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    Thread: EPC light?

    1. 08-12-2006 11:43 AM #1
      The Electronic Power Control light in my 1999.5 Jetta GLS VR6 came on a day or two ago. Now it hesitates like crazy even after I've already pulled out and am trying to accelerate. Is there any common problem/malfunction that would cause the light to come on, and is there any correlation between the light and this symptom? Also, the check engine light came on, if that helps.
      Thanks for your help!
      Fred

    2. Member 84veedub's Avatar
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      08-12-2006 11:48 AM #2
      If you search around I think this has been covered in detail about early mk4s and the EPC light.
      -Graham

    3. Senior Member bluefox280's Avatar
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      08-12-2006 02:09 PM #3
      You need to SCAN the ECU with a VAG-COM to get the fault codes from the ECU.
      We cannot diagnose a Check Engine Light (CEL) or Electronic Power Control (EPC) light until we have fault codes.
      - Erik
      PatternDraftImaging.com - "...Where Engineering Discipline and Photography Merge as One..."

    4. 08-12-2006 02:43 PM #4
      change the MAF!!!!!!!

      also are u runing a CAI and is the ASR light on as well???
      let me know

    5. 08-12-2006 11:28 PM #5
      No, the ASR light is not on. I took it to AutoZone, and they scanned it (that engine diagnostic tool) and it says that I need a new O2 sensor and a new speed sensor. Does this make sense?

    6. 08-12-2006 11:29 PM #6
      I don't know if they would help, but I also have the codes he used to find that it needs an O2 sensor and speed sensor.

    7. Senior Member bluefox280's Avatar
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      08-13-2006 10:24 AM #7
      Quote, originally posted by zigman07 »
      Does this make sense?

      Do you have the EXACT code numbers from that scanning?
      Those will directly tell what's wrong with the vehicle.
      - Erik
      PatternDraftImaging.com - "...Where Engineering Discipline and Photography Merge as One..."

    8. 08-13-2006 10:30 AM #8
      speed sensor. had the same problem

    9. 08-13-2006 10:47 AM #9
      My EPC light has been on for weeks, and my brake lights werent even going on before...now they wont turn off! even when i turn off my car theyre still on, so i have to take out the fuse. i got my vag com yesterday, and theres no port in my laptop to hook it up to...looks like im going to have to hook it up to a tower

    10. 08-13-2006 09:50 PM #10
      Quote, originally posted by bluefox280 »
      Do you have the EXACT code numbers from that scanning?
      Those will directly tell what's wrong with the vehicle.
      - Erik

      Yes I do have the exact codes.

    11. Member vr fix's Avatar
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      08-14-2006 12:08 AM #11
      Dude its your brake light switch probally, get it at an autoparts store....been there, do scan for codes, could be something else....gl

    12. Senior Member bluefox280's Avatar
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      08-14-2006 10:02 AM #12
      Quote, originally posted by zigman07 »
      Yes I do have the exact codes.

      Excellent; post those exact numbers and we'll be able to help you out specifically.
      - Erik
      PatternDraftImaging.com - "...Where Engineering Discipline and Photography Merge as One..."

    13. 08-14-2006 01:45 PM #13
      I had the same problem EPC light and the CEL I do not remember the exact codes but the car was doing the same thing. I replaced the MAF and it did not change then I replaced the O2 sensor. That did not do any thing; I did spark plugs and a bunch of other things. I finally replaced the Throttle body and that took care of the hesitation but I still some times get the EPC light. I still have the CEL the EPC light only comes on under hard acceleration.


      Modified by blackjackT7 at 10:47 AM 8-14-2006

    14. 08-15-2006 10:34 AM #14
      can advanced auto scan our cars? i thought they didnt have a vag com

    15. 08-15-2006 10:39 AM #15
      Quote, originally posted by tywall3 »
      can advanced auto scan our cars? i thought they didnt have a vag com

      they don't. furthermore, the codes are different.
      ---- tywall3-----
      it sounds like you should start with the brake light switch. it is only about $12 and is an obvious fix for the brakelights not turning off.
      -----------------
      I would strongly recommend scanning it with VAG-COM and giving us the codes. Much more accurate than an autoparts store.

      Oh, by the way, make sure the wireing harness on your MAF is plugged in. That is another simple thing to check that would potentially cause these symptoms.....It could be quite a few things, but it kind of sounds like a bad MAF.
      ..but get those codes. [IMG]http://**********************/smile/emthup.gif[/IMG]




      Modified by 18Tdesign at 7:44 AM 8-15-2006

    16. 08-15-2006 08:20 PM #16
      thanks man...ill go get a brake light switch tomorrow....where is the maf located?

    17. 08-19-2006 10:09 PM #17
      Quote, originally posted by tywall3 »
      thanks man...ill go get a brake light switch tomorrow....where is the maf located?

      it's in the big plastic cylinder behind the air box. there is a wire harness plugged into it.

    18. Member 84veedub's Avatar
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      08-24-2006 03:59 PM #18
      Quote, originally posted by tywall3 »
      thanks man...ill go get a brake light switch tomorrow....where is the maf located?

      I just bought my brake light switch, it was $8 ,same problem.
      -Graham

    19. Member JIMMYJOEGG's Avatar
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      08-24-2006 04:09 PM #19
      Quote, originally posted by tywall3 »
      thanks man...ill go get a brake light switch tomorrow....where is the maf located?

      I believe the switch it covered under a recall, they replaced mine for free due to a recall on the switch.....I had the same problem.

    20. 08-24-2006 04:26 PM #20
      my EPC light came on, i read the DIY on how to repair the brake light switch, did that, works like a champ with no EPC light.

    21. Member 84veedub's Avatar
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      08-25-2006 01:12 PM #21
      Quote, originally posted by JIMMYJOEGG »
      I believe the switch it covered under a recall, they replaced mine for free due to a recall on the switch.....I had the same problem.

      I have had very little success with the dealerships around me, I just said for $8 and a few minutes of my time, I'd rather put it in.
      -Graham

    22. 08-25-2006 01:14 PM #22
      Quote, originally posted by truegeforce »
      change the MAF!!!!!!!

      also are u runing a CAI and is the ASR light on as well???
      let me know

      No -- don't just start changing parts hoping you stumble across the problem

    23. 08-25-2006 01:27 PM #23
      Quote, originally posted by felkadelic »
      No -- don't just start changing parts hoping you stumble across the problem
      [IMG]http://**********************/smile/emthup.gif[/IMG] what he said. we have sensors for a reason

    24. 08-25-2006 05:01 PM #24
      Im waiting for splisks to put my fault codes online (cause he scanned my car for me)...but I just replaced my break light switch, which i though was the problem....and my break lights are still on! ahhhhhhhhhh


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