u/Playful_Mastodon_404

My 2006 R53 has 110,000 miles on it.

The symptoms are:

- P1237 (Pressure sensor, intake manifold before compressor input low) comes on with the engine light when driving normally.

- When pushed harder, P1688 (Electronic throttle monitor ring level 2/3 air mass calculation error) comes on and the car goes into limp mode, almost stalling. Well at one point it felt like it.

- It can turn on and off fine but once you let it cool down overnight it has trouble starting. However, once warmed up it starts up fine.

Any help or ideas to what could cause this

I was thinking maybe it’s a vacuum or boost leak or MAF or MAP sensor malfunction