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Has anybody encountered situations where the PDK won’t upshift or downshift out of a certain gear at all? This happened three times today.
Two times I was in 5th gear approaching a turn and the car wouldn’t downshift even after coming to a complete stop. I put the car in Park and shifted back to Drive and was immediately in 5th gear at 0 mph.
The other time was on a cold start and I reversed out of my garage, left my house and the car wouldn’t change out of 2nd gear even after a stop or giving it more gas.
In both cases the paddle shifters wouldn’t change the gear, going to Park and then Drive put me in the gear it was previously stuck in, and only restarting the engine solved the problem.
The kicker is I get ZERO errors on the dash. Probably making it difficult to diagnose. Luckily I caught 2 out of the 3 times on video so off to the dealer and my car is still under CPO so hopefully there’s a resolution.
I did find a thread on another forum saying their 991 was on the highway and wouldn’t get out of 7th gear. Mentioned it’s either the distance sensor or a full PDK replacement. But I haven’t found many other cases on the 992.
Has anybody encountered situations where the PDK won’t upshift or downshift out of a certain gear at all? This happened three times today.
Two times I was in 5th gear approaching a turn and the car wouldn’t downshift even after coming to a complete stop. I put the car in Park and shifted back to Drive and was immediately in 5th gear at 0 mph.
The other time was on a cold start and I reversed out of my garage, left my house and the car wouldn’t change out of 2nd gear even after a stop or giving it more gas.
In both cases the paddle shifters wouldn’t change the gear, going to Park and then Drive put me in the gear it was previously stuck in, and only restarting the engine solved the problem.
The kicker is I get ZERO errors on the dash. Probably making it difficult to diagnose. Luckily I caught 2 out of the 3 times on video so off to the dealer and my car is still under CPO so hopefully there’s a resolution.
I did find a thread on another forum saying their 991 was on the highway and wouldn’t get out of 7th gear. Mentioned it’s either the distance sensor or a full PDK replacement. But I haven’t found many other cases on the 992.
There could be a number of reasons...
First of all is the CEL on or does it blink when you shift? If so codes are generated Also there is the engine protection logic that may be preventing up or down shifts and that will throw a code too. Codes can easily be read with an OBD tool specific to Porsche
Multiple sensors interact with the PDK and if one of those sensors gives inconsistent data the transmission controller may lock out shifting to prevent damage.
I think it is called the mecatronic unit which is essentially the brain of the PDK that is refusing up or down shifts. That may also be getting inconsistent sensor signals so it prevents up or down changes.
Transmission PDK fluid may be old or low or overheating
And if I recall correctly Porsche about two years ago issued upgrades for PDK modules...you could check that to see if your car falls into that category
In any case your car needs to get into service and I wouldn't wait to long to do that.
How many miles on the car and has either of the PDK fluids been checked or changed?
It’s at 29.8k miles. I actually had the 6 year service scheduled for this week, which the maintenance booklet mentions to check/change the PDK fluid. Though my Indy said I could go longer without changing it. Regardless, it’ll be sent off to the dealer first.
First of all is the CEL on or does it blink when you shift? If so codes are generated Also there is the engine protection logic that may be preventing up or down shifts and that will throw a code too. Codes can easily be read with an OBD tool specific to Porsche
Multiple sensors interact with the PDK and if one of those sensors gives inconsistent data the transmission controller may lock out shifting to prevent damage.
I think it is called the mecatronic unit which is essentially the brain of the PDK that is refusing up or down shifts. That may also be getting inconsistent sensor signals so it prevents up or down changes.
Transmission PDK fluid may be old or low or overheating
And if I recall correctly Porsche about two years ago issued upgrades for PDK modules...you could check that to see if your car falls into that category
In any case your car needs to get into service and I wouldn't wait to long to do that.
Thanks for the breakdown! Unfortunately no CEL or any indication something is wrong which I think is very odd. I’d expect something. I didn’t even notice I was stuck in 5th gear until I started accelerating from a stop and I wouldn’t budge.
In fact the car was actually at the dealer just 3 days ago because they replaced a leaky CV boot under my CPO, they also performed some recall checks one being the turbocharger and a battery sensor upgrade. I’d guess that PDK module upgrade would have been taken care of as I’ve only had this car for 1.5 years.
Hoping to drop it off Monday when they open, but I’m worried without any codes and possibility of not being able to recreate it, I’d be sent on my way. Only evidence I have is videos of it happening on two different times. Maybe I’ll have them take the turn to my neighborhood since it got stuck there in 5th gear twice
It’s at 29.8k miles. I actually had the 6 year service scheduled for this week, which the maintenance booklet mentions to check/change the PDK fluid. Though my Indy said I could go longer without changing it. Regardless, it’ll be sent off to the dealer first.
