Car

Ask a mechanic online and get answers to your car questions

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

P0740 Code and Engine light on. That code I see it in the…

P0740 Code and Engine...

P0740 Code and Engine light on

Mechanic's Assistant: Has your vehicle stalled? Has anyone run a diagnostic test to pull the trouble code?

That code I see it in the milleage counter when doing the ON/OFF 5 times and also with a scanner

Mechanic's Assistant: What is the model/year of your Jeep?

2001 Grand Cherokee 4.0 6L in line

Mechanic's Assistant: Are you fixing your Grand Cherokee yourself? What have you tried so far?

Nothing yet y first idea was to replace the Torque converter but tht means bringing down the transmission a Trasnmission shop wants to re do the whole transmission

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

What could be the easiest solution without touching the trasnmission

Show More
Show Less
Ask Your Own Car Question
Answered in 15 minutes by:
11/20/2017
David Craig
David Craig, Auto Mechanic
Category: Car
Satisfied Customers: 5,390
Experience: Owner/Mechanic at 3D Automotive
Verified

Hi my name is ***** ***** I'll be more than happy to assist you, Please allow me a few minutes to review your information. Thank you.

Ask Your Own Car Question
Customer reply replied 6 months ago
Sure

there are no other options here with that code. regardless if its the torque converter, bad/worn seals, tcc solenoid or transmission fluid pump. The transmission will need opened up.

Ask Your Own Car Question
Customer reply replied 6 months ago
no, just answer thru here
Customer reply replied 6 months ago
But could it be the solenoids that are located once you open to have the transmission fluid drained? What I mean by not opening the trasnmission, I mean by disconnecting it from the engine and bringing it down. My first thought was on changing the Torque Converter, but now I am thinking if it is better to drain the transmission fluid and replace the solenoids first, before anything else.

sure, it could be the torque converter clutch solenoid,

Ask Your Own Car Question

let me get you the location

Ask Your Own Car Question
Customer reply replied 6 months ago
As per the Manual, the P0740 says the following: Relationship between engine and vehicle speeds indicated failure of torque convertor clutch lock-up system (TCC/PTU solenoid). So I am starting to wonder to replace the solenoids first and at the same time, since that needs to be done, the fluid is drained and replaced with new fluids and filter.
Customer reply replied 6 months ago
AS it talks about the TCC/PTU solenoid. Is this solenid located within the Torque Converter itself in the bell housing, or the solenid that can be reached by opening and draining the fluid?

and that would be the best route to take. you have to drain the fluid and remove the valve body to access the solenoid pack

Ask Your Own Car Question
Customer reply replied 6 months ago
but what are the chances of that the replacement of the solenoid will "erase" the P0740 code?

that solenoid isnt replaceable. the entire valve body needs replaced.

Ask Your Own Car Question
Customer reply replied 6 months ago
the entire valve body needs to be replaced? And how much could it be a new valve body? I know there are 2 to sensors/solenoids that can be replaced, being the Governor Pressure Solenoid one of them.

but not the TCC solenoid. yes the entire valve body would need replaced. Having a shop do the diagnostics that I sent with a DRB3 scan tool can narow down what the problem is instead of hoping.

Ask Your Own Car Question
Customer reply replied 6 months ago
I did scan the code by using a scanner connected to the computer interface (an Axtron ODB II). That gave me the code P0740.

that doesnt do anything except tell you the code. A DRB3 can get inside the TCM and operate all of the solenoids, test the line pressures etc....

Ask Your Own Car Question
Customer reply replied 6 months ago
Got it. And I agree. Any DRB3 you could recommend that is affordable? Understand that the DRB3 should give you the exact symptom/problem and what is the correct step to perform, no?
Customer reply replied 6 months ago
Could it be just draining the fluid and putting new one, as I might have not changed it for around 30K miles?

it could be as simple as a fluid change. absolutely the first thing you can try.

Ask Your Own Car Question

as far as a DRB3 scan tool. its a dealer level scan tool. approximate price, 5,000.00

Ask Your Own Car Question
Customer reply replied 6 months ago
not a tool I can buy unless I really dedicate myself to fixing cars!!! So it will be mainly for dealers and mechanics.

yes. even a used one on ebay is 3,600.00

Ask Your Own Car Question

https://www.ebay.com/i/132376789811?chn=ps&dispctrl=1

Ask Your Own Car Question
Customer reply replied 6 months ago
OK, so going back to my P0740....the first and easy thing is to try replace the trans fluid and filters. Second option would be have a DRB3 scan everything and come up with the exact issue and resolution, since it could be as easy as replacing the valve body or having to bring down the transmission and change the torque valve converter or redo the whole transmission, or replace it with a new one. OR just sell the car!
Customer reply replied 6 months ago
AS it is a car for 2001 with aprox 170K miles, perhaps it is time to change it rather that continue fixing it.

