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 Dan Your Own Question

Dan
Dan, Technician
Category: Chevy
Satisfied Customers: 21591
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
17871496
Type Your Chevy Question Here...
Dan is online now
A new question is answered every 9 seconds

2002 Chevy cavalier: ABS will engage..traction control..speed sensor

Resolved Question:

2002 Chevy cavalier Auto trans...

'Trac off', 'ABS', and 'service' lights all come on after driving the car a bit. Before they come on, ABS will engage entirely too readily, as well as traction control. Vehicle speed sensor to blame? And is this located on the back of the trans, below the oil filter?

Thanks
Submitted: 5 years ago.
Category: Chevy
Expert:  Dan replied 5 years ago.
This means one of your wheel speed sensors is failing. You can bring vehicle to shop with high end scan tool and they can tell you what sensor. Considering the sensor is not completely failed it will be hard to test without a scantool. You could remove each sensor one at a time and clean mounting area to make sure there is not too large of air gap. Each wheel speed sensor is located diretly behind the wheel it is a 2 wire sensor. Let me know if you have any questions. The vehicle speed sensor is located on the transmission but has nothing to do with abs. Thanks
Customer: replied 5 years ago.
Are there wheel speed sensors for the rear wheels? I removed the front two this morning and made sure I put them back in tight, the area was very clean. Codes still pop up.
Expert:  Dan replied 5 years ago.
The rear wheel speed sensors and rings are integral with the hub and bearing assemblies. If a speed sensor or a ring needs replacement, replace the entire hub and bearing assembly. You will need to bring vehicle to shop so they can monitor wheel speed sensors on scantool and then you can replace the sensor yourself, but there is no way to tell what seensor it is unless the light stays on. Then you can backprobe the wires at the sensor and check for ac voltage while spinning tire. Whatever sensor does not put out ac voltage needs to be replaced. Let me know if there is anything else I can do to help. Thanks
Customer: replied 5 years ago.
Are the fronts seperate? Thank you for your help. I'll tell my dad to get it into the shop.
Expert:  Dan replied 5 years ago.

Yes, front are seperate. Here is a picture.......The sensor gets its readings from the metal ring tht is right behind it. You can also try to clean these rings and wipe them off. If there are metal shavings on them this can set incorrect abs readings. Thanks again.

 

graphic

Customer: replied 5 years ago.
Awesome thanks! First time user of this site... Now in my bookmarks!
Expert:  Dan replied 5 years ago.
I'm happy I was able to help. Thanks again and have a good weekend.
Dan, Technician
Category: Chevy
Satisfied Customers: 21591
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Dan and 4 other Chevy 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 was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • 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 Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics
 
 
 
Chat Now With A Chevy Mechanic
Dan
Dan
Automotive Technician
3314 Satisfied Customers
Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database