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 RIP Your Own Question

RIP
RIP, Lead Technician
Category: Honda
Satisfied Customers: 5591
Experience:  Master ASE technician, Honda/Acura aftermarket training, Hybrid training, Adv. level L1
1100518
Type Your Honda Question Here...
RIP is online now
A new question is answered every 9 seconds

Code P0135 on my 97 honda civic, I also checked

Customer Question

Code P0135 on my 97 honda civic, I also checked the voltage coming from the engine side of the harness, but did read any on any of the pins.
Submitted: 7 years ago.
Category: Honda
Expert:  RIP replied 7 years ago.

Michael,

Did you already replace the upstream oxygen sensor, or did you measure the resistance accross the oxygen sensor heater? Thanks,

-Rip

Customer: replied 7 years ago.
I haven't changed anything yet, I got the code pulled and was told that it was a o2 heat circuit problem. I turned the key to the on postion and checked for voltage. Which two pins do you use to read the resistance.
Expert:  RIP replied 7 years ago.

Michael,

It's very common for the o2 sensor's heater to fail and cause this code. On the sensor, depending on what brand it may be, there will be two identical colored wires of the four. There may be (2) white, (2) black, etc. These are your heater wires. Commonly, if you place the meter in ohms, and measure across them while the sensor is disconnected, it will show an open circuit (no reading). This will confirm the oxygen sensor repalcement. Now, if there is another reading, let me know what it is and i'll look up the specification.

-Rip

Customer: replied 7 years ago.
2 black wires, green and a white. From black to black no resistance.
Customer: replied 7 years ago.
should there have been voltage across these to black wire on the engine side of the harness with the key on?
Expert:  RIP replied 7 years ago.

Perfect!, this means bad oxygen sensor. Now, be carefull of the one you purchase. The dealer is the best source but will cost you an arm and a leg. If you purchase aftermarket, or on the internet you may get a bad one, which may cause all sorts of new problems. So, whichever you decide to use, measure the new sensors resistance first, than if your engine runs different after installation, it will entail a defective unit. These sensors are very fragile and at the dealer thy're protected from damage, whereas in the aftermarket they're dropped on the floor, packaged incorrectly, etc. Let me know if you need help after you get the new one in. Also, it's easier and smarter to change the sensor on a cold engine, and make sure you keep the wires away from the exhaust manifold.

-Rip

Sorry, I got your second question a little late. Now, there are a couple of different methods Honda uses to power the heater. You should either have voltage on the engine side connector on the related wires, or connect your meter negative to ground and than probe each terminal with the Ignition on, you should read voltage.

 

RIP, Lead Technician
Category: Honda
Satisfied Customers: 5591
Experience: Master ASE technician, Honda/Acura aftermarket training, Hybrid training, Adv. level L1
RIP and 6 other Honda Specialists are ready to help you
Customer: replied 7 years ago.
I checked from ground post two these to pins and there wasn't any reading. I just want to make sure that I don't buy a $200 o2 sensor and also have another problem, thanks
Expert:  RIP replied 7 years ago.

What about accross the terminals which the black wires would connect? It's rare to have both an open oxygen sensor and a fault in the wires or computer...let me know, thanks.

-Rip

Customer: replied 7 years ago.
Reply to RIP's Post: I just went and checked it again and found that I did have 11.8 volts from one of the black wire to ground, but not across them. The fluke meter that I was using, the probes must not have got to the pin the first time I checked it. And it's freezing outside, so I might have been shaking a litle.
Expert:  RIP replied 7 years ago.

Awesome...good job, it happens. That's what makes you a good technician, to double check your work. I think you'll be just fine after the replacement, and the best part is you saved a bundle on diagnostics.

-Rip

Customer: replied 7 years ago.
Reply to RIP's Post: Thanks for the help.
Expert:  RIP replied 7 years ago.

No problem, and thanks for the bonus, it's very generous.

-Rip

Customer: replied 7 years ago.
Reply to RIP's Post: I also added a bonus thanks again

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:

 
 
 
  • Thank you very much for saving my daughter and her family a lot of money on her Honda. You are definitely on my list for future help. Thanks, again. Fred USA
< Last | Next >
  • Thank you very much for saving my daughter and her family a lot of money on her Honda. You are definitely on my list for future help. Thanks, again. Fred USA
  • I just heard from my mechanic. You were right...a $45.00 job. THANK YOU!! Your response was received in less than 10 minutes!! Linda B. USA
  • Your answers were clear and the diagrams were perfect. Dealer wanted $87 for an hour of labor and even I did it in 15 minutes. Ed USA
  • HONDA PLATINUM was great. I really appreciate his help. I was ready to trade my new Honda until he told me to wait until I got 3,000 miles on it and my gas mileage would get much better. Summer USA
  • I took the Power Steering O-Ring service bulletin linked from JustAnswer to my Acura dealer, and not only did they no-charge the o-ring, they also replaced the power steering pump at no cost. Gary R Stevenson Ranch, CA
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Kyle N.

    Honda Master Tech

    Satisfied Customers:

    3627
    Honda Dealer Tech, ASE Master Auto Tech
< Last | Next >
  • http://ww2.justanswer.com/uploads/hondatech/2010-05-03_025935_resized_work_pic.jpg Kyle N.'s Avatar

    Kyle N.

    Honda Master Tech

    Satisfied Customers:

    3627
    Honda Dealer Tech, ASE Master Auto Tech
  • http://ww2.justanswer.com/uploads/hondacb77/2008-10-27_165606_me3.jpg John G.'s Avatar

    John G.

    Honda Technician

    Satisfied Customers:

    2643
    Dealership tech since 1982. ASE and Honda Master Technician.
  • 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:

    204
    16 years of experience
  • http://ww2.justanswer.com/uploads/FO/fordguy4u/2011-12-17_222940_HPIM1257.64x64.JPG Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    175
    ASE Certified Tech 34 years.
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    Bosch Master Tech

    Satisfied Customers:

    113
    Bosch Certified Master Technician
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Technician

    Satisfied Customers:

    1112
    ASE Master Technician advanced level specialist. Wisconsin certified emissions state inspector
  • http://ww2.justanswer.com/uploads/TH/thebesthonda/2011-1-15_04510_Photo022009005.64x64.jpg thebesthonda's Avatar

    thebesthonda

    ASE MasterTechnician

    Satisfied Customers:

    2299
    26 years experience