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Warning "Gearbox fault - Possible no R-gear. Drive on possible."

302K views 517 replies 173 participants last post by  whiteporschemacans  
#13 · (Edited by Moderator)
Hello,

The multi-function display in my Turbo displays the warning:
Gearbox fault possible no R-gear Possible to drive on

Working only 1-3-5-7 gear, the reverse gear does not function.

Did anyone have the same 'adventure'?

---
Unfortunately, my warranty was finished 2 months ago.
 
#479 ·
My 2015 Macan has only 50k miles, and so far in 2023 the dash warning lights have gotten me to spend $1800 for an emissions fix which lasted 700 miles before I had to replace the Valve body for $6000. Then less than 300 miles later, the car dies again and Porsche Carlsbad and San Diego are telling me I need a new transmission for over $27k.

Of course, that is more than the car is worth, but Porsche offers no other solution. How screwed am I?
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#480 ·
Grand opening. Grand closing. Purchased a 2015 Macan Turbo with 85k from Copart/AutoBidMaster. CarFax looked good with service by Porsche Plano and Porsche Austin, but I should have looked closer. Turns out the dreaded faults popped up after I drove it 3 miles. One owner had an Indie replaced the mechatronics in May 2023 and then sent it to Porsche Austin to update. It worked for 40 miles then failed. Porsche wouldn't release more parts to the Indie so the owner sold it to a guy that runs an auto repair shop. This shady character tried to sell it online (from a lot) but after several months he gave up and sent it to Copart for the next sucker (me). I have his name and shop but can't seem to get anyone to answer the phone at Porsche Austin to confirm. Porsche Greensboro quoted 24899 + tax for a remanufactured tranny. My first and last Porsche . . . okay maybe.
 
#482 · (Edited)
The first troubleshooting step is to get the stored trouble-codes (DTCs) from the Transmission Control Computer (aka "TCU" or "Tiptronic Transmission Control Module"). PWIS and other Porsche capable scan-tools often list the TCU as a "Tiptronic", even though it is really a Dual-Clutch/DSG/PDK/S-Tronic transmission. The "Tiptronic" name is what Audi calls a conventional torque converter automatic transmission with electronic control and manual shifting features, and the scan-tools just used the wrong marketing name for it.

You could try pulling the Mechatronics out and just replacing the two "Circuit Boards", cheapest thing to try.
Audi B8/B8.5 S4 Quattro 3.0T Drivetrain DSG Transmission - 0B5398009F - Mechatronics Repair Kit 0B5398009F (0B5 398 009 F) (ecstuning.com)
Another forum member had issues only when the transmission warmed-up. It was fixed with new "circuit boards", which also contain the temperature sensor for the clutch fluid, and an RPM sensor.
There are many of these circuit board repair kits available on Ebay and Amazon. Some are much cheaper than the "real" VW/Audi kit, but they may work fine....

The next more expensive fix is to get a new or rebuilt Mechatronics unit (just the valve body part, not with a new TCU), and install the original TCU onto the new valve body. Then, no TCU programming is needed (to write the VIN into it (needed for the immobilizer).
But, you will need to run the full Mechatronics adaptations/calibration with your PIWIS.

Valve body (mechatronics) without electronic control unit, automatic transmission 0B5 (DL501) 0B5325025T 0B5325031N regenerated (maktrans.net)
 
#484 ·
I got this “no R-gear” message at mile 64 and less than 48 hrs of ownership of my new ‘24 S! This happened while driving down the highway and the car just seemed to disengage from the gear. The forward gears no longer engaged when I put it in drive, though I could still reverse.

Towed to the dealer, they were shocked and apologetic.. today they said they are going to replace the PDK control unit and recalibrate.. hopefully this is enough?!


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#485 ·
Looks like I am joining the party too! I just had:

ABS/PSM loss possible to drive on
Gearbox loss Park vehicle safely

Codes are:
P150E00 Vehicle speed signal - implausible for ABS Control
011F03 Rear right speed sensor, sensor fault
P0700 Permanent Control System (MIL Request)
05228D Check DME fault memory content
U0159 Communication with Park/Assist
P2162 Vehicle Speed Sensor "A"/"B" Correlation


All are taken from a POR 2.0 computer.

