Thread: Strange codes?
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Old 12-24-2012, 03:28 PM
pshovest pshovest is offline
BMW CCA 69606
Location: DE
Join Date: Dec 2009
Posts: 743
Mein Auto: '10 535iA, '00 528iTM
US spec BMW's have a CEL, Check Engine Light, that turns on when there are codes stored. Did you have a light on dash when you found misfire codes? Need to find out if you have a similar light or if you are suppose to have a similar light. On US cars, running without pre-cat sensors will turn on CEL.

Looks like there was an option for Catalyst delete on your car. See upper right corner of attachments.
Pre-cat O2 sensors may be on backside of exhaust manifold making them difficult to see.
Attached Files
File Type: pdf 523i Catalyst - 1.pdf (225.2 KB, 43 views)
File Type: pdf 523i Catalyst - 2.pdf (142.7 KB, 46 views)
File Type: pdf 523i Catalyst - 3.pdf (163.7 KB, 39 views)
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