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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old January 13th, 2008, 13:12   #1
PlantPWR
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TDI(s): 99 Beetle
Default New and exciting fault code; 17958 :D Need a VW genius please.

My sons laptop battery died ( they need to get Vag-Com to work on a mac) and these are the codes I got before it pooped out.
---------------------------------------------------------------------------
VAG-COM Version: Release 704.1

Data version: 20070723
Sunday,13,January,2008,15:56:52:50460
Chassis Type: 1C - VW Beetle
Scan: 01 02 03 08 15 17 19 22 29 35 37 39 46 54 56 75
Mileage: 140000km/86991miles

-------------------------------------------------------------------------------
Address 01: Engine Labels: 038-906-018.LBL
Part No: 038 906 018 BK
Component: 1,9l R4 EDC G000SG 2145
Coding: 00002
Shop #: WSC 00066
1 Fault Found:
17958 - Charge Pressure: Control Deviation
P1550 - 35-00 - -
Readiness: 0 0 1 1 1
------------------------------------------------------------------------------
While changing the fuel filter yesterday I noticed the nipple for the high pressure piece was in 2 pieces. It didnt look right so I put it back together and placed it in and held it down with the mickey mouse clip. Today at 5am I am scooting down the highway doing my best to get it up to 55 MPH. I pull into the parking garage and let it idle. The CEL is on. I got out of the car and noticed a copious amount of diesel under the front right bumper. I was late to work and went inside. When I came out this afternoon there was a good puddle on the ground. I came home and took out that piece. Being I am stranded without it I cleaned it very well and removed the old glue part from the white piece. I then super glued it back together. It sealed up very well and I put it back in. I took it for a spin about 30 mins later ( I wanted to be sure the glue had dried). Going up the road I have very little power. I thought it may be in limp mode, I came back and hooked up my VAG-COM. I got the above fault code and it wont clear out. There is no oil leaking any more.

If you saw my other thread I broke the nipple off of the brake hose by just touching it. I ordered a new one and can drive ok without power brakes. I have strong legs and 2 feet braking was what I had in my first car.

Is the above code for the brake issue or is it the fuel filter nipple?

TIA

Joe
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Old January 13th, 2008, 13:18   #2
MOGolf
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It's the brake hose issue. Without vacuum to the boost control, you're going to get that code. The small hose that broke off supplies the vacuum required to control the boost.
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Old January 13th, 2008, 13:21   #3
PlantPWR
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Mo you are the man!

Thanks

What are your thoughts about the power issue. I can barely do 55. No other fault codes at all.
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Old January 13th, 2008, 13:24   #4
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since it's an ALH engine, anything that affects the vacuum system (like the brake hose) will affect the turbo, EGR, and power brake systems... once you have the nipple, I would replace it with a hard flexible line like a coolant hose... however any parts place will have the heat shrink type that VW uses.

That's what your power issue is coming from...
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Old January 13th, 2008, 13:30   #5
PlantPWR
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You guys are quick! I was joking with my wife that it would take less than 10 minutes to have this worked out here. I really thank you all.

The old nipple is still stuck inside that very thick tube. I was thinking I would take it out with some needle nose I have. Your suggesting replacing the whole tube that comes off the nipple?

Thanks again.
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Old January 13th, 2008, 13:33   #6
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you can cut the tube with a rasor blade, that way you won't break the other nipple on the master cylinder.... just replace it with a coolant hose (mine's been that way for about a year... no problems here...) might also want to check out the vacuum lines for chafing.
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Old January 31st, 2008, 19:35   #7
Jay reno
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Alright, so i'm kionda new at this having owned a diesel a little over a year now. I have been having THAT VERY SAME PROBLEM!!!! no power ( pushing between 0-5 PSI' s of boost ) and two feet bracking... Now, what do i need to look for and were, i cant find any leakage of any kind anywhere and i havent done any recent work on the car ( too darn cold at -25 degrees Celcius... ) HELP!!!! PLEASE!!! and thank you in advance for youre help and support
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Old February 1st, 2008, 10:15   #8
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Look at the vacuum pump, on the right side of the cylinder-head as you're looking down at the engine. There is a 3" black hose that goes into a plastic check valve with a T in it. The rest of the piping is a hard plastic and it goes into the master cylinder. If you're having the exact symptoms the OP has, such as very hard brake pedal and no power, most likely that check valve is bad or the T is broken/cracked. All of the vacuum controlled systems on the car are fed vacuum from that T off the check valve. I had to replace it on my aunt's '03 NB. Cost me $45 for a new complete hose including check valve (dealer doesn't sell JUST check valve with Tee). Installed and everything is back to normal.
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Old February 1st, 2008, 15:00   #9
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Is this the t? Im having these symptoms but nothing seems bad....and i dont see where it goes into the master cylinder....I only see two steel braided lines coming out of the master cylinder that go to the proportioning vavle
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Old February 1st, 2008, 15:12   #10
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I think so, but look around at the other hoses to see if any of them have a hole in them.
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Old February 1st, 2008, 15:24   #11
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i cant find one
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Old February 1st, 2008, 15:35   #12
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It goes to the vacuum brake booster, not the master cylinder.

Do you hear any "air" type sound when you put your foot on the brake? If so then you have a failed seal in the brake booster. This can also cause these symptoms.
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Old February 1st, 2008, 17:56   #13
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what is the vac brake booster? is it the n75? im so flippn confused. lol
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Old February 1st, 2008, 21:07   #14
alphaseinor
 
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Quote:
Originally Posted by CTD&TDI


Is this the t? Im having these symptoms but nothing seems bad....and i dont see where it goes into the master cylinder....I only see two steel braided lines coming out of the master cylinder that go to the proportioning valve
is it just me or is the feed on the vacuum line chaffed?
How about the Vacuum reservoir line?

I'm going to say replace all of those lines...
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Old February 2nd, 2008, 03:08   #15
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i ordered all new from mc master
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