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bgist
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PSM Issues
bgist replied to 955_turbo's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
I thought I'd offer my $0.02 as well. This has led to the following parts having been replaced (under CPO warranty): PRC: 955-618-025-03 (Control Unit Trans) 348.63 955-624-601-01 (Servo Motor) 435.29 (3x each) DMG code: 39780400002 Plus a number of times that I've been to the dealer (under CPO warranty) and they say there is no fault, and nothing wrong. (10+ times, 3 dealerships). This has been going on consistantly since I purchased the car in 2008. The warranty expired last month, and its started again. Literally less than 30 days after the warranty expired. Wish me luck. -
Quick follow-up question on this - any reason that - after these faults come up (AWD/PSM) that I should see an astronomical improvement in gas mileage? My normal is 16-17mpg, and my best ever was 20.5 ... right after these faults came on, I topped 22. (2004 Cayenne-S)
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PSM Issues
bgist replied to 955_turbo's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)
I'm wondering if there was any follow-up on this particular problem. I'm having exactly the same problem with my 04 Cayenne S - but the dealer(s) have told me that its not throwing any fault codes, and without a fault code, they have no idea where to go. I can't imagine that I have experienced a full engine shutdown, and had the PSM light (and the 4wd warning) lights flashing a dozen times without throwing a single code, but multiple dealers have told me this, and I have no ODBII/PWIS to corroborate their story. I'm just worried about an upcoming Christmas driving trip I have planned .. I can't think of a better way to spend the holidays with my family than on the side of the road, waiting for roadside assist to arrive.