What brand Opti is it? Doubtful the Opti has oil on it if new. I don't think it's the Opti, but if the temp sensor issue doesn't fix the stumble I don't know where else to look.The temp sensor is new but I will check the wire connection. The opti is new but you think it may have a oil leak that has coated it? Sucks it ran really good after I cut the cat off. This is one thing I noticed is this a problem (Bit# 5: Injector Fault Detected This Run Cycle) this is in the engine status bits.
I didn't see anything with the injector fault.