stevethe6th

This may explain the drop-off in performance:

Fault Number: P0021
Description: A Camshaft Position -Timing Over-
Repair Infomation: Advanced or System Performance B2

Fault Number: P0344
Description: Camshaft Position Sensor "A"
Repair Infomation: Circuit Bank 1 or Single Sensor
Repair Infomation: No signal / Communication

Fault Number: P1657
Description: Overrun recirculating air valve
Repair Infomation: output stage
Repair Infomation: No signal / Communication

Any chance these three are related? A common circuit/fuse perhaps?

stevethe6th

Turns out they're all wired to the same part of the same wiring harness that was eaten (allegedly) by the same rodent. No - really.

skl

Will Porsche cover a "rodent" issue under warranty???

ltc

Another successful covert operation for Larry's squirrels.

stevethe6th

Only if the rodent is a factory installed option. Although I might be able to claim emissions warranty.......

Designer

I had a similar problem. My insurance covered it.

(Minus deductible, of course)