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I have a 2017 Macan GTS with 36,000 miles, regularly serviced at local Porsche dealer and have had no issues with anything until last week. While driving to work last Wednesday, two warning messages appeared. First said "Transm. Fault, Poss no R gear, Drive on possible". Second message said "Engine control fault, Consult dealer, Driving permitted". Macan started shifting erratically and would only shift in 2nd, 4th and 6th gears. I drove to work at 50 mph and called dealer and they told me to drop it off on way home.


I dropped the Macan off after work and the dealer put me in a brand new 2019 Macan base loaner. The next day the dealer informed me that one of the solenoids on the transmission valve body (also called mechatronic unit) was stuck in the 5th gear position and it caused the erratic transmission behavior and the warning messages. The dealer was waiting for the mechanics diagnostic report and warranty approval. Porsche authorized a new PDK transmission valve body which has electrical and hydraulic components built into it. (photo attached, weighs 35 lbs. per my mechanic) My advisor told me the part alone is $900 plus 3-4 hours of labor.


The dealer called me Friday at noon and said that my Macan was ready! The dealer had these parts in stock, which may indicate this is more of a common issue. Repair also included new PDK fluid which normally gets replaced at 40,000 mile service.
Luckily I was under warranty and did not cost me anything. So far the Macan is riding fine. My mechanic said it will feel like a new transmission and the car will need to learn my driving habits all over again. Shifting is super smooth. Hope this is the end of this issue, scared the heck out of me.


BTW, I was very impressed with the Macan base loaner with 18" wheels. The new PCM screen is nice but noticed the font and touchscreen icons were small and wasn't so user-friendly. Not sure if these can be adjusted...
 

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The dealer had these parts in stock, which may indicate this is more of a common issue. Repair also included new PDK fluid which normally gets replaced at 40,000 mile service.
Luckily I was under warranty and did not cost me anything. So far the Macan is riding fine. My mechanic said it will feel like a new transmission and the car will need to learn my driving habits all over again. Shifting is super smooth. Hope this is the end of this issue, scared the heck out of me.
Good news there that they fixed it quickly and you were under warranty! My transfer case on my '16 S had to be replaced in May two months after my purchase with just over 30k miles. If I hadn't purchased certified preowned I would have been out some significant $$$.
 

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Makes me think that I may want to buy an extended warranty before the 50K miles comes up.
This repair was close to $1500 and heard if the PDK transmission has to be replaced, it could cost 10-15K:( I love the brand and my Macan GTS and realize the price of admission is high, expensive to maintain but worth it IMO...There is no substitute!
 

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Makes me think that I may want to buy an extended warranty before the 50K miles comes up....
Very common thought.

But if you actually ran the #s , it probable would not be worth it to pay thousands for Extended warranty, in case a rare, expensive repair was needed out of warranty.

You will always hear of those who are so happy that they bought the 3k or 7k extended warranty, bc they had to fix the timing cover oil leak or replaced transfer case.

How do I know this, when you cannot accurately "run the #s " since Porsche does not divulge the number of timing cover oil leaks or transfer case replacements? Is it 1%, 5% or 20%? Could it be even higher, once the cars get to be 5, 7, 10 years old?

I do not know for certain. But, these warranty companies & Porsche are not about to lose $ selling these warranties. They are also not doing it to break even.

Most car owners are NOT on these forums. Happy owners with little to no problems are not as motivated to seek out troubleshooting forums or to vent online as are owners with problem cars.

I also will not buy lottery tickets even though there are people who win even a few hundred or thousand & say: "See?! I was RIGHT to buy a lottery ticket per week these past 3 years! I am ahead by a lot! You, who said it was a stupid waste of $, were WRONG!"
 
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Knock on wood but I have refused to buy warranty.

Think about it... the business is out to make money, not to do good will and spread joy. If warranty actually saved customers money the business would be losing money.
 

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No different than any other type of insurance. Most people who own a house will purchase a homeowners policy in case the house burns down, among other perils.

Chances are almost certain the premiums you pay are going to be more than what you collect from claims against the policy.

Given that, I rarely buy any type of insurance except when there is a risk of a substantial financial loss, because usually you are better off "self insuring" if you can absorb the worst case scenario without significant financial stress.

I work for a Fortune 500 company, and that's why our health insurance is self insured. We merely hire a third party (in our case, Aetna) to administer the plans and claims. But we fund the payment of the claims ourself. Of course we are better off using an insurance company like Aetna versus trying to adminstrate ourselves because of the tremendous purchasing power a company like Aetna has in the provider marketplace.
 

