Power not what it used to be..

Discussion in 'VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum' started by BigLarry, May 13, 2017.

  1. BigLarry

    BigLarry New Member

    Joined:
    Dec 9, 2016
    Messages:
    4
    Car:
    2002 Volkswagen Passat Wagon 1.9L TDI
    Location:
    Germany
    Mods:
    None
    Hi;

    I have a euro spec 2002 VW Passat wagon with the 1.9l TDI engine (avb). I think this is the right forum to post this thread. I've had the car for almost a year. It starts and runs fine and the check engine light has never come on. It has never gone into limp mode.

    My issue is that the power just isn't what it used to be. When I first bought the car I was very impressed with the pickup/acceleration. When I would stomp on the pedal it would pull a little for about one second and then it would take off like a rocket. There was a very distinct punch. When turning out onto the highway I had to be careful not to floor it too soon so I didn't break the rear end lose in the corner. During my initial test drive I had it up to 100mph on the autobahn going uphill out of town and it was still pulling. The car seemed to love to run. I would also get around 36-38mpg depending on how spirited I drove and how many highway miles I drove.

    That was in August last year. Around October when the weather turned cold here in Germany the power started to drop off. The car will still accelerate and drives ok. I can still go 100mph if I want too but the car just doesn't like to run like that. During hard acceleration the "pull" is a lot more linear. It will get up to speed but that distinct punch is gone. Passing on the highway takes a lot more time. The car won't jump out into traffic like it used to. Mileage went down to 32-34pmg also.

    As I said, the car is still fun to drive and performs at an acceptable level. If I were just buying it now I would be happy with the performance. I'm just frustrated because I know she's got more in her than I'm getting right now. Based on all that I've read I finally broke down and bought a VCDS from Ross Tech. I ran the auto scan function. See below. The thing that caught my eye was the coolant temp sensor fault. Should I just replace it?

    I've tried to do a bunch of reading in the forums and FAQ but I'm getting overwhelmed pretty fast. Can anyone recommend a logic/diagnostic trail to follow? I flipped through a bunch of the screens in the VCDS program but I'm like a pig staring at a wristwatch. I obviously don't want to fix something that isn't broke or brake something by screwing with something I shouldn't.

    Please tell me what I should do about the coolant temp fault and than recommend a diagnostic sequence to figure out what is up with the lower power.

    Sorry for the realy long post. I wanted to make sure I gave you all the needed info.

    Thanks

    Larry

    Saturday,13,May,2017,10:29:16:45472
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 17.1.3.0 (x64) HEX-V2 CB: 0.4336.4
    Data version: 20170320 DS267.7
    www.Ross-Tech.com


    VIN: WVWZZZ3BZ2E404188 License Plate:
    Mileage: 227070km-141094mi Repair Order:



    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------


    Chassis Type: 3B (3B - VW Passat B5 (1997 > 2005))
    Scan: 01 02 03 08 15 16 17 19 35 36 37 46 47 55 56 57 58 75 76 77

    VIN: WVWZZZ3BZ2E404188 Mileage: 227070km-141094miles
    -------------------------------------------------------------------------------
    Address 01: Engine Labels: 038-906-019-AVB.lbl
    Part No: 038 906 019 GL
    Component: 1,9l R4 EDC G000SG 1495
    Coding: 00002
    Shop #: WSC 05314
    VCID: 6788B2F29676CE3F8C3-4B1E
    WVWZZZ3BZ2E404188 VWZ7Z0B5023748

    1 Fault Found:
    17664 - Engine Coolant Temp Sensor (G62)
    P1256 - 35-10 - Open or Short to Plus - Intermittent
    Readiness: 0 0 X X X

    -------------------------------------------------------------------------------
    Address 03: ABS Brakes Labels: 4B0-614-517.lbl
    Part No: 4B0 614 517 G
    Component: ABS/ESP front 1728
    Coding: 04255
    Shop #: WSC 05311
    VCID: 2514F8FA2CFA1C2F7EF-51F2

    No fault code found.

