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 Gary Your Own Question

Gary
Gary, Technician
Category: Car
Satisfied Customers: 10689
Experience:  GM master tech for 15 years/ASE master tech for 20 years
19513769
Type Your Car Question Here...
Gary is online now
A new question is answered every 9 seconds

Security Light Flashing Code P2948 How To Get The Light Ou

Resolved Question:

Security Light Flashing Code P2948 How To Get The Light Out.
Submitted: 1 year ago.
Category: Car
Expert:  transman replied 1 year ago.

transman :

Hi can you tell me the model , make and year ?

JACUSTOMER-edg9bw3a- :

2000 Chev S10 Pick-up 2.2 L

JACUSTOMER-edg9bw3a- :

Has DTC B2948

transman :

ok give me two minutes

JACUSTOMER-edg9bw3a- :

You still there?

transman :

sorry for the delay was there a key replace or a body computer replace on this vehicle?

transman :

at this moment you have a problem with the body computer ascepting the key transponder located on the key.

transman :

this can happen when the transponder diode on the key is worn weak or broken ,and when the body computer or the engine controller has been replase.

transman :

to reset this you will need a new key with the new transponder key and a scanner to progranm it in to your BCM and PCM.

JACUSTOMER-edg9bw3a- :

Ok no parts have been replaced, except the timing chain had jumped.A year ago I had a DTC B2947 The passlock sensor was not getting the 12v from the BCM. I gave it 12v from an ignition on source and it worked fine untill we changed the timing chain. I have tried the other spare key same thing. You think I can change the BCM for a used one and then do the 'password XXXXX"?

JACUSTOMER-edg9bw3a- :

Hello, anybody home???

JACUSTOMER-edg9bw3a- :

Hello. where is the answer

Expert:  Virtual Technician replied 1 year ago.

Hello,
My name is XXXXX XXXXX I will try my best to help you with your vehicle issue.

Sometimes internet connection or computer issues or converting a conversation from chat to Question & Answer bounces the expert off the site and we have to "reset".

Please hold tight for transman to get back to you.

He is automatically notified when you post a question on this thread.

Please don't respond back to this message as it will "lock" the question to me.

Thanks for your patience,

Rich

Expert:  transman replied 1 year ago.
Hi sorry i lost you last night i don't know what happen but here i am, if you had to provide the 12volts to the key sensor then the body computer is at fault and needs replacement ,bypassing the body computer works ok until you had to disconnect the battery for more then one hour this will drain all capacitors keeping memory alive and reset everything again and at this point you would need the rolling code # XXXXX be reprogram back in to the body computer but if you have no power output from the body computer then you will need one, i will suggest to remove the bypass to the key sensor and replace the body computer and then reset the security system as follows on the next page.
Expert:  transman replied 1 year ago.
wans you replace the body computer open the drivers side door and lock all other doors insert the key to the ignition turn the key to on leave the key to the on position for one hour you will need to maintain the battery charge for this period of time with a charger at low charge, then after one hour open the door turn the key to the off then turn ot start.
Customer: replied 1 year ago.

So can I use, a used BCM, and do the relearn procedure? Remember now, I'm getting a DTC B2948. When i measured the voltage on circuit 1836 i was getting 5V. So, is it the BCM, or the passlock sensor ?? Or Both. Can we use, used parts????

Customer: replied 1 year ago.

My last question was, can I use, a used BCM, and do the password XXXXX procedure?

Customer: replied 1 year ago.
Relist: Inaccurate answer.
I want to know if I can use, a used BCM, and perform the relearn procedure.
Expert:  Gary replied 1 year ago.
new expert here did you still need help ?
Customer: replied 1 year ago.

Yes I need some answers to my questions,


 

Expert:  Gary replied 1 year ago.

yes you can use a used BCM BUT ! the used BCM must be programed with a scan tool to the VIN number of your truck and set up with a scan tool

the VIN number and set up will not work without reprograming it to the trucks VIN number

hands down this truck either has bad wires from the BCM to the passlock sensor,bad passlock sensor or a bad BCM

the testing for the 12 volts from red/white wire testing at the passlock connector with it unplugged on the harness side wires

you must use a multi meter with a MIN MAX you need to set the MIN MAX peak to I millisecond then run the record on the meter and shut the key off see if it reads close to 0 volts the problem is the passlock sensor

if it reads more than 0 volts then either the wires to the BCM are bad or the BCM is bad

if it reads 0 all the time

Gary, Technician
Category: Car
Satisfied Customers: 10689
Experience: GM master tech for 15 years/ASE master tech for 20 years
Gary and 4 other Car Specialists are ready to help you

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