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 Steve Your Own Question

Steve
Steve, BMW Expert
Category: BMW
Satisfied Customers: 23484
Experience:  BMW Expert
26942375
Type Your BMW Question Here...
Steve is online now

The auto transmission light on my 525i came on recently

Resolved Question:

Hi, the auto transmission light on my 525i came on recently and feels a little sluggish pulling away in 1st but then drives fine once I'm going. I had a mobile mechanic out to put it on a diagnostic computer which showed codes: P0743, P0700, P0078, P0748 and P0705. The mechanic told me the car seems is saying its in 4th gear when it's supposed to be in neutral or first and suggested I take it to a bmw specialist but I'm a single mum and can't afford to do that so need to have an idea of whether this is going to be worth fixing before I spend any more money on it. The car is a 2000 model and has a gas conversion kit on it. It has also developed a leak through all this wet weather and water is pooling in the back passenger side foot well, the mechanic didn't seem to think this was anything to do with the auto problems. Thanks in advance.
Submitted: 1 year ago.
Category: BMW
Expert:  Steve replied 1 year ago.
What is the mileage. On the vehicle?
Customer: replied 1 year ago.
154,123
Expert:  Steve replied 1 year ago.
Thanks for confirming. What exactly was your question? Whether it is worth fixing or not?
Customer: replied 1 year ago.
I was hoping to find out what the fault codes mean and how expensive it is going to be to fix so I can determine if it will be worth my while taking to bmw specialist
Customer: replied 1 year ago.
The mechanics told me the codes relate to pressure actuators and gear box switch but didn't say what this meant in terms of vehicle being fixed. He told me it was ok to drive but I felt dubious about doing that
Expert:  Steve replied 1 year ago.
I will provide an honest answer. I trust this will be appreciated. Please remember that a low rating PUNISHES me for being honest and that I receive nothing for my time until a positive rating is clicked
P0743 - Torque Converter Clutch Circuit Electrical
P0700 - Transmission Control System (MIL Request)
P0078 - invalid
P0748 - Pressure Control Solenoid 'A' Electrical
P0705 - Transmission Range Sensor 'A' Circuit Malfunction (PRNDL input)
these are generic fault codes and can be misleading as they are not bmw specific and sub optimal for transmission diagnostics
it would appear that you have a problem with the position switch and also possibly multiple solenoid issues or bad valve body and possibly a bad torque converter.
I would say the minimum repair cost will be £800 and could run up to £2500 for a complete rebuild or transmission replacement with a used unit
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.
Customer: replied 1 year ago.
Thanks for your response.In your opinion is the car unsafe to drive?
Expert:  Steve replied 1 year ago.
Please do not forget to click on a positive rating
The car is not unsafe, but you are not doing it any favours driving it in this condition
Please do not forget to click on a positive rating
Expert:  Steve replied 1 year ago.
If there are no additional questions please kindly click on a positive rating
Expert:  Steve replied 1 year ago.
If there are no additional questions, as the question has been answered, please kindly click on a positive rating to ensure I receive proper credit for my time and answer out of the deposit you have already paid
Steve, BMW Expert
Category: BMW
Satisfied Customers: 23484
Experience: BMW Expert
Steve and other BMW Specialists are ready to help you

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • 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
  • 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
  • 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. Jim
  • 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
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Matt

    Matt

    Mechanical Engineer

    Satisfied Customers:

    92
    BEng hons Mech engineering, in auto industry 22 years
< Previous | Next >
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    92
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/Guest/2008-02-15_191551_avatar.jpg Roger's Avatar

    Roger

    BMW Master Tech

    Satisfied Customers:

    2823
    10 yrs. experience as BMW Master Technician, shop foreman and dealer.
  • http://ww2.justanswer.com/uploads/FO/fordtwo/2014-12-19_163422_arrepair.64x64.jpg Robert's Avatar

    Robert

    BMW Technician

    Satisfied Customers:

    82
    Fully qualified 19+yrs exp/self employed technician in the UK
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1089
    Automotive diagnostic tech
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    467
    Licensed diagnostic and repair technician
  • http://ww2.justanswer.com/uploads/RO/RobMechanic/068.64x64.JPG Rob's Avatar

    Rob

    ASE Certified Technician

    Satisfied Customers:

    82
    30 years trade experience