Car is a 2015 Macan Turbo.

Transmission fluid filters and flush done <2,000 miles ago with OEM equipment. No slipping or issues have ever been present. Running a pedal commander with Sport -2 mode on.

I am looking for tips here and on Rennlist on what I should be ordering to fix the issue/s.

- Blighty
 
#487 ·
Update, this was the exact issue! They would not honor my warranty with the car being built in April 2014. I bought the rear right sensor straight from Porsche Charleston and fitted it in 10 mins. No more issues. Thanks to this great community.

Blighty
 
#489 ·
I have a 2015 Certified Preowned (CPO) Porsche Macan S that I bought at my local Porsche dealership. I take care of the car and it is garaged on a daily basis with regular interval Mobil 1 fully synthetic oil. I really love the Porsche brand and how sporty and luxurious their vehicles are and would consider another Porsche in the future.

The problem that I have now is that the "Fault Of The Engine Control Unit. Gearbox fault possible no R-gear Possible to drive on." light came on and it is the second time this type of check engine light has come lit up. The first time I believe my local Porsche dealership mechanics might have done some repairs and updated the software

This time I seem to have Coolant sprayed or leaked all over the engine bay along with the light and this came out of nowhere. I have only driven my Macan for less then 15,000 miles in the 6 years of ownership and is surprised by the quality of the build. I really expected better for such a top tier luxury brand and at that price point.

My regular car warranty is expired and the Certified preowned warranty has expired. I believe there was an extension for the pandemic and that expired too. I have no clue where to start and would hope that Porsche can help with this situation. Thank you for any help as my car is sitting there and I am unable to drive it since it wont go pass 2nd or 3rd gear and there is no reverse. It is quite disheartening and I have driven other luxury brands such as Mercedes, Acura, Lexus and more without major issues such as this that rendered my car immobilized.

Thank you in advance for any help or guidance. I know that there are quite a few similar posts on the forum but I am just not sure who to trust to fix the issue other then Porsche. It would be nice if they provided some kind of recall fix or goodwill gesture. Would a coolant leak from a defective hose or valve or thermostat or water pump or radiator or T pipe cause the ecu on the engine to create a fail safe fault so it doesn't drive forward or let you reverse?

I've already tried contacting Porsche NA through the owner's inbox message and website email link and on X. No response at all maybe I should call them. I am in New York and if any recommendations on trustable repair shop it would be most kindly welcomed. Thanks for any advice and suggestions.
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#494 ·
I have a 2015 Certified Preowned (CPO) Porsche Macan S that I bought at my local Porsche dealership. I take care of the car and it is garaged on a daily basis with regular interval Mobil 1 fully synthetic oil. I really love the Porsche brand and how sporty and luxurious their vehicles are and would consider another Porsche in the future.

The problem that I have now is that the "Fault Of The Engine Control Unit. Gearbox fault possible no R-gear Possible to drive on." light came on and it is the second time this type of check engine light has come lit up. The first time I believe my local Porsche dealership mechanics might have done some repairs and updated the software

This time I seem to have Coolant sprayed or leaked all over the engine bay along with the light and this came out of nowhere. I have only driven my Macan for less then 15,000 miles in the 6 years of ownership and is surprised by the quality of the build. I really expected better for such a top tier luxury brand and at that price point.

My regular car warranty is expired and the Certified preowned warranty has expired. I believe there was an extension for the pandemic and that expired too. I have no clue where to start and would hope that Porsche can help with this situation. Thank you for any help as my car is sitting there and I am unable to drive it since it wont go pass 2nd or 3rd gear and there is no reverse. It is quite disheartening and I have driven other luxury brands such as Mercedes, Acura, Lexus and more without major issues such as this that rendered my car immobilized.

