VW

Have Volkswagen Questions? Ask an Expert Now.

Ask an Expert,
Get an Answer ASAP!

VW
This answer was rated:

I have a 2001 VW Beetle and the EPC light keeps coming on and

I lose power, then if...
I have a 2001 VW Beetle and the EPC light keeps coming on and I lose power, then if I shut it off and restart it,,,it revs to +5000 rpms and I have to shut it off again. Sometimes it resets itself and is OK for a while. The error code indicates the TPS...could static buildup cause electrical interference with the computer/sensors and would a static strip help?
Show More
Show Less
Ask Your Own VW Question
Answered in 15 minutes by:
3/23/2010
gomi_otaku
gomi_otaku, VW Technician
Category: VW
Satisfied Customers: 3,466
Experience: VW FastTrack '00-'01, VW Academy Chicago and Seattle '00-present, VW Certified
Verified
More likely you have a problem at your throttle body. I recommend taking it off and cleaning it thoroughly, clearing the faults, and disconnecting the battery and holding the cables touching for about 10-20 seconds to reset the modules.
Ask Your Own VW Question
Customer reply replied 7 years ago
Holding what cable to where?
Customer reply replied 7 years ago
Mind if I have my mechanic try this before payment is sent? If it works, I will happily send double what I agreed to.
Customer reply replied 7 years ago
My mechanic followed your instructions to the letter and got absolutely no difference in the way it is acting. He asked me to tell you that both the throttle body as well as the sensor on the gas pedal are electrical sensor modules, in case you were unaware that the '01 was different fron the '00. Any further suggesions?
Yes, I know, I am a VW dealership mechanic. I wouldn't have replaced the pedal assembly, we have almost NEVER seen those fail. It sounds like your down to running a wiring overlay harness, at least temporarily to test the system.
Ask Your Own VW Question
Customer reply replied 7 years ago
Is that wiring overlay harness available only from a dealership and how costly is it to perform? Is it something a good "backyard" mechanic can do? Sorry to delay this...but we are grabbing at straws over this. It is very frustrating because I only recently purchased the car from a usd car dealership and they are trying their best to repair it, but the error codes are giving us fits. Again...if you can assist us in finding a solution, I will gladly double or triple the originally agreed price to pay you.

I don't mean replacing the whole body harness, I mean just running a set of replacement wires to the throttle body. At the dealership we have a selection of wire ends that we can replace into the electrical connectors and just splice in the length of bulk wire that is needed. That way the original harness is still intact and can be reinstalled if the overlay does not have any effect.

Ask Your Own VW Question
Customer reply replied 7 years ago
The codes that are showing up are for the Throttle Position Activator which is on the side of the throttle body. Can that be replaced or do you need the whole throttle body? Or is there some other method to repair this. The error codes for the pedal can now be cleared but the Activator code will not clear.
Customer reply replied 7 years ago
My mechanic also tells me that after shutting the car off and restarting, the EPC codes for the accelerator comes right back...even though they will clear...the error code numbers are : PO638 Throttle Activator Bank 1 and the pedal codes are PO121 and PO1221. Code PO 638 will not clear. Could the TPA code be what is causing the pedal codes to pop up and cause all the problems with power loss, high revs and/or surging?
Yes, those are going to definitely be related. It could be that you have a problem with the wiring between the pedal assembly and the throttle body- since this is "throttle by wire" you don't have an accelerator cable anymore, it depends on the pedal position to dicate the throttle opening. There are two circuits, that cross reference each other- one goes progressively upward, while the other goes progressively downward. If one circuit fails it takes the input for the other circuit (redundant inputs)
Ask Your Own VW Question
Customer reply replied 7 years ago
I will see what he can do...but is this normally a dealership issue or could it be done by a mechanic who thinks he can trace the wiring and test it out? Also....since none of this has worked thus far...do you have any objection if I ask anoyher "expert" and see if he can offer anything more? I will retain your info for reference and as indicated, will pay you when resolution happens if your advice lef to the solution. Thank you for your advice so far and I may very well come back to you for more before I send your money.

Yes- you can post up another question, or if you want I can opt out on this one and another expert may post up. It's more likely to get a response with an additional thread as people don't like to step on a question that already has an answer

 

Ask Your Own VW Question
Customer reply replied 7 years ago
I noticed today that a PayPal payment of $15.00 was taken from my account...I am assuming it was for you. No problem with that. Thank you your help...in fact my mechanic, by using a Throttle Box from a VW Golf they had, fixed the problem,,,it was the throttle box all the time. So...even though your advice was slightly off....it led to a resolution...so thanks again. Hope this helps you in future.

Thanks for the update- the throttle body was what was setting the fault, cleaning it and resetting the faults will usually clear it out.

