When driving in high ambient temperatures, repeated stop and go or high-load operation over distances, the engine performance of a 2015 BMW 3 Series
can be reduced.
This bulletin applies to 2015 BMW 3 Series. When driving in high ambient temperatures, repeated stop and go or high-load operation over distances, the engine performance can be reduced. The air conditioning system blower output may also be reduced and in some cases, the compressor may be switched off. One or both of the following DTCs may be stored in the DME:
1A2108 (electric fan, self diagnosis, interval stage 1: minor fan fault)
241400 (electric fan, diagnosis feedback 1: fan slightly stiff)
The MIL may be on as well.
A DME software error in the control of the 600W electric fan over-boot or high speed function. The electric cooling fan design was not robust enough for continuous over-boost or high speed operation. Replace the fan housing with an improved 600W electric fan. Program the vehicle using the latest version of ISTA/P. For F3x rear drive applications, use P/N 17 42 8 641 964. For F3 x Drive, use P/N 17 42 8 641 965.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
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