I look at everything as if it were my car. when you start having transmission issues. you start thinking about saying bye bye. but having said that, replacing the fluid has fixed a lot of cars tranny problems.

Ask Your Own Car Question

I dont believe in additives or transmission repair in a bottle either . I leave that up to the customer.

Ask Your Own Car Question
Customer reply replied 6 months ago
I am starting to have that thought and be practical. Try to do a transmission fluid change to see if things improve, else, it is most probably a transmission problem and hence it is time for bye by car and welcome a new one!And agree that when talking about transmission, it is like talking about the engine itself, and better leave it to a professional or say bye bye to car.
Customer reply replied 6 months ago
Because I also don't want to try start experimenting, and for example change the valve body, which is going to cost money, and then find out that the issue still persists. That's why I am doing all this research in order to be sure the best thing to do.

well thought out. With me not being there to be hands on doesnt help either.

Ask Your Own Car Question
Customer reply replied 6 months ago
since it is something that it is not just a $100 dollar fix, but rather something that can be much more, want to be sure what I am doing. And if it is going to be more than $2000, for the car price value for a 2001...better not invest more money on that car.
Customer reply replied 6 months ago
Quick question: what does DRB stand for?

wow, thats one I never had to think about..........

Ask Your Own Car Question
Customer reply replied 6 months ago
bot***** *****ne: with what I told you there i not too much additional information to do. Step 1: try to replace transmission fluid and see if it resolves issue. Step 2: if Step 1 does not work, better get a DRB3 and check the real problem and the correct solution. Step 3: bye bye car!

DRB= Diagnostic Readout Box

Ask Your Own Car Question
Customer reply replied 6 months ago
I think that's all. Any other suggestion or recommendation or even tips?

as for your bot***** *****ne...yes sir

Ask Your Own Car Question

I believe we have covered everything. wish it was easier

Ask Your Own Car Question
Customer reply replied 6 months ago
Than thank you very much for your support and time. IN case something else comes up to you mind that can be helpful or for me to try, let me know.

will do, Please note that customer satisfaction is my number one goal and rating this chat session 3 or more stars will keep the chat open for further follow up questions you may have. Also we can respond in this chat back and forth many times. I may be offline when you respond but I will promptly reply when I return.
Thank you for rating my assistance and for using Just Answer.

David Craig
David Craig, Auto Mechanic
Category: Car
Satisfied Customers: 5,390
Experience: Owner/Mechanic at 3D Automotive
Verified
David Craig and 87 other Car Specialists are ready to help you
Ask your own question now

thank you. happy thanksgiving.

Ask Your Own Car Question
Customer reply replied 6 months ago
Thanks you and happy Thanksgiving.
Was this answer helpful?
Ask David Craig Your Own Question
David Craig
David Craig
David Craig, Auto Mechanic
Category: Car
Satisfied Customers: 5,390
5,390 Satisfied Customers
Experience: Owner/Mechanic at 3D Automotive

David Craig 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

The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

Paul MCorpus Christi, TX

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Technician

1,243 satisfied customers

16 years of experience

Ted G.

Ted G.

ASE Certified Technician

1,724 satisfied customers

20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness

George H.

George H.

ASE Certified Technician

1,537 satisfied customers

ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist

GM Tech (Cam)

GM Tech (Cam)

Auto Service Tech

669 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Amedee

Amedee

Former ASE Master Tech

2,520 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Jerry

Jerry

Master Mechanic

2,181 satisfied customers

ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager

Richard

Richard

ASE Certified Technician

1,000 satisfied customers

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

< Previous | Next >

Related Car Questions
hi, I have a toyota ractis with a cvt gear box. I broke down,
hi, I have a toyota ractis with a cvt gear box. I broke down, it revs and do not move. The mechanic said it could not repair and all he can do is to replace it. Is this true?… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Cadillac DTS: Why does the battery on my 2006 DTS need to be
Why does the battery on my 2006 DTS need to be charged after being fully charged then driven over 50 miles today. I am having dead battery problems when I come out in the morning. This is internment. … read more
jrloar
jrloar
Master HVAC Tech.
Associate Degree
15 satisfied customers
Hyundai Sonata: not, does anyone have a diagram of the fuel pump
Does anyone know of a "fuel cut off switch" in a Hyundai Sonata 2003? If not, does anyone have a diagram of the fuel pump?… read more
George H.
George H.
ASE Certified Technician
Associate Degree
1,537 satisfied customers
My friend wants to sell me her Toyota Prius. How much should
My friend wants to sell me her Toyota Prius. How much should a 2007 Toyota Prius with 200,000 miles on it cost? Thanks.… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
I'm looking to clean up and sell my 2006 M.. S500 4 matic,
I'm looking to clean up and sell my 2006 M.B. S500 4 matic, keep my 2006 Lexus LX 470. I want to buy a OBD2 code reader -scan tool, and want a unit that will test both those 2 vehicles thoroughly as w… read more
Expert
Expert
29 satisfied customers
I own a 426 wedge 420HP 1963 engine. I need to sell it. Can
I own a 426 wedge 420HP 1963 engine. I need to sell it. Can you give me an estimate of price range? I know it's not a mechanical question but I've no luck findirg pricing on the web. Thanks! … read more
kwiggins29059
kwiggins29059
Associate Degree
219 satisfied customers
I have a question about my 2007 Audi A6. I sell used cars
I sell used cars and repair a lot of stuff, but this Audi is out of my league. I have codes for failing high pressure fuel pump. Not sure if the code is related, but the issue is when I am going highway speeds, and presss on the gas a bit harder, say when you are passing a car, the engine just revs high and I continue at the same speed. I am able to slowly work my speed up but cannot accelerate quickly. After some research I am hoping it is just the high pressure fuel pump and maybe also the cam follower underneath the HPFP, but I really don't know. … read more
Shawn Few
Shawn Few
AS
135 satisfied customers
I have my fathers 1962 jaguar XKE AND have to sell it. The
I have my fathers 1962 jaguar XKE AND have to sell it . The body work is done. It needs paint and interior. … read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I am looking to sell my 2005 Subaru Legacy. I was wondering
I am looking to sell my 2005 Subaru Legacy. I was wondering at what mileage should the timing belt be changed? … read more
ggrote1
ggrote1
Vocational, Technical or Trade Scho
13 satisfied customers
I am looking at a 2001 Mustang that someone is selling and I
I am looking at a 2001 Mustang that someone is selling and I was told that the front driver side strut is no good. I was wanting to know if I should replace only the strut or the ball joint, steering … read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
I am interested in buying a used Suburu Outback from sell by
I am interested in buying a used Suburu Outback from sell by owner. It is a 2006 with 148,000 miles. He is asking $6,500 for it. He says it has new tires and new headgaskets, has been taken good care … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,149 satisfied customers
I replaced my a/c compressor. walmart sell freon gas for $5
i replaced my a/c compressor. walmart sell freon gas for $5 and the autodiscount sell it for $11, freon from autodiscount states that is "dupont". is better the expensive because it will be more coole… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
Why is my car engine temperature running low?
Why is my car engine temperature running low? It does not reach the operating temperature. What do I do?… read more
Steve7654
Steve7654
Service Manager/ Technician
4 satisfied customers
car makes..noise stops when I apply the brakes..dealership..squeak
My car makes a high pitch squeeking noise (kind of like when you rub your finger around the rim of a glass that has water in it) while I drive and the noise stops when I apply the brakes. If I drive a… read more
Steve7654
Steve7654
Service Manager/ Technician
4 satisfied customers
What is covered under a powertrain warranty?
What is covered under a powertrain warranty?… read more
GM Tech (Cam)
GM Tech (Cam)
Auto Service Tech
Vocational, Technical or Trade Scho
669 satisfied customers
accidentally put oil treatment into my gasoline tank.
I just accidentally put oil treatment into my gasoline tank. What should I do? Margie… read more
MechanicMan
MechanicMan
High School or GED
478 satisfied customers
Suzuki XL-7 Luxury: Steering hard to steer on turns, smooth
Steering hard to steer on turns, smooth when revening up the motor...Suzuki xl7. 07 with 112k. I am a wholesaler. Bought it knowing it has some issues. The engine was noisy. Mechanic changed the oil p… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
8,789 satisfied customers
how do i change the rear brakes on a 1996 buick regal
i need a step by step process in pushing the cylinder back and if necessary on replacing the whole caliper also… read more
Carhelp4u
Carhelp4u
GM Service Training
2,560 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