[Flight335d]

2011 335D 240K miles, only mod is EGR valve turned off (pin removed) after CBU cleaning 12/24/2018 about 6 years and 54k miles ago.

During track night a Sebring yesterday the car went into limp mode on my fith lap. Oil temp was 190 degree , I let it cool off for an hour, no more Limp Mode, second session went into Limp Mode at Turn 2

Blue Drive code reader indicates:

P0101=Mass Air Flow
2042A = Catalyist Temp Sensor Bank 1 Sensor 2
20425 = Catalyist Temp Sensor Bank 1 Sensor 1
p0299 = Underboost Condition/ Turbo Boost Sensor

Woudl like to here what the community thinks the problem actually is?

Mass air sensor was replaced in 2017

I have a good local mechanic who diagnosed a fuel rail sensor when first got the car in 2018 at 175K.

No more Limp Mode at start up today.

Any help is greatly appreciated..