Fuel System - DTC 4B1C Fuel Filter Heating Cont. Info
SI B16 01 10
Fuel Supply Systems
January 2010
Technical Service
SUBJECT
M57Y FC: 4B1C Fuel Filter Heating, Control
MODEL
E70 and E90 with M57Y
SITUATION
During diagnosis, the fault code 4B1C (Fuel filter heating, control) is stored in the DDE.
CAUSE
This fault code is generated due to a software error in the diagnostics of the DDE.
Information
2010 BMW 335d Sedan (E90) L6-3.0L DSL Turbo (M57Y) Page 252
Do not replace any parts. This fault will not turn on the "Service Engine Soon" lamp. Continue with diagnosis of other faults if they are stored in the
DDE. This error in the software will be corrected in a later version of ISTA.