    -------------------------------------------------------------------------------
    Address 08: Auto HVAC Labels: 3Bx-907-044.lbl
    Part No: 3B1 907 044 H
    Component: CLIMATRONIC B5GP 0008
    Coding: 17000
    Shop #: WSC 05311
    VCID: 2616FFF651FC1737775-5184

    3 Faults Found:
    00603 - Footwell/defroster Flap Positioning Motor (V85)
    35-10 - - - Intermittent
    01271 - Positioning Motor for Temperature Flap (V68)
    35-10 - - - Intermittent
    01274 - Air Flow Flap Positioning Motor (V71)
    35-00 - -

    -------------------------------------------------------------------------------
    Address 15: Airbags Labels: 6Q0-909-605-VW5.lbl
    Part No: 1C0 909 605 B
    Component: 0A AIRBAG VW51 04 0004
    Coding: 12353
    Shop #: WSC 05311
    VCID: 2310E6E222CEE21F10B-513C

    1 Fault Found:
    00532 - Supply Voltage B+
    07-10 - Signal too Low - Intermittent

    -------------------------------------------------------------------------------
    Address 17: Instruments Labels: 3B0-920-xx5-17.lbl
    Part No: 3B0 920 827 A
    Component: KOMBI+WEGFAHRSP VDO V08
    Coding: 05115
    Shop #: WSC 00000
    VCID: 221EE3E63DD4EB171BD-513C
    WVWZZZ3BZ2E404188 VWZ7Z0B5023748

    1 Fault Found:
    01039 - Coolant Temperature Sensor (G2)
    30-10 - Open or Short to Plus - Intermittent

    -------------------------------------------------------------------------------
    Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
    Part No: 6N0 909 901
    Component: Gateway K<->CAN 0001
    Coding: 00006
    Shop #: WSC 05314
    VCID: 70BAD9AEA3B80987DD9-513C

    No fault code found.

    -------------------------------------------------------------------------------
    Address 46: Central Conv. Labels: 1C0-959-799.lbl
    Part No: 1C0 959 799 A
    Component: 0H Komfortgerát HLO 0003
    Coding: 00067
    Shop #: WSC 05311
    VCID: 353428BA9C5A6CAFCEF-4B1E

    Subsystem 1 - Part No: 1C1959801
    Component: 0H Tõrsteuer.FS KLO 0004

    Subsystem 2 - Part No: 1C1959802
    Component: 0H Tõrsteuer.BF KLO 0004

    No fault code found.

    -------------------------------------------------------------------------------
    Address 56: Radio Labels: 1J0-035-15x-56.lbl
    Part No: 1J0 035 152 E
    Component: Radio GRO 0001
    Coding: 00003
    Shop #: WSC 05311
    VCID: 201AE9EE33D8F9070D9-4B7A

    No fault code found.

    End----------(Elapsed Time: 06:40, VBatt start/end: 12.2V/14.2V)-----------
     
    Last edited by a moderator: May 13, 2017
  2. crsmp5

    crsmp5 Well-Known Member

    Joined:
    Feb 14, 2012
    Messages:
    1,427
    Car:
    85 kubvan
    october here= winter blend fuel... which burns poopy vs summer fuel.. what fuel does your station have in the tank?? do they use a winter vs summer blend to help prevent gelling of the fuel in cold weather

    what engine does the passat have?? does it have a ve pump on it or injectors under the valvecover?

    if injectors under vc.. the pull vc to inspect the cam... the lobes wear out.. also may not turn a light on but run like poo

    for both if intake is plugged... egr soot and oil vapor = tar/sludge.. it will not nessaserly turn on a light.. but kills performance

    a plugged cat/soot filled muffler will not turn on a light.. but kills power... ive seen oil/tar/soot residue add 50lbs of weight to the muffler.. can plug one up..
     
  3. Keithuk

    Keithuk Super Moderator

    Joined:
    Aug 29, 2010
    Messages:
    6,944
    Car:
    2010 Golf GTD (170) CBBB
    Location:
    Stoke on Trent, England
    Manufacturer: VW, Date(s) Used: 02/2000-05/2005, Model: Passat/4Motion/Variant, Engine Code: AVB, 74Kw, 100PS, 1.9 Ltr, 4 Cyls , Remarks: Turbocharged Direct Injection Pumpe Düse (TDI-PD)

    VAG Error Code: 17664

    EOBD II Error Code: P1256

    Fault Location:
    Engine Coolant Temperature Sensor (G62) Circuit - Open Circuit/Short Circuit to B+

    Possible Cause:
    Difficulties with starting a cold engine.
    Diesel: an indication is extreme long time burning time of the glow indication light.
    Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
    RPM at idle is irregular.
    With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm.
    With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
    Bad acceleration during warming up.

