a while back I purchased a Durametric cable for my 2008 Cayenne GTS ... to trouble shoot CEL and some codes ... ...

Prior to this I have already removed each MAF and spray cleaned them with proper electric component cleaner ... I've also changed both air filters, because the prior owner had installed the "oiled type" ... I did not think anything of it, since for over 2 years and maintenance at the Porsche dealer, no CEL light had come on ... now, 6 months after CPO warranty expires ... the darn CEL light comes on!!! Murphys Law!

so before I start changing MAF sensors and other parts ... just wanted to run these codes by the community to see if anyone has similar experience ....

0171 - System too lean Bank 2 (code leads me to believe, maybe MAF?)
0174 - System too lean Bank 1 (code leads me to believe, maybe MAF?)
..... so both MAF sensors are bad????

0140 - Lost Comm w/body control module - no signal communication
...... have not researched this one .. since I'm still fighting with the codes above

2403 - EVAP: emmission system leak detection pump sense circuit/open

1539 - Oil Pump Control - value below lower limit value