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2016 RRS SCV6, 61,794 miles, check engine light came and went the past month and finally set permanently. Dealer ran diagnostics and updated PCM software per TSB LTB010080NAS2. Great dealer service advisor suggests the inexpensive PCM update before replacing the fuel pressure regulator. Hopefully this fix is it.

Maybe it’s me- maybe not- but noticed a change in the shift points- somewhat more sportier. That could be the PCM relearning driving pattern- maybe it’s a software update.


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