How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Pete Your Own Question
Pete, Technician
Category: Car
Satisfied Customers: 23886
Experience:  17 years automotive training and experience.
Type Your Car Question Here...
Pete is online now
A new question is answered every 9 seconds

Audi A6 Quattro: 2004 A6 Quattro 2.7T. Limp Mode

This answer was rated:

2004 A6 Quattro 2.7T. 118,000. I work at a Ford dealer. Brought the car into the wash rack for 45 minutes before I left work. Started it up to back out, tranny slammed into reverse, shift selector was all red but NO check engine or other lights - in limp mode. Limped down the street about a half mile and did a complete shutdown/restart and then it ran perfectly. Don't know if if it's connected but feeling some minor rear end "flutter" or "wobble" shifting between 3rd and 4th (AutoTiptronic) when it's cold but otherwise the car runs and drives great. Car has NOT had a tranny flush and fluid replace. Torque Convertor was replaced in 2010 at 98,000. Any ideas for me?

My name is XXXXX XXXXX I am a professional here at Just Answer/Pearl. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

If the vehicle was washed including the under carriage I would check and make sure no wiring is wet at any connection/connector.I have seen in some cases where connectors can take in water and cause the wiring to short and can cause a fault like this here.This sounds like an electrical issue since you were able to cycle the key off and then back on and the main part of the faults were corrected.

I would also double check and make sure nothing is bent or damaged under the vehicle if this was put up on a hoist or rack as a bent component may be causing issues with the vehicle speed sensor or possibly other sensors like wheel speed sensors.

Thanks Pete
Customer: replied 2 years ago.

Hi Pete, Thanks for the reply. I did not wash the underside. The car was in the shop in August for an inspection and nothing visual was found but the tech drove the car and felt a vibration in the rear and suggested it could be a bent or unbalanced drive shaft. The limp mode thing happened last year, too. After 10 hours sitting outside in wind and frigid temps it went into this limp mode. On that occasion it would barely move forward but after about 20 minutes idling, it was fine. This time was strange because when I started it to bring it inside, it started fine and was not in limp mode. As I mentioned, no check engine or other warning lights, just the RED shift selector indicating limp. Can a dirty or clogged transmission filter on a cold start cause the limp mode?

If the engine is running and revving up properly when this fault occurs and the only fault is the vehicle doesn't want to move or shift properly when this occurs then this can be a restricted transmission filter in some cases.It may also be a fault with debris build up in the transmission itself as I have seen and have had to perform transmission flushes for in the past to correct.You might start with a transmission flush and then change out the filter and see if this corrects the fault.

Thanks Pete
Pete, Technician
Category: Car
Satisfied Customers: 23886
Experience: 17 years automotive training and experience.
Pete and 7 other Car Specialists are ready to help you
Customer: replied 2 years ago.

I appreciate that and was thinking the same thing myself about the flush and filter. I didn't buy the bent or unbalanced drive shaft either, since it only happens now and then - especially on cold starts. The tranny flush and filter is the best bet, first, I agree. I will give you a good rating for the advise :-) It took about 4 hours or more for someone to get to me, though. :- l Thanks.

I apologize for the delay.I replied as soon as I saw your question.I hope you can get this resolved with ease.I don't think you have anything bent since the problem comes and goes like this,if you did the problem would be there all of the time.

Thanks Pete

I am following up with you to see if you still needed help with your question you had asked.If my help didn't satisfy your question please let me know so we can continue.

Thanks Pete

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... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...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 P Elm City, NC
< Previous | Next >
  • 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 P Elm 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. Phil Marysville, 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. Charles Walnut 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!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA

Meet The Experts:

  • Chris (aka-Moose)

    Chris (aka-Moose)


    Satisfied Customers:

    16 years of experience
< Last | Next >
  • Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)


    Satisfied Customers:

    16 years of experience
  • Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • GM Tech (Cam)'s Avatar

    GM Tech (Cam)

    Auto Service Tech

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years experience.
  • Amedee's Avatar


    Former ASE Master Tech

    Satisfied Customers:

    ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
  • Jerry's Avatar


    Master Mechanic

    Satisfied Customers:

    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes