Hi Everyone long time member but I haven't posted before. I have a 2008 Cayenne Turbo with around 150k miles.

I had noticed that my throttle has been a little more sensitive than normal, but aside from that the truck ran fine so I checked the codes

I had gotten a few codes a few weeks ago for:
0121 throttle/pedal position position sensor
0524 Oil-pressure sensor
2181 Cooling system performance
0456 Evaporative emission system leak(very small leak)
1247 Basic boost pressure adaption

I cleared the codes and have been driving it since august 28.After clearing the codes the throttle was still a little more sensitive than normal, but aside from that the truck ran fine. I went to start it yesterday, and it cranked but didn't start. Then it started reved to 1800 and turned off. the code 1314 has showed up as well as 0700(transmission fault) and 1559(current power supply without engine operation)

Today I went out again to see if it would start, the first few times it kept saying step on break, which I was doing, and I am getting lights on in the dash for PSM failure, Chassis system faulty, Oil Pressure monitoring failure. The truck still either doesn't crank and says step on break, cranks and doesn't start or starts and dies.

Either I am having multiple system failures, or something links everything together. Any insight would be great I would rather not start buying random unnecessary parts.

All codes were scanned with an iCarsoft scan tool. I also have a durametric but I have not hooked that up yet.