Computer/Controls - MIL ON and DTC 29F4/29F5 Stored

SI B12 20 11
Engine Electrical Systems

November 2012
Technical Service

This Service Information bulletin supersedes SI B12 20 11 dated September 2011.

[NEW] designates changes to this revision

SUBJECT
N54, N54T - Catalytic Converter Conversion Faults Stored

MODEL
E89 (Z4) with the N54 and N54T engines produced to 8/31/2011

SITUATION
The Service Engine Soon (MIL) lamp could come on with one or both of the following faults stored in the DME:

^ 29F4: catalytic converter conversion - bank 1

^ 29F5: catalytic converter conversion - bank 2

CAUSE
DME software diagnostic error

CORRECTION
Do not replace any parts!

[NEW] Follow and complete the recommended diagnostic test plans using the latest version of ISTA/D.

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.

Vehicle integration level (New) E89X-11-09-501 or later.

Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.

For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle Programming.








WARRANTY INFORMATION