    Fuse(s).
    Wiring/Connector(s).
    Engine Coolant Temperature Sensor (G62) faulty.

    Possible Solutions:
    Check/Replace Fuse(s).
    Check/Replace all faulty Wiring/Connector(s).
    Read Measuring Value Blocks (MVB).
    Check/Replace Engine Coolant Temperature Sensor (G62).

    Special Notes:
    In MY 1995-2002 (?) in Europe at VW-cars the G2/G62 had the bad reputation of breaking down often. The default G2/G62 is black and all replacements are green.

    VAG Error Code: 00603

    Fault Location:
    Footwell/Defroster Flap Motor (V85) - Faulty

    Possible Cause:
    Wiring/Connector(s).
    Positioning Motor for Footwell/Defroster Flap Motor (V85) blocked.
    Positioning Motor for Footwell/Defroster Flap Motor (V85) faulty.

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s).
    Check/Repair Obstructions or Blockage.
    Check Footwell/Defroster Flap Motor (V85).
    Read Measuring Value Blocks (MVB).
    Perform Output Test.
    Perform Basic Setting.

    Special Notes:
    Common HVAC Basic Settings Group(s) include 000 or 001.

    VAG Error Code: 01271


    Fault Location:
    Positioning Motor for Temperature Regulator Flap Motor (V68) (HVAC) - Open Circuit/Short to Earth/Positive/Upper Limit Exceeded/Faulty/Blocked or No Voltage

    Possible Cause:
    Fuse(s).
    Wiring/Connector(s) from/to Positioning Motor for Temperature Flap (V68) faulty.
    Positioning Motor for Temperature Flap (V68) blocked.
    Positioning Motor for Temperature Flap (V68) faulty.

    Possible Solutions:
    Check/Replace Fuse(s).
    Check/Replace all faulty Wiring/Connector(s).
    Check Positioning Motor for Temperature Flap (V68).
    Read Measuring Value Blocks (MVB).
    Perform Output Test.
    Perform Basic Setting.

    VAG Error Code: 01274


    Fault Location:
    Air Flow Flap Positioning Motor (V71) - No or Incorrect Basic Setting/Adaptation/Blocked or No Voltage/Faulty/Lower Limit Exceeded/Mechanical Failure

    Possible Cause:
    Wiring/Connector(s).
    Positioning Air Flow Flap Positioning Motor (V71) blocked.
    Positioning Air Flow Flap Positioning Motor (V71) faulty.
    Check mechanical condition of components.

    Possible Solutions:
    Check/Replace all faulty Wiring/Connector(s).
    Check Air Flow Flap Positioning Motor (V71).
    Read Measuring Value Blocks (MVB).
    Perform Output Test.
    Perform Basic Setting.

    VAG Error Code: 00532

    EOBD II Error Code: P1750

    Fault Location:
    Supply Voltage B+ - Supply Voltage too Low/Open Circuit/Signal too Low/Signal too High/Lower Limit Exceeded/Upper Limit Exceeded

    Possible Cause:
    Malfunction Indicator Lamp (MIL)(K83) active.

    Fuse(s).
    Wiring/Connectors from/to ABS Control Module (J104)/Brake Electronics Control Module (J104).
    This Diagnostic Trouble Code (DTC) is only stored, if it occurs the first time the vehicle exceeds 6 km/h.
    As soon as the supply voltage is again within the valid voltage range, the system is switched back on and the warning lights turn off.
    Open circuit or resistance too high between voltage supply of terminal 15 and ABS Control Module (J104)/Brake Electronics Control Module (J104) (terminal 1).
    Open circuit or resistance too high in earth supply to ABS Control Module (J104)/Brake Electronics Control Module (J104) terminals 28 & 29.
    Voltage jumps in vehicle.
    Power Supply (Battery/Generator) faulty.

    Possible Solutions:
    Check/Replace Fuse(s).
    Check/Replace all faulty Wiring/Connectors from/to Control Module.
    Check Power Supply (Battery/Generator).
    Read Measuring Value Blocks (MVB).

