).

Note:
When the ISTA system message displays: Battery voltage only "XX.XX" V. Please connect charger. Please note the displayed battery voltage reading in the repair order comments section.





PARTS INFORMATION








WARRANTY INFORMATION