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Good you got it fixed so quickly, that would really scare me (even if the car is under warranty, I hate this kind of mechanical problems).

By the way the part in the photo looks like it comes from some space shuttle, it's beastly!
 

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No different than any other type of insurance. Most people who own a house will purchase a homeowners policy in case the house burns down, among other perils.

Chances are almost certain the premiums you pay are going to be more than what you collect from claims against the policy.

Given that, I rarely buy any type of insurance except when there is a risk of a substantial financial loss, because usually you are better off "self insuring" if you can absorb the worst case scenario without significant financial stress.

I work for a Fortune 500 company, and that's why our health insurance is self insured. We merely hire a third party (in our case, Aetna) to administer the plans and claims. But we fund the payment of the claims ourself. Of course we are better off using an insurance company like Aetna versus trying to adminstrate ourselves because of the tremendous purchasing power a company like Aetna has in the provider marketplace.
I think you nailed it. Unless in the off chance that it happens and you need to spend your life saving towards it, you are most likely better off spending that money when you NEED to.

I bought dent, tire, and extended warranty (not on the car) before.

The only thing i ever used was the tire warranty, once, which doesn't even cover the original cost.

And the worst thing is, you usually have to fight for what's covered and what's not with any sort of claims. At which point, I rather just pay the cost as needed and not deal with it.
 

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I’m glad it turned out well for you.
I had my PDK replaced awhile back. It was out of warranty, but Porsche covered it with a good will repair since the leak at the right half shaft was identified before my warranty expired.
Also of note, my extended warranty company refused to cover it since it was identified as a pre existing condition.
 

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Hi I'm Leyth new to the form, I got a pre owned 2015 Porsche Macan S with PDK Transmission 2 years ago with about 100,000Km on the dash.
All service history was available, and the car run fine with all the features.
I run into a leak in one of the radiator hoses, when took the car to my local garage, as its it not under warranty any more, and unfortunately we have one Porsche dealer in the country, which makes it a bit expensive to have them do the repairs.
The local garage which has experience with Porsches has noticed ware in the engine gaskets and other consumables items and advised me to change them, as I agreed, he also added that as I'm at about 130,000km on the dash it would be better to change the PDK Transmission Fluid.
I got all genuine Porsche parts including the PDK Fluid, he did all replacements and changed the PDK Fluid.
I got the car back drove it for about 150km and got a message saying to fill up the engine oil, so I did and spoke to the mechanic about it, and was asked to get the car back to him in couple of days, and just refill the oil as it requests it.
I kept the driving to a minimum, once I took the car to fill the engine oil I get engine lights "yellow" came on with these two faults both yellow:
1.) Transm. Fault poss. No R gear drive on poss. " 2nd, 3rd, 6th, R available"
2.) Fault engine control possible to drive on.

Meaning the car went into Limp Mode, as I turned the car off and on the fault magically disappeared, as soon as I was on my way to the garage turned the car off before the journey as I turned it on get the fault again.
Told the mechanic about the issue he said we will check it, got a call a couple of days later from him, saying the the leaks have been repaired, but nothing he could do about the Transmission as he doesn't have good knowledge in the PDK transmission.
So drove the car for a couple of days trying to figure out what could the issue be, so I noticed as the engine oil goes above 110c and I turn the car off and on the fault would disappear, whenever the temp is under 110c the fault presets. "I actually couldn't get the fault to go away anymore as the engine temps don't go above 100c now as the weather is starting to cool down".
Got an OBD reader, used it and got these error codes: p0778 which leads to a Pressure Control Solenoid, and P0700 which leads to a Transmission Control System Malfunction.

Note: the gears don't feel clunky or lagy and the changes are smooth, I don't feel any issues with the clutches.

I did some research on the error code and it could be 1 out of 5 things technically from a faulty senser to a faulty Transmission.
But I have a theory, after I did investigate with the mechanic I felt a hesitation in his voice when I asked if he recalibrated the transmission after the fluid change "I don't think he did it".
So my theory is if I recalibrate the PDK flush all the faults will the issue go away, or reset the PDK somehow so it can recalibrate.

Any ideas any one faced this issue or something similar.
 

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My mechanic said it will feel like a new transmission and the car will need to learn my driving habits all over again.
I’m glad it all worked out. I was curious about this last part, are you suggesting that the PDK software learns the driver’s style and adjust shifting accordingly?
 

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I’m glad it all worked out. I was curious about this last part, are you suggesting that the PDK software learns the driver’s style and adjust shifting accordingly?
Most TCU's put into service in the last decade are adaptive to driver habits, this is nothing new or unique to Porsche.
 
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