Hello, Superb 2.0 TDI 140kw dsg7 here.

During trip this error appeard and lose odd gears with eml light on, somehow manage to get on the location and swap OEM battery which was dead around 13% of life, but the error persists. Since I was on vacation and car been parked for 10 days with new battery, few times started for couple of mins only, EML light gone. After we had to back home and did 400km run without any problems.

 

P173600 clutch 2 position pressure sensor was stored and cleared via diag tool. This could be mechatronics problem for sure or bad battery cause electronic went crazy who knows. Want to check the clutch 1 and 2 valve pressures but need reference numbers for it, if somone know. Negative pressure is bad valve but how much in positive it goes, thank you !!!

Edited 19 August, 20241 yr by ile7

Sounds like the same issue I had Mechatronics Failure

Edited 19 August, 20241 yr by defsix

This is likely a mechatronic failure. Pretty expensive to replace. 

@defsixseen your post already, how warm gearbox should be in your case? Could you drive the car any further after error appeard? My car doing pretty normal for a while now...

Edited 20 August, 20241 yr by ile7

People seem to almost assume a repair is very expensive @RT_SGP, but first after getting a diagnosis the MCU if required refurbished or replaced might not be so expensive.

Maybe cheaper were @ile7 is than maybe other countries.

But as for Dealership / VW Group the cost can be eye watering.

http://briskoda.net/forums/topic/525725-dsg-mechatronic-failure-uk-parts-pricing-repair

 

 

The Failure rate being reported globally of DQ381 DSG,s is much more than there was with the DQ200,s that required a World Wide Recall where Europe was not part of the World because it was VW Group doing it. 

MCU can be fixed for around 600€ incl. VAT and shipping to Germany or Poland. Meanwhile want to check valves pressure via vcds and need reference.

 

 

It was usually after driving about 10KM+ , gearbox was at temperature. It used to just happen every so often going to work, 30KM approx. I could drive would was restricted to even gears. Restarting the car cleared the fault and gave me all the gears back. However on a longer journey it occurred 3 or 4 restarts, not ideal on the motorway.

Edited 20 August, 20241 yr by defsix

8 minutes ago, defsix said:

 

 

It was usually after driving about 10KM+ , gearbox was at temperature. It used to just happen every so often going to work, 30KM approx. I could drive would was restricted to even gears. Restarting the car cleared the fault and gave me all the gears back. However on a longer journey it occurred 3 or 4 restarts, not ideal on the motorway.

Thanks for reply. Same had here but that happend once around 1000 km ago, as I mentioned problem with battery could be related to that? 

Doubtful it's the battery. And don't forget to price in the oil too, best part of 7 litres

Sure, oil was changed 5k km ago, they told me around 3,2L went out while draining and put back 3,5L of new oil? 

Yeah, but this time you're taking our the MCU which first you'll have to drain the oil, plus you will lose the oil from the, you'll use more than a standard oil change.

@ile7  I would assume you had the oil changed at a place where they knew what they were doing, but then maybe they did not.

?

Was the filter changed at the service? 

 

How many km had it done when you had it serviced?

@Ootoherethey changed filter for sure, even skoda main garage don't do it as regular dsg service.

 

cca. 106000km

7 hours ago, Ootohere said:

People seem to almost assume a repair is very expensive @RT_SGP, but first after getting a diagnosis the MCU if required refurbished or replaced might not be so expensive.

Maybe cheaper were @ile7 is than maybe other countries.

But as for Dealership / VW Group the cost can be eye watering.

http://briskoda.net/forums/topic/525725-dsg-mechatronic-failure-uk-parts-pricing-repair

 

 

The Failure rate being reported globally of DQ381 DSG,s is much more than there was with the DQ200,s that required a World Wide Recall where Europe was not part of the World because it was VW Group doing it. 

 

I’m based in Singapore and my DQ381 MCU failed when the car was 3.5 years of age and around 65000km. The agent controlled this part and local suppliers do sell them without hardware warranty. Reconditioned sets are not cheap either. In the end, my workshop managed to source it from TVS with 1 year of hardware warranty. Total cost of replacement on a new MCU, fluids, programming and labour cost me SGD$4300… and I got my TVS DSG tune back with the replacement. 

 

Just sharing. 

Best to get your own fixed. It won't need re-coding to your car. Just get the 2 sensors replaced, I found it the most reasonable way to resolve it. 

22 minutes ago, defsix said:

Best to get your own fixed. It won't need re-coding to your car. Just get the 2 sensors replaced, I found it the most reasonable way to resolve it. 

That is mine opinion too if it's MCU really in defect, 600€ plus new oil

9 hours ago, defsix said:

Best to get your own fixed. It won't need re-coding to your car. Just get the 2 sensors replaced, I found it the most reasonable way to resolve it. 

I considered this too as part of my research for resolving MCU issues. Unfortunately reconditioned MCU in Singapore is not cheap either. A reconditioned unit cost around SGD$3k with oil and labour versus brand new at SGD$4300 with oil and labour. 

5 hours ago, RT_SGP said:

I considered this too as part of my research for resolving MCU issues. Unfortunately reconditioned MCU in Singapore is not cheap either. A reconditioned unit cost around SGD$3k with oil and labour versus brand new at SGD$4300 with oil and labour. 

Was that price for getting yours rebuilt or just buying a replacement?

20 hours ago, defsix said:

Was that price for getting yours rebuilt or just buying a replacement?

I did a replacement of a new MCU in the end as the rebuilt was only 1k cheaper. 

Is it possible to check sensor live values with vcds or similar?

3 hours ago, ile7 said:

Is it possible to check sensor live values with vcds or similar?

Yes, bit of it's an intermittent fault live data won't show much. Unless it just happens to happen whilst you're on VCDS.

Should be in the Transmission Module 

@defsixecu.de repaired unit for you. Both sensors changed or the faulty one?

 

2 hours ago, ile7 said:

@defsixecu.de repaired unit for you. Both sensors changed or the faulty one?

 

 

Both seniors replaced.

3 minutes ago, defsix said:

 

Both seniors replaced.

On request or they do it by default? Spoke to them few mails but they reply in german all the time.

From my understanding it's both are replaced. I had contacted a number of places to do this job and they all said both.