I'd wait for codes and get an Indy to replace.
DIY is possible too, you could get the intake valves cleaned at the same time.
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Car: e91 330d with Viezu map
Gone but not forgotten: 2010 Jaguar XFR (Cat-back exhaust, pulley, intake mods and map), Highly Modified E90 335i LCI M Sport Manual (circa 480BHP/500lb ft)
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