Thank you in advance for any help or guidance. I know that there are quite a few similar posts on the forum but I am just not sure who to trust to fix the issue other then Porsche. It would be nice if they provided some kind of recall fix or goodwill gesture. Would a coolant leak from a defective hose or valve or thermostat or water pump or radiator or T pipe cause the ecu on the engine to create a fail safe fault so it doesn't drive forward or let you reverse?

I've already tried contacting Porsche NA through the owner's inbox message and website email link and on X. No response at all maybe I should call them. I am in New York and if any recommendations on trustable repair shop it would be most kindly welcomed. Thanks for any advice and suggestions. View attachment 285564 View attachment 285561 View attachment 285562 View attachment 285561 View attachment 285562 View attachment 285563 View attachment 285564
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I had this EXACT issue. Happened in January and it took me until two weeks ago to even accept that my car needed a new Mechatronic. Set me back $5K. My car is a 2016 and I've had nothing but problem after problem. I finally accepted that I had to dish out for a new Mechatronic. It's apparently a well-known/frequent problem with the 2015/2016 models. Porsche will usually blame drivers if service hasn't been done at the dealership. Highly recommend you take it to them if you've been servicing it through Porsche and let them explain it to you.

So frustrating. I finally treated myself to a "quality", German brand only to be tormented by problem after problem. Breaking my heart but finally decided to put her up for sale in the next week or so.
 
#492 · (Edited)
Two common points of coolant loss are the expansion tank and the coolant pipe under the manifold. There are threads with some info in both of these here.

There’s also a thread about transmission issues. Without a code reader that can read Porsche specific codes, it’s hard to know what the problem is. Likely a problem with the mechatronic though.

Since you are out of warranty, I’d find a good independent Porsche shop to take a look at these things. If you can’t find that, an Audi shop should be able to help since the transmission is the same as the Audi 7-speed DSG. That said, many shops will not touch the internals of the transmission, so you may have to try a few.
 
#493 ·
Thank you for the advice and suggestions. I will do more searching on the forum as recommended. I will try to scan the car later and see if I can provide some codes. I think I remember doing a search for recommended independant Porsche Shops maybe I can search for some Audi ones too since they share a good amount of components. I hope it is just a sensor that an be replaced and that will resolve the matter. Thanks again
 
#495 ·
Wow that is crazy and yes I agree with you I thought I finally treated myself to a "Quality" German car but didn't expect it would end up being problem after problem. That mechantronic part from what I googled seems to be around $1800 plus for just the part. I can't imagine how much Porsche charges for labor and the crazy part is I had this issue before but I am not sure what they replaced or repaired. I called Porsche NA they told me the dealership only warranty's the car repair parts for 2 years and that I am out of luck. I guess no point of dealing with the dealership for repairs or even purchasing a warranty. This is quite frustrating and unfortunate. Thank you so much for sharing your experience and I will research further and hope to find a qualified technician in NY to do the repairs.
 
#496 ·
I was able to lift the plastic engine cover and have been searching around for cracks or loose connections and probably will need to look again. The coolant that I refilled is all gone again and I don't see a puddle on the floor and have no clue where the coolant is leaking or spraying towards. To me it feels like everytime the heater or air conditoner is on there might be a slow leak somewhere but then again this time it was just a complete dump.

I called Porsche NA and they said that the dealerships only covers the serviced parts that they installed for 2 years and it has been 3 years so that is no go on their warranty. I have only put 2000 miles on the car in those 3 years and is surprised how fast anything can break. The gearbox issue was resolved during that time under warranty but they only offered 2 years from then so I just lucked out. Porsche NA was friendly but could not offer me any assistance. I guess I am on my own which is unfortunate but very grateful for all the help and responses on this forum. From my receipt this is what they serviced 3 years ago

1) ALA2 Campaign - Reworking Service Cover of Fuel Pump
2) WLA0 Campaign - Reprogramming DME Control
3) 9A7-325-025-01 - Slide Valve Gearbox
4) 9A7-321-371-00 - Gasket
5) PAF-013-827 - Seal Ring
6) Lens-Head Screw 6x20
7) Cover Front Removed and Reinstalled
8) ATF Inspected and Added

