2016-2017 Cayenne GTS Loss of Power
#106
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I'm happy to say that my dealer zeroed in on ATI 1704 -- "oversensitive knock detection causes inability for cruise control to hold speed and loss of boost in cayenne s/gts"
Information: "The oversensitive knock detection slows down the timing and cuts turbo boost when no actual knock is present. Updated DME software has been developed to desensitize this knock detection and resolve the corresponding issues."
Information: "The oversensitive knock detection slows down the timing and cuts turbo boost when no actual knock is present. Updated DME software has been developed to desensitize this knock detection and resolve the corresponding issues."
I'll have to chat with my local service manager about the fix.
#107
Instructor
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Now the Panamera briefly having a version of this engine I never could find posts about it having the issue, but really could not find too many posts from owners of those cars period.
#108
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Had the software updates installed today. The dealer never questioned the issue. He asked right up front was the loss of power while using cruise control which it was. An hour later I was on my way. Have to say initial drive the acceleration was much smoother and overall feel was better. Need to have more time before any conclusions. The loss of power hadn't happened for some time since we live in flat country. The Service writer did mention some thing about false cylinder 3 misfire error setting off the knock detector.
#109
Instructor
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Had the software updates installed today. The dealer never questioned the issue. He asked right up front was the loss of power while using cruise control which it was. An hour later I was on my way. Have to say initial drive the acceleration was much smoother and overall feel was better. Need to have more time before any conclusions. The loss of power hadn't happened for some time since we live in flat country. The Service writer did mention some thing about false cylinder 3 misfire error setting off the knock detector.
#110
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My average fuel economy is 15.8 mpg. I drive about 70-100 miles per day, 80% highway.
#111
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Mileage has been good for this car. Over the past 3000 miles about 21. Yesterday we put on 120 miles mostly rural 4 lane and interstate. Average speed according to computer was 63 with 23 mph. I have verify the computer has good accuracy. Been very pleased with the mileage. Hopefully there isn't a negative affect with the code.
#112
Instructor
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Through all those I had many all freeway trips, a few even at the speed limit or no more than 5 over the limit, most of those were 17 to 18 mpg. My wife might take it to San Antonio and back this week, she drives like a grand mother but has used the SUV for that trip before and still not even got 19 out of it. Will be interesting to see if perhaps it does much better for her this time around.
#113
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Sadly, my new to me GTS is exhibiting these same symptoms. I drove from Houston to Lafayette and while driving through town, I noticed the lack of power while trying to accelerate. The boost gauge confirmed it.
After the engine has a chance to get hot for an extended period it does not want to build any boost unless I floor it.
Nov 15 build date.
Can an anyone confirm the fix? This is a CPO I have had less than a week. I almost want to ask for my diesel back.
After the engine has a chance to get hot for an extended period it does not want to build any boost unless I floor it.
Nov 15 build date.
Can an anyone confirm the fix? This is a CPO I have had less than a week. I almost want to ask for my diesel back.
#114
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I would suggest going to your dealer and have them install the fix identified in this thread. Until it's proven otherwise I would say Porsche has found the cause and provided the solution. My dealer was on top of this and it took about an hour. Just the right amount of time to have coffee and walk through the show room.
#115
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I would suggest going to your dealer and have them install the fix identified in this thread. Until it's proven otherwise I would say Porsche has found the cause and provided the solution. My dealer was on top of this and it took about an hour. Just the right amount of time to have coffee and walk through the show room.
I am going in on Monday to have it reflashed and have a key added to the car. It was only delivered with one.
I will update after my next road trip which should be end of next week if not sooner.
#116
Pro
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Thanks for the reply. I already spoke to the service writer and sent him a video I made showing the no boost, and also sent him the updated DME number and info. He spoke to the service manager and he was also aware of the fix.
I am going in on Monday to have it reflashed and have a key added to the car. It was only delivered with one.
I will update after my next road trip which should be end of next week if not sooner.
I am going in on Monday to have it reflashed and have a key added to the car. It was only delivered with one.
I will update after my next road trip which should be end of next week if not sooner.
#117
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I don't want to waste my time (again) trying to describe/demonstrate that which I cannot reliably repeat.
I checked the VIN on the Porsche website and no recalls are listed for it. But I gather this isn't a recall, correct?
#118
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I called my dealer this morning and was informed there's nothing out for my VIN. I've had mixed feelings when speaking with this particular service manager, so I'm not sure as to whether this is accurate or not.
I don't want to waste my time (again) trying to describe/demonstrate that which I cannot reliably repeat.
I checked the VIN on the Porsche website and no recalls are listed for it. But I gather this isn't a recall, correct?
I don't want to waste my time (again) trying to describe/demonstrate that which I cannot reliably repeat.
I checked the VIN on the Porsche website and no recalls are listed for it. But I gather this isn't a recall, correct?
I went and had mine updated today. We will see how it goes. Good luck!
#119
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I have put on over 300 miles since the update. Includes city, rural highway and interstate. Normal acceleration is much smoother and more in line with what I would expect. Been no indication of boost loss at any time. I did a blast from 0 to 100 mph on a country road that was very smooth. I know this was for the loss of boost so maybe a reset occurred during the install clearing out the ECU but regardless the overall result so far has been great.
#120
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Headed to the dealer this AM. Talked with Porsche USA just now and they don't show anything related to my VIN. But the rep on the phone 'had heard of' the cruise control issue, but did not have resources at her disposal to confirm/deny that was relevant to my particular vehicle.
If this were repeatable I'd gladly do whatever it takes to demonstrate it, but it's random and infrequent... but often enough to be repeatedly annoying.
If this were repeatable I'd gladly do whatever it takes to demonstrate it, but it's random and infrequent... but often enough to be repeatedly annoying.