Hello new member here from Tracy California. I am stumped with an issue on my 04 CTT. I bought my Cayenne from a Porsche mechanic who owned it for 8 years and its been dealer serviced its entire run so far before me. After about a year of driving it with no issues i shipped it to NY for my uncle to enjoy for awhile. He started to have a lot of complaints about the truck but what i found just found out the car was being tampered with by a mechanic in NY. My uncle passed away after about 6 months of ownership and i had the truck shipped back to CA. Cel on dash so i start going through codes and making fixes. I find weird things like unplugged sensors and hoses wrapped around the front rail and put 2 and 2 together about what was going on because of the fact I knew it was dealer serviced. I am getting stumped on this last psm failure and the bottom rows of both right and left fuse boxes have no power. and the 10amp psm is out too. I read about the 433 relay and replaced that and still nothing. What am i missing?

 

Welcome! I’m moving this to the Cayenne section. Hope you get an answer.

 

Join the Rennlist Cayenne forum too and the Facebook group. Not as much activity over here anymore and the others are more active where someone may be able to assist you - larger audience = better odds.

 

Thank you