raymort

If you have a lemon claim, the buyback follows a formula. Very doubtful that value would be 20k less than the market value. Was it the dealer making the offer or PCNA?

ctguy

Ugh so I picked up a 5x8 U-Haul cargo trailer yesterday.

Today I drove downtown (unhitched) and saw this the ACC error for the first time. And I just realized how much I rely on it.

Especially so for road trips. I'm planning an 8 hr drive to the FL keys this weekend and can't imagine being without it to reduce fatigue at the wheel.

Ugh so I picked up a 5x8 U-Haul cargo trailer yesterday.

Today I drove downtown (unhitched) and saw this the ACC error for the first time. And I just realized how much I rely on it.

Especially so for road trips. I'm planning an 8 hr drive to the FL keys this weekend and can't imagine being without it to reduce fatigue at the wheel.

Reading others forums members dealer experience not giving me much hope. Has there been any newer fixes or updates?

justabout

Get a bunch of folks together and send a letter to PCNA that requests a refund for the cost of the option and have them convert the cruise control back to non ACC mode.

If they see enough complaints, it should get their attention. To this point, they don’t seem concerned.

Woofman

Did Porsche ever deploy the software update mentioned in the service bulletin that @Schnave provided in post #10? If so, has your Cayenne received this software update? I assume that the Porsche dealership would be able to tell by reviewing your vehicle history.

Is it possible to revert to non-adaptive cruise control when ACC on a Porsche fails? That's easy to do on some brands (e.g. Toyota, Lexus) but I've not seen a procedure for Porsche.

PorscheACC

I have that random ACC issue since brand new and is kind of often and for no reason, most of the time it resets after restarting the engine..

My latest thought is that something overheats and shuts down, more when there is a lot of traffic around and is activated a lot.

Porsche dealer warranty is worthless once the vehicle is bought.. and, if you don't have warranty anymore, they will be happy to charge you 10's of hours for labor and still find nothing..

ctguy

Yeah ! So of course it's back to normal again now 😆. Random indeed

MaxLTV

My ACC stops working even with an empty bike rack on air suspension, so with absolutely no squat. I think it might be because the rack is blocking some sensors.

PorscheACC

As a matter of fact, I had the ACC warning popup today while going to lunch with my wife.. After lunch, and starting the engine again, the error was gone.

It is a sunny hot day, no rain, no towing, nothing.. It just poped up, and it can be weeks before the next one or days..

Almost 100,000 miles put on my 2019 Cayenne S, and I had that same ACC warning popup, when I first bought my brand new Cayenne S in Florida, and drove back to Houston for the first time.

It seems to happen more often when it is hot and driving in heavier traffic.

Kendo67

Had this pop up on my Coupe last weekend , whilst chauffeuring the wife and two of her friends from the pub.

Never gave it much thought until this post , there are two possible solutions :

Re-calibrate the sensor or wifey can get lighter friends.

K

PorscheACC

Choose your words wisely while explaining your wife about the ACC issue and her friends.. She can go from wifey to wolfey before you can blink once.. :-)

Though, the Cayenne is a good place to sleep for a couple of nights.. Though, Porsche should add better accessories for those random misspoken cases..