So at six years, you need to change the PDK clutch oil.......NOT the PDK fluid. They are not the same thing. You also need to replace the AWD controller oil. Look at the maintaince schedule,, it's all listed. If you're on the original battery.......you should get a new one. Correct PDK and such are very dependent on battery condition.
So at six years, you need to change the PDK clutch oil.......NOT the PDK fluid. They are not the same thing. You also need to replace the AWD controller oil. Look at the maintaince schedule,, it's all listed. If you're on the original battery.......you should get a new one. Correct PDK and such are very dependent on battery condition.
Right apologies, I meant the clutch fluid. I sent that same maintenance booklet to my Indy and mentioned the “PDK transmission: change clutch fluid” which is the text in the booklet.
I am planning on replacing the battery soon..during the dealer visit last week they performed a battery health check and all was good, so I was going to delay that for short while longer. The car gets driven daily so I’d expect a good lifespan of the lithium battery. Replacing it is on my radar nonetheless
A battery can fail pretty quickly. If you have RAS you might need the li ion battery and even Porsche says after 6 years replace it. It’s pricy and hard to get so you switch over to AGM with the right coding. I never wait for a battery to fail, cause who the hell knows where you might be when it does.
I started the car this afternoon and I finally got an error on the dash and a CEL. Transmission error Reverse gear not available. Also found another rennlist thread with the same error so that's sounding like it’ll be a PDK replacement. Looks like it’s now a tow to the dealer.
Thanks for the breakdown! Unfortunately no CEL or any indication something is wrong which I think is very odd. I’d expect something. I didn’t even notice I was stuck in 5th gear until I started accelerating from a stop and I wouldn’t budge.
In fact the car was actually at the dealer just 3 days ago because they replaced a leaky CV boot under my CPO, they also performed some recall checks one being the turbocharger and a battery sensor upgrade. I’d guess that PDK module upgrade would have been taken care of as I’ve only had this car for 1.5 years.
Hoping to drop it off Monday when they open, but I’m worried without any codes and possibility of not being able to recreate it, I’d be sent on my way. Only evidence I have is videos of it happening on two different times. Maybe I’ll have them take the turn to my neighborhood since it got stuck there in 5th gear twice
I know how frustrating a problem like this can be. Have been there more times than I can remember. I'd lay odds that codes have been thrown that will point to the issue. PDK is relatively robust component and can react funny either to very minor issues like fluid levels or sensor failure. Your'e doing the right thing getting her into the shop and let them have at it...
I started the car this afternoon and I finally got an error on the dash and a CEL. Transmission error Reverse gear not available. Also found another rennlist thread with the same error so that's sounding like it’ll be a PDK replacement. Looks like it’s now a tow to the dealer.
Well...at least now it's showing some kind of dash warning...so the tech will be able to determine the exact trouble codes being triggered.
A PDK is a pretty robust unit...but unfortunately there are a few internal sensors that interact with various control modules to control its operation.
Last I checked, Porsche techs are still not replacing internal PDK parts...so if a valve body or internal sensor is faulty and needs replacing, most likely the entire unit will be replaced.
Its good you have that warranty...pretty costly if paying out of pocket...a replacement PDK alone is around $20K!
Its good you have that warranty...pretty costly if paying out of pocket...a replacement PDK alone is around $20K!
Good luck!
You are right, it’s a good thing the OP has a CPO warranty but I find it hard to believe you can replace a pdk unit for $20,000. A door handle on my 2021 Cayenne was $1,200.00.
You are right, it’s a good thing the OP has a CPO warranty but I find it hard to believe you can replace a pdk unit for $20,000. A door handle on my 2021 Cayenne was $1,200.00.
9G1-300-011-MX
Today's pricing is around $21K over the counter... some dealers are offering these on sale with a $5K discount...so they could be bought in a range from $15K-$18K
It's still an 8–10-hour labor rated job through a dealer...so you'll need to include the additional $3-$4K for labor and misc. parts. Still not an inexpensive job, even if you can get the PDK without any mark-up.
You’re lucky that you’re under warranty. If you weren’t under warranty, definitely worth going the repair route with an independent shop. There are several of them across the country now that will take apart/rebuild the transmission and address sensor related issues.
Search on RennList and you will find shops that will rebuild a PDK.
It should be noted that the overwhelming majority of PDK issue are electronics related. Mechanical failures are exceptionally rare. That said, you can damage things driving the car when it tells you not to.
Today's pricing is around $21K over the counter... some dealers are offering these on sale with a $5K discount...so they could be bought in a range from $15K-$18K
It's still an 8–10-hour labor rated job through a dealer...so you'll need to include the additional $3-$4K for labor and misc. parts. Still not an inexpensive job, even if you can get the PDK without any mark-up.
Hefty core charge if the case is damaged as well.
Compared to this, I feel like the door handle is a rip off.
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