Makes me wonder if the Heat Exchanger on the Hybrid exhaust is blocking the exhaust? Maybe when really cold outside? Possibly frozen and blocking the flow of exhaust (hot Cat). Incomplete combustion creating the sulphur smell? It does not seem to do this in warm weather or once engine warms up. The cherry red hot Cat is not good. Hopefully we get an answer sooner than later. A lot of great observations and comments on this forum!
Just thinking out loud...
Just thinking out loud...
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