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: 21583
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

What makes a 1998 chevy cheyenne check engine light show code 0131

Resolved Question:

what makes a 1998 chevy cheyenne check engine light show code 0131
Submitted: 3 years ago.
Category: Chevy
Expert:  Dan replied 3 years ago.
Welcome to JustAnswer, my name is XXXXX XXXXX I'm here to help get your problem resolved. Ask follow up questions, thanks. I've sean this often caused by a failing mass airflow sensor, clogged fuel filter, weak fuel pump, and oxygen sensor. Monitor fuel pressure and make sure that under a load or during the problem, fuel pressure is going over 60 PSi, check for vacuum leaks and clean maf with cleaner from parts store.

P0131 Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
Possible CausesSetting Conditions
  • Check for air leaks in the exhaust manifold or in the exhaust pipes
  • Check for air leaks in the intake manifold and in related vacuum lines
  • Engine misfire condition present (look for P0300 series codes)
  • Fuel system too lean (possible low fuel pressure, water in fuel)
  • HO2S connector is damaged (check pins for damage, and for moisture)
  • HO2S signal circuit is shorted to ground
  • HO2S is damaged (i.e., cracked) or air reference hole clogged
  • PCM has failed
DTC P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P022, P0123, P0200, P0300, P0401, P0404, P0405, P0440, P0442, P0446, P0452, P0453, P1120, P1125, P1220, P1221, P1258, P1404, P1441, P1514, P1515, P1516, P1517 and P1518 not set; engine running in Closed Loop, fuel level over 10%, system voltage over 10v, TP angle from 8-50%, or on models with TAC, the APP sensor indicated angle from 3-70%, MAP signal more than 25 kPa, Intrusive and Scan Tool tests not enabled, then with the Lean Test enabled, the PCM detected the HO2S signal was less than 200 mv for 50 seconds; or during the P/E Mode test, the PCM detected the HO2S signal was less than 360 mv for 10 seconds.

This code sets in 2 Trip(s).
This code will turn on the MIL (Malfunction Indicator Lamp)
Customer: replied 3 years ago.
how can i tell if it is the maf
Expert:  Dan replied 3 years ago.
If it runs rough you can see if it runs better disconnected if so its probably dirty or bad, otherwise no easy way to test..But it usually sets other codes so I'd replace that if fuel pressure is good, no exhaust/vacuum leaks, injector cleaner doesnt help, and oxygen sensor doenst help.
Dan, Technician
Category: Chevy
Satisfied Customers: 21583
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Dan and 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
Chevy Mechanic
21583 Satisfied Customers
Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database