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VW Touareg TDIs This is a general discussion about Touareg TDIs. Non TDI related postings will be moved or removed.

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Old July 12th, 2010, 15:31   #1
nhdoc
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Default A friend with 2006 Toureg TDI and DTC P1952

My friend's 2006 Touareg lost turbo boost and threw a CEL and DTC P1952 which relates to the turbo charger control module 1 defective. It's on its way to the dealer but he suspects the worst case is they will say replace both turbos...that seems to be their response to any turbo issues on these. Since it is just out of warranty (65K miles) he's asked for goodwill for any repair but hasn't officially been told one way or another. Does anyone know whether there is a common issue that can cause these symptoms or are new turbos just the standard fix all.

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Old July 13th, 2010, 06:29   #2
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The V10's can go through turbo's. I hope he gets some good will if not the bill is going to be pricey. He is aware they drop the motor to replace said turbos? They are generally better off to replace both while the motor is already out so you are not back in there in a month or two with the other one blown.
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Old August 4th, 2010, 03:54   #3
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Update: it turns out that certain states, MA among them, require coverage of emissions-related components until 7 years, 70k miles, so my car, which is registered in MA, is being repaired under warranty.
While they have the motor out, can anyone suggest any other components that it would make sense to change? It would be a bummer to have an exhaust sensor fail and have to take out the engine all over again (and on my nickel)..
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Old August 8th, 2010, 15:38   #4
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It it was expensive new, you can truly bet it will be expensive when it gets older. While the V10 TDI is truly a torque monster, a fat wallet really helps in keep it in the groove.
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Old August 28th, 2010, 04:38   #5
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Further update: I visited the car yesterday and the engine/transmission/front end are now sitting on the dolly with the body of the car suspended on the lift...an awesome sight! The old turbos were gone (returned as cores already) but the new ones, with Honeywell stickers but no other markings, were ready to be installed. The only thing I noticed that looked amiss was some carbon buildup in the air intake on the top of the engine. They agreed to give me a price to remove and clean it.

They also have replaced the electronic thermostat assembly (a substantial cast aluminum body with machined couplings to coolant hoses and an electric sensor wire was all I could see, it having been installed already) which they said was indicated by an error code, but which they had not mentioned in the original diagnosis...this seems strange. is it possible that a malfunctioning thermostat could have caused the problems with the turbos? There was never any evidence of overheating.
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Old September 9th, 2010, 21:35   #6
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did you get it back from the shop yet?
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Old September 10th, 2010, 18:07   #7
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Yes, I picked it up last week. So far, so good ! She runs like a top and seems as good as new.

Contrary to the dealer service guy's earlier statement that they would be changing the oil as a part of the turbo replacement, they in fact only topped it up with 4 quarts and did not change the filter.

It is going to Precision Imports in Manchester, NH on Monday morning for an oil change and thorough looking over...
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Old September 13th, 2010, 07:28   #8
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"Final" Update (fingers crossed)...Josh at Precision Imports said that everything looks great. He changed the oil while I waited and let me walk around under the lift and see everything back where it belongs (as opposed to a couple of weeks ago when the engine and tranny were on the dolly and the rest of the car was on the lift above). The shiny new turbos are visible from underneath and all of the various components are where they should be. With 12 fresh quarts of 507 spec oil the engine feels perfect. I gave it a thorough interior and exterior cleaning this weekend so it really looks great.
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Old September 13th, 2010, 23:48   #9
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Glad to hear things checked out ok and your entire fleet is up and running again.
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Old September 14th, 2010, 02:28   #10
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Thank you. It's nice to know that the engine can come out and go back in without any problems, but I don't want to try it again to be extra sure!
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Old September 14th, 2010, 10:35   #11
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GAWD 12 quarts! YIKES! One holy mother expensive oil change!
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Old September 14th, 2010, 20:31   #12
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Quote:
Originally Posted by leicaman View Post
GAWD 12 quarts! YIKES! One holy mother expensive oil change!

yep good thing is, its only every 10K
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Old October 11th, 2010, 04:34   #13
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Further info: I met a veteran vw service manager from a Boston area vw dealer yesterday who says that the turbo failures stem from the corrosion and breaking of a pin that holds a rod that controls the waste gate. The failed pin causes the waste gate to stay open, which causes an imbalance in pressures, so the good turbo is also shut down and the cel illuminated. The new turbos have a galvanized pin that won't fail, but even if they do, he has developed a technique to replace it without removing the engine from the car or replacing the whole turbo units (which have to be replaced in pairs because they are a matched set, not simply because "once you're in there")

Pm me if you would like his contact information...it could save you a ton of time and money if you have this problem...
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Old March 10th, 2012, 13:10   #14
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Quote:
Originally Posted by NHV10 View Post
Further info: I met a veteran vw service manager from a Boston area vw dealer yesterday who says that the turbo failures stem from the corrosion and breaking of a pin that holds a rod that controls the waste gate. The failed pin causes the waste gate to stay open, which causes an imbalance in pressures, so the good turbo is also shut down and the cel illuminated. The new turbos have a galvanized pin that won't fail, but even if they do, he has developed a technique to replace it without removing the engine from the car or replacing the whole turbo units (which have to be replaced in pairs because they are a matched set, not simply because "once you're in there")

Pm me if you would like his contact information...it could save you a ton of time and money if you have this problem...
Looking at doing turbos on my V-10, PM sent.
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