For the Transmission I believe they did the PDK service but made me pay for the oil and filter

1) 37302551 - Transmission Electronics Control Unit Programmed
2) 38775500 - Transmission Control Mechanism Replaced
3) 37021999 - PDK Fluid and Filter Replaced
4) 7x Transmission Oil
5) Filter Element

I was able to scan the car with a basic Autel Dongle that connects to the OBD and the codes I got were

1) 00A046 - Instrument Cluster - Warning:Coolant Level
2) 84040E - Rear End Electronics - Roof Control Unit, Interior Lighting Faulty
3) 89010E - Rear End Electronics - Alarm Siren, Faulty
4) P174E00 - Transmission Control - Valve 3 in Gear Train Half 2 - Electrical Fault
 
#497 ·
My 2016 Macan S transmission was replaced twice due to "Gearbox Fault Possible No R" message and it would not move forward or even Reverse. Car done over 51k km in total. I never did any launch control but I drive in Sport Mode all the time. I just got the car back from the dealer after second gearbox replacement, transmission ECU and transmission fluid cooler replaced. Hopefully no further problem.
Just curious, do you guys drive in Sport mode all the time, if not most time. I always drive with Start-Stop switch Off.
 
#498 ·
I drive in Sport Mode all the time and hope that doesn't cause a transmission to crap out like that. I don't use the start-stop option at all, I feel like it causes more wear on the engine. It still surprises me how expensive these repairs are and how they dont extend the warranty's on these transmission. Porsche NA wasn't able to help me and same with the dealership I bought my CPO macan from.
 
#500 ·
Check the Y Pipe all the down there with a flash light. I saw a big crack in the hose down there and that is quite possibly the usual issue with the coolant leak. If you are under warranty take it back to the dealership and show them pics of the cracked hoses. I feel that they dont usually do a thorough job inspecting like they should. There should be a work around that Y Pipe that other forum members have written up and there is also a Youtube video made by a popular DIYer on this forum also.
 
#501 · (Edited)
It appears that you've figured out the Y-pipe issue and that it's completely unrelated to the transmission problem.
@VAGfan lays out a course of repair to try on your transmission in post #482 above. I just bought my 13th Macan (a 2018 GTS) in the past 14 months (I have a dealer's license for my law firm and like to swap cars a lot), and it started exhibiting the same transmission symptoms you describe in post #489 (minus the coolant leak issue). So, I am going to attempt @VAGfan 's recommended fix. I will report back on how it went, and if the problem is resolved, will do a DIY thread on that repair.

Since you found the thread on the Y-pipe coolant leak, I assume that was resolved with minimal issues. Did you get your issue transmission issue resolved? If yes, can you post an update?

What I have found with the first gen Macan is that there are 4 recurring maintenance problems:
-The aforementioned Y-pipe coolant leak under the intake manifold. What was a $2,000 repair has now been reduced to about a $400 repair by a shop or a $100 DIY and is a permanent fix (rather than using a thin plastic pipe that will probably break again in 6 or 7 years). It's cheap & easy enough that frankly, people should do it proactively since it will strand you. Of the 13 Macans I have had, 2 experienced this problem during my brief ownership.
-The Transfer Case. What was a $5,000+ repair has now been reduced to about a $1,350 repair. You must understand that Macan transfer cases don't break - the friction plates inside (think "clutch plates) begin to wear out, causing a slipping feeling. You can buy reman transfer cases on eBay for $800, and they come with a 2-year warranty (same as the Porsche remans). Those are Porsche trasfer cases, just not rebuilt by Porsche. Transfer case fluid and a drive shaft clamp are about $50. I pay my indie mechanic $500 for labor. Total out the door is $1,350. Of the 13 Macans I've had, 4 have needed transfer case replacement. This one could easily be a DIY, but getting the driveshaft off the transfer case output shaft is apparently tricky (so says my mechanic), so I just let him do the job for me. It can't be that bad, though, since he seems happy every time he gets to do that job.
-Timing Chain cover oil leaks. What was a $10,000+ repair has now been reduced to $20 in parts and 2 hours of labor with the "2-bolt fix." I have just done the labor myself - it's a little tricky, but not bad once you have done it once and have the small format tools you need to work in a tight space. I have heard people say "well, my mechanic says that 2-bolt fix might not solve the problem," to which I say "OK, give me the name of the person that you know who had the 2-bolt fix done and it didn't work." There's never an actual person - they've just heard it might not work. I have had to do this on 3 of the 13 Macans I've briefly owned.
-The Mechantronic valve body failure. Lucky #13 Macan for me is the first one I've had with this problem. I'm going to try the repair/rebuild that @VAGfan describes. As I said above, I'll report back with results.

