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E90 OBDII Codes

adr_an
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adr_an Rookie

adr_an

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My 328xi had the "service engine soon" light come on and it somewhat goes off and on. I pulled many codes and I don't know how to diagnose them. Codes are: 2C7C; 2C78; 2CA9; CF17; P0160. Does anyone know a website or how to diagnose this? Thank you.

Greydog Grand Master

Greydog

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Morning Adrian

If my old memory is working the first codes are related to the O2 sensors, CF17 would seem to be Drive train related. So when was the trans last serviced? the last PO160 code is again O2 related.

I would start the process with a full engine and Trans service and replace the O2 sensors

Attached is a full list of BMW OBD codes

Good Luck

Dave

BMW PDF OBD Codes.pdf

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