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      05-27-2023, 06:29 PM   #1
Shartibartfast
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Drives: M2C
Join Date: Jan 2015
Location: USA

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Question Why are my exhaust valves always open?

I bought a 2018 M2 with Remus catback a few weeks ago, and I'm trying to figure out why my exhaust valves are both always open. At startup, in comfort, sport, sport+, and traction mode. They don't actuate, ever.

I checked the harness and the Remus splitter is plugged into both valves and into the OEM harness. Also checked that fuses 145/146 are present. Also pushed the BC button for 2 seconds to see if it has Macht Schnell EVC... nope. There is also nothing plugged into the OBD2 port.

Aside from a potential harness failure, what am I missing? Is there potential coding that could do this?
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