New Member - Seeking Wisdom :) - MK4 Golf TDI - UK / ESSEX - Possible Limp Mode?

Discussion in 'VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum' started by w3sa, Feb 9, 2017.

  1. w3sa

    w3sa New Member

    Joined:
    Feb 9, 2017
    Messages:
    2
    Car:
    Golf MK4 2001 Plate Y REG
    Location:
    Essex UK
    Mods:
    None
    Afternoon fellow TDI Owners!

    Stumbled across this amazing source of information while trawling the internet looking for help with some issues with my newly obtained MK 4 Golf Tank TDI!

    Shes got 130k on the clock and body work is really clean and tidy for her age and I got her for a bargain at £750! All paperwork etc and Cambelt, clutch and all new tyres etc in the last 5k!

    But while making the 100mile trek home she hit what I believe to me limp mode... On the motorway, put my foot down, and felt loss of power, took forever to climb above 70mph and I wasn't to sure of the issue at this point and I almost thought it was normal as had never driven a VW before or turbo car for this matter.

    I stopped off at a service station about 10 miles away from my home and turned off the ignition and removed the key, started her back up again after a quick WC stop and well! She was going like shit of a stick!
    Amazing coming off the ramp and boosting like what I was expecting all the way home!
    Thinking in my head that shes been sitting about and must just have needed a clear out, how wrong must I have been!

    So im getting limp mode on average, mainly in 3rd gear, just above 3000RPM and it happened today in 4th and 5th.... (Owned for over a week now and done about 300miles or so)
    Booked into the garage for a ECU read and print out and hopefully you guys can help me with your knowledge to solve this little issue with me!

    Same thing applies though, turn the ignition off and back on and then it boosts as normal and goes like shit off a stick!

    Fully serviced today and added some fuel addictive to start off with the basics.

    I guess ill wait for the diag results tomorrow and go from there!
     
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  2. mgoff5000

    mgoff5000 Member

    Joined:
    Feb 27, 2012
    Messages:
    164
    Car:
    2000 Jetta 5-spd, 2004 Passat Wagon
    Location:
    SF Bay Area
    Mods:
    Jetta is on H&R SS/Koni Yellows, Skid plates on Jetta/Passat, BSD and cam replaced on Passat
  3. w3sa

    w3sa New Member

    Joined:
    Feb 9, 2017
    Messages:
    2
    Car:
    Golf MK4 2001 Plate Y REG
    Location:
    Essex UK
    Mods:
    None
    So the results are back from the ECU DIAG TEST -

    Results are as follows -

    Code - 17965/P1557/005463

    Symptoms - Reduced Power Output / Limp Mode

    Possible Causes -
    Boost pressure to high
    Hoses/Pipes incorrect connected, disconnected, blocked or leaking
    Charger Pressure Control defective
    VNT nozzles stuck
    Solenoid valve for N75 defective.

    Can anyone point me forward from here?

    Is it worth doing the oven cleaner job on the exhaust side of the turbo and give it a harsh run to see if that solves one of the problems?
     
  4. Oldaccord

    Oldaccord Active Member

    Joined:
    Jan 11, 2014
    Messages:
    649
    Car:
    1998 Beetle TDI
    Location:
    BC, Canada
    VAG Error Code: 17965/005463

    EOBD II Error Code: P1557

    Fault Location:
    Charge Pressure Control - Positive Deviation

    Possible Cause:
    Reduced power output.
    Limp mode.
    Limp mode: What is it, what are the causes, and how to fix it for the Audi and VW TDI diesel turbo

    Boost Pressure too High.
    Hoses/Pipes incorrectly connected, disconnected, blocked or leaking.
    Charger Pressure Control defective.
    Variable Nozzle Turbo (VNT) nozzles stuck.
    Charge Pressure Control Solenoid Valve (N75) defective.

    Possible Solutions:
    Check Hoses/Pipes to/between Components.
    Check Charge Pressure Control Solenoid Valve (N75).
    Check/Clean/Replace Charge Pressure Control.
    Check/Clean mechanism for variable nozzles.

    As taken from keithuk's Free EOBD II Error Codes software
     
  5. Seatman

    Seatman Well-Known Member

    Joined:
    Jul 9, 2010
    Messages:
    5,745
    Car:
    2000 Mk4 Golf Estate 1.9tdi 174 bhp
    Location:
    Scotland
    Mods:
    PP764's, turbo and mapping
    Vnt mechanism will most likely be sticking, info is in the faq pages.
     
  6. xeno555

    xeno555 Well-Known Member

    Joined:
    Dec 12, 2011
    Messages:
    1,640
    Car:
    2012 TDI Tech Package 6mt
    Location:
    Mile High
    Mods:
    Malone Stage II. Rawtek 3" from Turbo to Tail. Slammed on Koni. TSW Nurmburg Rims. Whiteline Sway & Ends. Panzer Plate.

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