I never did go back to the dealer for the P203A code. It finally cleared itself and everything had been running fine best I could tell.
I even had one my best MPG for a tank full commuting, 32MPG! My MPG improves during the colder months of winter as I don't need/use the A/C. This is proven to be substantial at approx 1-2mpg better without the A/C. My typical is 29MPG.
Now I have a new code that was thrown yesterday.
P205C Reductant Tank Temperature Sensor Circuit Low. WTF????
The temperature here in South Florida was like 68 degrees yesterday, so I'm wondering if it is really a low temp or just a bad circuit?
Anyway, I'm nearing my next service in about 2k miles so hopefully no other surprises pop up. It would appear that almost all of my issues have been related to the DPF and DEF systems on this car.
2010 Black 335D Sport/Premium, Michelin PSS 235/265
2000 Silver Z3 3.0i (Ret)
1999 Silver R1200C (Ret)
1968 Black 1600 Coupe (Ret)