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 Randy Your Own Question

Randy
Randy, Auto Specialist
Category: Car
Satisfied Customers: 6007
Experience:  25 Years Experience Automotive Technology.
Type Your Car Question Here...
Randy is online now
A new question is answered every 9 seconds

2002 isuzu ascender: Im working..the check engine light..engine codes

Resolved Question:

I'm working on a 2002 isuzu ascender, the check engine light was on in the car shut down. we had about a dozen engine codes like p0753 p 0758 p 0740. any help in figuring out how to solve this problem would be helpful thank you.
the engine codes were p o 758 p o 753 p 0740 p 0785 p 01516, then again was p0740 p 0753 p 0758 np 0785
Submitted: 2 years ago.
Category: Car
Expert:  Randy replied 2 years ago.

Randy :

I will be glad to help help you figure this out.

Randy :

I have 25 years experience specializing in auto transmissions and detailed technical support.

Randy :

Give me just a moment and I will check on this for you.

Customer: great thanks!
Randy :

I ran a check on those codes and they are all Transmission related, however it is not likely to have that many problems at one time unless there has been a hot to ground problem such as jumping the battery and crossing the cables or something that would send 12 volts into body ground. I can give you some things to check that would cause a multiple DTC set however I from my experience and research on this particular vehicle the one I would check first is the TPS.

Randy :

The code 1516 does lead to Throttle Position Sensor- Mass Air Flow Correlation Error.

Randy :

All the other codes are shift solenoid errors.

Randy :

In my experience I have never seen any of those codes cause a complete engine shut down which leads me to believe that something out of the ordinary has happened. The only way to be sure and certain you find the cause is to do a very thorough in depth test and diagnostic procedure. I will be glad to give you the schematics and test procedures.

Customer: okay any help is appreciated. how can I check the tps
Randy :

Do you have scan tool.

Customer: okay the plot thickens some more information. last week he had complained of the car being hard to turn at low speeds. he discovered that he had been driving inXXXXXfor almost a week and didn' realize it.
Randy :

I can you give you steps to check with a voltmeter, it is a little more difficult.

Customer: I have a scan tool that gives that will give freeze frame data
Randy :

Yes that will be good. The way to check the TPS is in datastream mode. Watch the Throttle Position Sensor while you press the accelerator pedal slowly it should go from 0.5% to 98% gradually. Give me a little more time and I will give you complete diagnostic procedure, it will probably save you time in the long run.

Customer: that would be great I really appreciate your help. we are going to call it quits for today but will be working on it tomorrow as well
Randy :

Great. I will get that posted for you.

Customer:

It would be great if I could have the complete procedure to print up before I leave home tomorrow. So much easier than trying to read it off my phone. Thanks

Randy :

No problem. Can you print PDF download.

Randy :

If you want to replace TPS, you can do that instead of running these test. There is no gaurantee that it will fix it but sometimes it is cheaper than spending several hours on test. I cant be positive but I think if it were me I would replace TPS and if that did not fix it I would replace PCM.

Customer: thanks so much for all your help I will give it a go today but it does look like the tps . I'll let you know either way thanks again
Customer: Update, It was the TPS. Thanks!!
Expert:  Randy replied 2 years ago.
What Happens Now?

Your chat has ended, but you can still work with your Expert to get an answer to your question if you have not yet received one.

Come back to this page at any time to see additional information from your Expert.  You will also receive an email when your question is updated.  If you want to send a message to your Expert, use the box below.

If you have already received a satisfactory answer to your question, click the Accept button above.  Experts are credited for each accepted answer they provide.
Expert:  replied 2 years ago.
I am glad to help. If you need anything just let me know.
Randy, Auto Specialist
Category: Car
Satisfied Customers: 6007
Experience: 25 Years Experience Automotive Technology.
Randy and 3 other Car Specialists are ready to help you
Customer: replied 2 years ago.
Update- It was the TPS. Thanks!!
Expert:  Randy replied 2 years ago.
Your welcome! Glad to help!

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 P Elm City, NC
< Last | 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, Frank...you 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)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician