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  1. #1
    Established Member Two Rings brianB7's Avatar
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    Gas pedal not working VW (no one in general talk has answered)

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    I know this is supposed to go in general car talk and i tried but nobody seems to respond there so please help here
    My buddy owns a 2001 vw jetta and recently called me to help him out.
    He was driving down the road when his gas pedal stopped working. I went down to check it out and saw that his 02 sensor harness wires had drug on the ground and snapped. He had it towed and the shop replaced the 02 harness but the gas pedal still isn't working and this shop can't figure out why. Any ideas on what else I can tell these expert mechanics to check...TIA

  2. #2
    Veteran Member Four Rings mr shickadance's Avatar
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    Jul 08 2010
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    tucson
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    perhaps other electronics got ripped out as well as the 02 sensor?
    Scott

    2011 S4

    America is all about speed, hot, nasty, bad-ass speed - Eleanor Roosevelt

    DIY: How to make yourself look like an idiot.

  3. #3
    Senior Member Four Rings bman005's Avatar
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    Sep 06 2011
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    06 GTI
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    Can you get a list of faults? Might help a little. Is it a 1.8t?
    New Build, 2010 Tiguan. Details to com

  4. #4
    Veteran Member Four Rings doublezero30's Avatar
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    08 BMW 135i grey/red leather
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    i believe these cars have a throttle position sensor which sounds like it could have failed. i believe you have to get the whole pedal to replace the sensor. fyi, the 02 sensor wiring has nothing to do with this issue as it is just there for emissions purposes.
    -Nate

    07 Ibis White A4 S-Line Ti Package [SOLD]
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  5. #5
    Senior Member Four Rings bman005's Avatar
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    There are 4 sensors, 2 in the throttle body and 2 in the pedal.


    OP where in PA are you? I may be able to offer you some assistance in person
    New Build, 2010 Tiguan. Details to com

  6. #6
    Established Member Two Rings brianB7's Avatar
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    thanks guys, its a 2.0 but the shop didn't give him the codes they got he said he'll call tomorrow I told him to let them know about the throttle position sensor it sounds like the shop he took it to doesn't really know much about german cars so i appreciate the feedback

  7. #7
    Veteran Member Four Rings doublezero30's Avatar
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    08 BMW 135i grey/red leather
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    Quote Originally Posted by bman005 View Post
    There are 4 sensors, 2 in the throttle body and 2 in the pedal.


    OP where in PA are you? I may be able to offer you some assistance in person
    stand corrected. i would still suspect one of these sensors however.
    -Nate

    07 Ibis White A4 S-Line Ti Package [SOLD]
    B7A4 Build Thread: http://www.audizine.com/forum/showth...58#post7310258

  8. #8
    Senior Member Four Rings bman005's Avatar
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    There is a "chance" that it only needs throttle adaptation then
    New Build, 2010 Tiguan. Details to com

  9. #9
    Established Member Two Rings brianB7's Avatar
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    I am in Philly , my buddy lives in scranton

  10. #10
    Senior Member Three Rings rarak69's Avatar
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    Jul 15 2007
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    The ecu is fried, get a new one.

    The internal circuits on the ECU are tied together (throttle drive and rear O2 sensor) The rear O2 sensor shorted thus frying the throttle drive circuit.
    B5 S4 Avant 6MT (Being restored)

  11. #11
    Senior Member Four Rings Charles.waite's Avatar
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    2004 A4 1.8TQ 6MT USP • 2006 A4 Avant 2.0T tip
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    ^^^^ Not sure if serious? Get a new ECU??? That sounds a bit drastic for what is most likely a failed Throttle Position sensor... Easy to test for in VCDS by the way...
    -CP
    USP CLUB MEMBER #136
    2004 A4 1.8TQ 6MT USP - APR Stage 1+ - FSI Coils - BKR7EIX-11 - 034 Rear Swaybar (Soft Setting) and Endlinks - B6S4 Front + B7A4 Rear Brakes - 034 Street Trans Mount
    2008 Black Unicorn (2.0t S-Line Ti 6MT Avant) - Bosch FR6KPP332S
    SOLD -- 2006 A4 2.0TQ Avant Tiptronic stocker - Failing TC Mod

  12. #12
    Senior Member Three Rings rarak69's Avatar
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    Quote Originally Posted by Charles.waite View Post
    ^^^^ Not sure if serious? Get a new ECU??? That sounds a bit drastic for what is most likely a failed Throttle Position sensor... Easy to test for in VCDS by the way...
    Dead serious mate.

    I have been tuning these ecu's for 7 years almost, and i have seen this many times, if you dragged the O2 harness, or it was split and you get a non functioning throttle, this is always what happened in my situation.


    easy test with VCDS like said, watch the throttle position sensors and watch them not do anything :)

    BTW, ecu uses only one of those sensors(the 0 - 100%) for normal use, the other is a 100-0% percent sensor, its used as the backup, and for plausibility checks of the DBW system.
    B5 S4 Avant 6MT (Being restored)

  13. #13
    Senior Member Four Rings bman005's Avatar
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    06 GTI
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    Unplug the MAF and see if throttle comes back. If not then I'd have to say that rarak69 is absolutely correct. I've run into O2 issues in the past that have in turn crapped out the MAF to the point where it bogs down and stalls out the car once you try to give it any throttle. That being said, none of those cars had the O2 harness rubbed through. And I have to agree that if the O2 wires touch together that it would most likely cause an ECM failure
    New Build, 2010 Tiguan. Details to com

  14. #14
    Established Member Two Rings NODO-GT's Avatar
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    Jul 30 2010
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    Audi A4 B7 2.0T Quattro 6MT
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    Tbilisi

    I had the same problem with my previous car passat b5.5, It left it at night outside in the rain and the ECU got wet, and gas pedal was not working.
    I took it to VW dealer and they cleaned & dried ECU and everything started to work :)

  15. #15
    Senior Member Three Rings rarak69's Avatar
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    OP please make sure that you post solution for others to find! biggest mistake i see on forums, people ask help, 800 idea's are popped up, they get car working but never report solution! Help many others down the line please!
    B5 S4 Avant 6MT (Being restored)

  16. #16
    Veteran Member Four Rings Leo14's Avatar
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    Quote Originally Posted by brianB7 View Post
    I am in Philly , my buddy lives in scranton
    Roflmao, my friend(s) are in philly/scranton U.

    Sorry bout your buddies car, good luck!
    RIP QG TI B7 A4

  17. #17
    Established Member Two Rings brianB7's Avatar
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    Thanks for all the responses guys, Ive let him know what to tell the shop and once they figure out what the problem is ill post it here...sucks that he might have to get a new ECU ...I told him to just buy an Audi

  18. #18
    Senior Member Three Rings rarak69's Avatar
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    Quote Originally Posted by brianB7 View Post
    Thanks for all the responses guys, Ive let him know what to tell the shop and once they figure out what the problem is ill post it here...sucks that he might have to get a new ECU ...I told him to just buy an Audi
    ecu should be pretty cheap for that car, 75-100 then take the immobilizer off or match it over, 2001 probably immo2 so easier to swap in.
    B5 S4 Avant 6MT (Being restored)

  19. #19
    Senior Member Four Rings bman005's Avatar
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    Too bad it isn't a 1.8t, I have a couple layin around
    New Build, 2010 Tiguan. Details to com

  20. #20
    Senior Member Four Rings Charles.waite's Avatar
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    2004 A4 1.8TQ 6MT USP • 2006 A4 Avant 2.0T tip
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    Quote Originally Posted by rarak69 View Post
    Dead serious mate.

    I have been tuning these ecu's for 7 years almost, and i have seen this many times, if you dragged the O2 harness, or it was split and you get a non functioning throttle, this is always what happened in my situation.


    easy test with VCDS like said, watch the throttle position sensors and watch them not do anything :)

    BTW, ecu uses only one of those sensors(the 0 - 100%) for normal use, the other is a 100-0% percent sensor, its used as the backup, and for plausibility checks of the DBW system.
    Damn! I stand corrected then. Is that an issue isolated to VW models or could it potentially affect our Audis as well?
    -CP
    USP CLUB MEMBER #136
    2004 A4 1.8TQ 6MT USP - APR Stage 1+ - FSI Coils - BKR7EIX-11 - 034 Rear Swaybar (Soft Setting) and Endlinks - B6S4 Front + B7A4 Rear Brakes - 034 Street Trans Mount
    2008 Black Unicorn (2.0t S-Line Ti 6MT Avant) - Bosch FR6KPP332S
    SOLD -- 2006 A4 2.0TQ Avant Tiptronic stocker - Failing TC Mod

  21. #21
    Registered Member One Ring
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    Apr 25 2013
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    Rochester, NY

    I think I've got this exact same problem with a 2003 VW GTI, 1.8L turbo.

    The throttle is dead with corresponding error codes after O2 sensors were replaced.

    Anyone have additional details on the ECU damage ? I'm wondering if it might be possible to repair by replacing a component or something on the board. The ECU otherwise seems to be good since the engine runs and there are no other error codes.

    It seems really strange that shorting the O2 sensors would damage the throttle circuit and leave everything else working.

  22. #22
    Veteran Member Three Rings your daddy's Avatar
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    May 29 2007
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    check all fuses 1st. you just shorted a bunch of wires together... and of course scan the ecm. if it even communicates (IE power to it)
    Rick autoengineering.com

  23. #23
    Senior Member Three Rings RAudiB7A4's Avatar
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    Nov 08 2010
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    2011 Toyota Corolla S
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    Wondering if this might be the issue with my car. I was driving along Friday night when all of a sudden I get a flashing CEL and the gas pedal stopped working, so I pulled over thinking I'd check the fault code with my APR Mobile but it won't pick it up. Car starts, idles, and runs just fine but when I push the gas pedal the tack blips but the engine has no response. At first I thought it is probably just a bad throttle position sensor or bad throttle body but I talked to a buddy of mine who owns a VW/Audi performance shop and he thinks it may be a fried ECU as he said he's had 3 or 4 B7's come in recently with fried ECU's.

    I'll be getting the car vag-com'd in a couple hours here so hopefully that points me in the right direction.
    APR Stage II B7 A4

  24. #24
    Established Member Two Rings lesurfman's Avatar
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    Mar 03 2010
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    montréal, Canada

    Do you have APR anti-theft?

    If so read this thread
    http://www.audizine.com/forum/showth...ar-Please-help!
    Sprint Blue 2007 A4 2.0T MT6 Quattro S-Line Titanium
    APR Stage II Tune (Stock, 91, 93, and valet modes) - APR Carbonio CAI - APR Snub Mount - 034 Motorsports Turbo Inlet Hose - RAI 3" HFC - OEM "D rev" DV - RS4 Rear Sway Bar - RS4 Pedals - New South Performance Vent Boost Gauge.

  25. #25
    Senior Member Three Rings RAudiB7A4's Avatar
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    Nov 08 2010
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    2011 Toyota Corolla S
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    Quote Originally Posted by lesurfman View Post
    Do you have APR anti-theft?

    If so read this thread
    http://www.audizine.com/forum/showth...ar-Please-help!
    I don't have anti-theft. Just security lock out as far as I know. These symptoms are eerily similar to mine though. I'll try entering my security code (since it is locked out currently to prevent changing tunes accidentally) and changing tunes and then locking it out again tonight.

    Otherwise I've heard it's possible I have a bad relay. I had the car vag-com'd last night with no fault codes found.
    APR Stage II B7 A4

  26. #26
    Senior Member Three Rings RAudiB7A4's Avatar
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    So as it turns out APR Anti-theft somehow enabled itself while I was driving. I have no idea how, because emcs was locked out and the APR mobile dongle wasn't even plugged into the obd2 port. It didn't help that I didn't know I had anti- theft because before APR mobile I never had it but now I have it via the APR mobile app.

    At least it was a cheap (free) fix! Hopefully it doesn't happen again. I guess even a product as polished as APR's has it's bugs.
    APR Stage II B7 A4



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