The $15 is simply a transfer to this site, we as techs don't get paid unless you are satisfied and hit the "accept" button on the answer.

gomi_otaku
gomi_otaku, VW Technician
Category: VW
Satisfied Customers: 3,466
Experience: VW FastTrack '00-'01, VW Academy Chicago and Seattle '00-present, VW Certified
Verified
gomi_otaku and 87 other VW Specialists are ready to help you
Ask your own question now
Customer reply replied 7 years ago
Done....but cleaning it did nt fix it....it had to be replaced...but it is working fine now....thanks and good luck in future
Ask gomi_otaku Your Own Question
gomi_otaku
gomi_otaku
gomi_otaku, VW Technician
Category: VW
Satisfied Customers: 3,466
3,466 Satisfied Customers
Experience: VW FastTrack '00-'01, VW Academy Chicago and Seattle '00-present, VW Certified

gomi_otaku is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

vwnewton

vwnewton

VW Owner,ASE Master and L1 Advanced

307 satisfied customers

25 years of VW obsession turned into a job, last 15 years as a VW Tech.

VWDoc

VWDoc

Independent VW Shop owner

1,738 satisfied customers

20 years of experience working with VW's. Independent European shop owner and technician.

Martin

Martin

auto electrical

776 satisfied customers

South African Trade Diploma in Auto Electrical

Matt

Matt

Engineer

683 satisfied customers

Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

482 satisfied customers

Have owned a repair shop for 25 yrs.

Tim Mohr

Tim Mohr

ASE MASTER TECH

411 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Chris(aka-Moose)

Chris(aka-Moose)

VW Technician

274 satisfied customers

16 years of experience

< Previous | Next >

Related VW Questions
My climate controller doesn't blow air on any level. About a
My climate controller doesn't blow air on any level … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Chech engine light has been on since i got the car, p0341
chech engine light has been on since i got the car, p0341 have replaced camshaft positon sensor , coolent temp sensor, all timing parts and cooling system. … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Just finishing replacement of the brake master cylinder and
just finishing replacement of the brake master cylinder and brake booster. When i reconnected the battery, the brake tail lights came on & stay on. I messed with the switch on the brake pedal, but pus… read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Well when he warms up it won't shift into 3rd 4th 5th or 6th
Well when he warms up it won't shift into 3rd 4th 5th or 6th Gear it's lips … read more
Martin
Martin
auto electrical
Vocational, Technical or Trade Scho
776 satisfied customers
All my instrument trouble lights are on in my 2014 VM Jetta
all my instrument trouble lights are on in my 2014 VM Jetta SE, Cannot reset them … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
2011 JEDDA SE (GAS) window washer pump/wiper blades combo
2011 JEDDA SE (GAS)window washer pump/wiper blades combo not operating.Wiper blades operate when used independently. Tried to use pump and fluid did not come out but could hear pump while i was drivin… read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Just replaced the inner CV boot of my 06 TDI golf. i have a
Just replaced the inner CV boot of my 06 TDI golf. i have a vibration coming from the front passenger side that I assume is related to the boot change. Not sure of the cause. Nil adjustment to tie rod… read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
I need fuse box layout and fuse # for low beam headlights on
I need fuse box layout and fuse # for low beam headlights on 2012 vw beetle … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
I can't identify fuses on my Jetta. But I can't find
Yes but I can't find anything related to fuses diagrams … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Tengo un golf 2.0 4 mk4 2001 prende muy bien pero al
Tengo un golf 2.0 4 mk4 2001 prende muy bien pero al acelerarlo estando parado no sube más de 3000 revoluciones y también cuando lo estoy corriendo me hace lo mismo y como es automático no me hace los… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My check engine light is flashing and my car shakes a little
My check engine light is flashing and my car shakes a little when in park … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Did a smoke test, smoke coming from between engine and
did a smoke test, smoke coming from between engine and transmission vehicle is a 2009 golf gti … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
108 satisfied customers
2012 passat 2.5l low oil pressure. installed a mechanical
2012 passat 2.5l low oil pressure. installed a mechanical gage. reads approx 15 lbs. at warm idle. … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
Alarm system on my 2013 VW Jetta 2.5SE is locked on and I. I
Alarm system on my 2013 VW Jetta 2.5SE is locked on and I … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,442 satisfied customers
I have a 2003 vw convertible. What size are the T20 torx
I have a 2003 vw convertible. What size are the T20 torx screws that fit the bottom of the interior door liner? … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
I hear a light rattling sound around the top of the engine
I hear a light rattling sound around the top of the engine that may be a timing chain problem but I don't know how to test it. I checked the belt tensioner and it is fine. … read more
Matt
Matt
Engineer
Bachelor's Degree
683 satisfied customers
I have a Jetta 2015 GLi. The engine just stopped. I brought
I have a Jetta 2015 GLi. The engine just stopped. I brought it to the dealer who said it was a timing chain problem and they need to replace the entire engine for $3,000+ labor not included. Are there… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I want to do an engine and tranny swap from my 2005 Jetta
I want to do an engine and tranny swap from my 2005 Jetta TDI MK4 manual tranny to a Jetta Wagon. What components would need to get swapped over in order to make this happen? Also what years would be … read more
kyle swart
kyle swart
Certificate Of Completion, Automotive Technology
157 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x