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That's a sunroof leak. Your passenger side A-pillar tube is blocked and the water backs up and runs down inside the A-pillar. The easiest way to clear the blockage is to blow the line with an air compressor and check them every few months. Best to also remove the passenger seat bracket so you can get every thing dried out.
I found a cut wire and another that was almost cut in the wiring harness going to the circuit board.
I removed the plug then made a setup with silicone tubing that attaches to an air gun and blow out all four corners every few months
Amazon has these for $133/each Kumho Ecsta STX KL12 All-Season Tire - 275/45R20 106Z
It looks like mine may have been corrosion on the pins of the control unit connector. Still working fine as of today.
PROBLEM SOLVED...Hopefully. I got ready to delve into this earlier this morning and since I'm a firm believer in the KISS method, I disconnected the Tiptronic control unit and reconnected. Now, the manual-automatic is working as it should and the fault is gone. I'll go back and do a thorough cleaning of the pins in the connector, but I am hopeful that this was a simple fix.
2003 Cayenne Turbo
I believe mine was definitely the tire circumference mismatch. Doesn't have to be very much of a difference. I rotated them once they were worn pretty evenly and haven't had the problem since...knock wood
My manual shift works intermittently and after driving for 20-30 minutes P-R-N-D will all light up. Lights go out after car is turned off and restarted. Tiptronic on steering wheel works fine and will shift into manual when selector is in manual, but intermittently switches back to automatic. Sometimes, manual works fine with no problem. I replaced the trim cover even though it wasn't broken and it didn't change anything. Durametric gives me "1045 Selector lever switch - Implausible signal, test conditions are not-completed, fault is currently active and causing a DTC light" Is this code for the selector switch on the side of the transmission or the microswitch at the shift lever? Any other suggestions?
Thanks for the info. They're all the same size, 275/40R20 and all have pretty new tread, but I had to replace the front pair after a cut and tires matching the rears were discontinued.
My AC blower bearings need a little lube and I've dropped the blower out, but don't know how to get it out of the case. I've seen some older posts that talk about it, but never say how to get it out. I definitely don't want to break it!
Thanks for the reply. Not sure what it is. I replaced cooling line a few years ago and the tank last year. If i get it figured, I'll let you know
I have a 2003 TT and recently the PSM traction control light will flash briefly (maybe 3-5 seconds) and the engine drops power, no other indicators, no check engine light, nothing....light stops flashing and engine power comes back. If i turn the PSM off, i have no problems, but with ~4,000 rpm shift points in auto and Borla exhausts, the neighbors are getting tired of me. I was by my mechanic's shop the other day on an unrelated issue and he hooked up the Porsche computer and there were no stored faults in the PSM Management. Anyone seen this? Any ideas?
I had the same issue in my '03 TT...thought it was the vacuum pump itself because it was whining...turns out it was the hose from the pump to the booster. I learned this the hard way by replacing the pump itself. The part number for the hose is 955 355 577 51. If you go to one of the parts websites with parts diagrams, it's #13 under the Brake section, subsection Brake Master Cylinder Brake Booster Vacuum Line Vacuum Pump. There's a bunch of different part numbers but this is the one for the Turbo. as for replacement, it's not that difficult. I mean it is a pain in the butt like almost anything with a Cayenne Turbo, but it's less challenging than a lot of things. First, remove the engine bay trim and then You've got to remove the windshield wipers and cowl. Be extremely careful with the wiper removal, mostly the driver side because it's extremely easy to crack the windshield, if you're not careful...again, learned this one from experience. If it's difficult to remove, i'd recommend a puller. Once you the get cowl off, you can follow the hose to the brake booster. One of the most difficult things was getting the hose in the rubber grommet in the booster. You really need hands the size of a 10 year old with the strength of a grown man. One last thing, if you're not a contributing member, become one and start ordering parts from Sunset through the Renntech site. On this hose alone I saved probably 50% of what you'll find from the other Porsche parts websites. I've saved tons of money over the last couple of years. I get parts cheaper than my mechanic. Typically, you're not going to get them overnight unless they're in stock, but if you don't need them quick, this is absolutely the best place to go.
Thanks, Loren. I'll break down and drop my Porsche mechanic next week!