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      02-20-2023, 10:50 PM   #1
GrayZ4MCoupe
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Drives: E86 M Coupe
Join Date: Feb 2023
Location: Midwest

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Exclamation Modded S54 E86 Z4 M Coupe - Codes 29F4 and 29F5 - Catalytic Converter Conversion ??

Hi everyone, I have a "Service Engine Soon" light on my dash and was looking for help on these codes that I pulled:

0029F4 - Digital Motor Electronics (DME), catalytic converter conversion
0029F5 - Digital Motor Electronics (DME), catalytic converter conversion 2


The car has a Schrick 288/280 cam, Eventuri intake, Supersprint headers, & Rpi Exhaust for the motor mods.

Bad O2 sensors? Bad cats? Bad something else? Haven't been able to find much about these exact codes for the S54 online.

Also, not sure about the alternator code 2E97, but that could be because I didn't have the car engine running and only on ignition position 2 during the reading of the codes.

Thanks in advance!
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