I start my car and the CEL light comes on. To make a long story short I get 3 blinks at the 8 pin connector. Lambda control module???? Not familiar with this. Any suggestions?

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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k