To answer my own question, the answer is yes, it does in fact cause a CEL. The code is 'P0401 - Exhaust Gas Recirculation "A" Flow Insufficient Detected' and I'm hoping to have it mapped out later this week. Hope it helps someone!
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2006 E90 M Sport | BSM | KW Variant 1 | BMW Performance | Style 95 | SSDD Motorsport | M Style | Kenwood | Lightwerkz | Hartge Japan
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