    Special Notes:
    When found in an individual control module, it's most likely a local source (e.g. wiring/connectors).
    When found in multiple control modules at the same time, it's most likely a common source (e.g. ground spot, battery, generator).
    Intermittent codes are often stored during low outside temperature when the battery capacity goes down and may be ignored.
    Common with 16946/P0562/001378 - System Voltage: Too Low stored in other control modules.

    VAG Error Code: 01039


    Fault Location:
    Coolant Temperature Sensor (G2) - Open Circuit/Short Circuit to Earth/Positive

    Possible Cause:
    Difficulties with starting a cold engine.
    Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
    RPM at idle is irregular.
    With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm.
    With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
    Bad acceleration during warming up.
    Diesel: an indication is extreme long time burning time of the glow indication light.

    Fuse(s).
    Wiring/Connector(s).
    Coolant Temperature Sensor (G2) faulty.

    Possible Solutions:
    Check/Replace Fuse(s).
    Check/Replace all faulty Wiring/Connector(s).
    Read Measuring Value Blocks (MVB).
    Check/Replace Coolant Temperature Sensor (G2).

    Special Notes:
    In MY 1995-2002 (?) in Europe at VW-cars the G2/G62 had the bad reputation of breaking down often.
    The default G2/G62 is black and all replacements are green.

    As taken from my new Free EOBD II Error Codes software

    If you have a genuine VCDS then I suggest you register it online VCDS Dongle Registration then you can join Ross-Tech forum. Make a new thread with a full AutoScan attached.

    How to post an Auto-Scan
     
  4. xeno555

    xeno555 Well-Known Member

    Joined:
    Dec 12, 2011
    Messages:
    1,684
    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.
    Lot of unrelated errors. Either you let them go for a while to collect or you may have battery issues. Do some clear?
     
  5. BigLarry

    BigLarry New Member

    Joined:
    Dec 9, 2016
    Messages:
    4
    Car:
    2002 Volkswagen Passat Wagon 1.9L TDI
    Location:
    Germany
    Mods:
    None
    Xeno;

    I just got the VCDS device so this was my first scan. How would I clear the codes to try and scan again?

    Right now I think I have a two part question. This is my first diesel though so this could just be my ignorance talking.

    First, based on the scan results should I replace the coolant temp sensor? Can that sensor cause any loss of power/fuel economy symptoms that I have been seeing?

    Second, if it isn't the temp sensor what are the next logical diagnostic steps I need to take based on my symptoms? What I'm looking for is something like this:

    1. Disconnect air inlet and look into the intake manifold to see if it is clogged up. A little soot buildup is ok but if the crud is more than a quarter inch thick it needs to be cleaned. The best way to clean is...... (on the car/off the car/soak in soapy water/simple green/etc.???)
    2. Check the MAF sensor. Use VCDS module XX and select group YY. Record and post results.
    3. Check the MAP.
    ETC. ETC.

    Steps 1-3 above are a complete SWAG so don't sharp shoot my guess. I'm just trying to illustrate a point. I am a complete novice on VW diesels but have worked on vehicles as a hobbyist for a long time. I'm familiar with the diagnostic process I just don't what that process is on this vehicle.

    Hopefully this all makes some sense.

    Thanks!
     
  6. Keithuk

    Keithuk Super Moderator

    Joined:
    Aug 29, 2010
    Messages:
    6,944
    Car:
    2010 Golf GTD (170) CBBB
    Location:
    Stoke on Trent, England
    Download the PDF manual. http://www.ross-tech.com/vcds/download/current.php

    After you have done a scan and saved the log file you click on the [Clear All DTCs] button, then you can rescan.
     
  7. crsmp5

    crsmp5 Well-Known Member

    Joined:
    Feb 14, 2012
    Messages:
    1,427
    Car:
    85 kubvan
    yes temp sensors fail.. yes if the computer side of temp sensor fail will give issues... compair temp readings via gauge in dash vs what computer is reading if off any amount its usually bad..
     
  8. BigLarry

    BigLarry New Member

    Joined:
    Dec 9, 2016
    Messages:
    4
    Car:
    2002 Volkswagen Passat Wagon 1.9L TDI
    Location:
    Germany
    Mods:
    None
    Ok. I'll try both of those Saturday morning and report back.

    Thanks!
     

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