Other than these issues, the Macan appears to be very reliable. With any out of warranty European vehicle, you need to adopt an "I am the warranty" attitude and be willing to research, do some basic wrenching yourself and have a good indie mechanic for the tougher stuff (or things you don't have time to do yourself). These forums go a long way toward making that achievable. Access to a lift is helpful, too.
 
#502 ·
I did the Y Pipe diy thanks to the members on this forum who have also posted the youtube to it. Now the engine is too hot light is on now and still the transmission does not go past 1st gear and cannot reverse. I am thinking it is a thermostat and water pump issue or radiator and also the mechatronic or solenoids issue. What a head case it has been so far with many mechanics in the tristat NYC not willing to take on the repair or outrageous quotes. I guess they are all busy since its a hot summer season with many cars down. Thank you all for all the kind responses and helpful advice and DIY.
 
#506 ·
Yes I did do a code scan with my handy Autel obd2 dongle, Im not sure how it compares to a more professional scanner but all I got were these codes

1) P0700 - DME - Fault in transmission control unit
2) 00A016 - Instrument Cluster - Warning Check Engine
3) 89010E - Rear End Electronics - Alarm Siren Faulty
4) P174E00 - Transmission Control - Valve 3 in gear train half 2 - electrical fault

I also have a leak in the bottom not sure if its coolant or pdk fluid and now my engine over heat red check engine light came on too. I dropped it off at a local mechanic and is praying they know what they are doing. I only heard some ramblings of the clutch being defective and the rest I'm not sure of. If you have a guy and would like to recommend I'd be glad to utilize their service if this doesn't pan out. I already did the Y pipe DIY thanks to the members here and for Santirx's youtube videos. I am not sure how reliable these Porsches are after these repairs are made and is surprised by the quality of such a luxury car.
 
#508 ·
I'll find out next weekend! I have the separator plate, clutch solenoids, both pressure regulation solenoids, and both circuit boards on the way from Maktrans in Poland.

I'm pretty sure it's either the gasket plate or the clutch solenoids so I'm hoping throwing this whole kit at it will solve the issue. $287 for the full kit with all shipping and taxes.

What's the exact behavior you're getting?

(Thanks for the lenses by the way, they have already arrived!)
 
#511 ·
It started off by feeling a strange vibration after I come to a complete stop (about half a second after it shifts to gear 1). As in someone is trying to shift the gear box. Now this vibration is more pronounced and it spits the error regarding R gear. The shift from 2nd to 3rd also seems rougher than what I recall few years back when I got the car. It would sort of make sense that the 1st and 3rd gears are involves since they are on the same shaft.

I wouldn't hesitate to spend a few extra dollars to get the complete unit just so I don't need to get in there again. In fact I may have to pay for the work since my garage does not have a proper lift and I have a baby on the way few weeks from now.
 
#515 ·
Sigh, another one bites the dust. I am not sure why there isnt a recall on this or maybe its just not that common. I personally drive like a snail and hardly ever drive the car hard and I believe I just had the Slide Valve Body swapped out 3 years ago under warranty and only put in like 2k miles between that time and now this. It is disappointing for such a reputable brand like Porsche although its VW parts but still it is hard to believe that cars these days just don't last like them cars back then. I had an old Acura TL that was suppose to have a transmission recall and it never crapped out on me. I hope you other folks with this problem is able to get it resolved without paying a fortune.