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 Ron Z. Your Own Question

Ron Z.
Ron Z., - Chevy Tech -
Category: Chevy
Satisfied Customers: 14048
Experience:  18+yrs experience. State Inspector and Chevy Diagnostics
Type Your Chevy Question Here...
Ron Z. is online now
A new question is answered every 9 seconds

2005 Chevy Tahoe: warning..the gas cap is loose..check engine light

Resolved Question:

My 2005 Chevy Tahoe keeps warning me that the gas cap is loose. At least twice a week it warns me of this. Now the check engine light has come on and I know it's because of the gas cap. It's happened before and I was charged $80 from the dealer to reset the light and to perform all kinds of useless tests. They blame for not tightening the gas cap, but I do tighten it and the gas cap warning comes on even after I've pulled over and tightened it. What's going on??
Submitted: 4 years ago.
Category: Chevy
Expert:  Ron Z. replied 4 years ago.

 

The gascap light, believe it or not, is NOT just for a loose gas cap. This light will come on whenever there is a problem in the EVAP (emissions) system. Your best bet is to have the codes read from the computer the next time the light comes on. To avoid the $80 diagnostic fee, you can go to any local Auto Zone location, and they will read the codes for Free. Once you have these codes you can more accurately and efficiently diagnose which sensor/part in the emissions system is faulty, and make the repair. If you need help with the diagnostic, you can bring that code to any of our Techs here and they can guide you through the diagnostic procedure.

 

Customer: replied 4 years ago.

When I spent the $80 at the dealership for the diagnostic fee they did diagnose which sensor in the emissions system was faulty. the guy read it off to me (I didn't actually understand it) but the Manager told me that my gas cap had been loose for 144 miles which was the reason for the check engine light coming on. So what's the point of having this completed again at Auto Zone if the dealer already completed it? I guess I'm wondering is it possible that the gas cap not sealing the way it's supposed to? I have been the only owner of the vehicle and bought it new in 2005 and this has never happened before.

Expert:  Ron Z. replied 4 years ago.

 

If the gascap has not been replaced yet, then yes, it is a possibility. When replacing the gas cap, it is recommended that you use one that is OEM specs (as opposed to an Auto Zone cheapy.). If this does not solve the problem, i'm simply stating there are other parts/sensors that will set off this light and to save money, gathering the p-code at Auto Zone for Free is the way to go.

 

Ron Z., - Chevy Tech -
Category: Chevy
Satisfied Customers: 14048
Experience: 18+yrs experience. State Inspector and Chevy Diagnostics
Ron Z. and 14 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