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Oxygen sensor location(s) for replacement?

Tiny
PETER PATTERSON
  • MEMBER
  • 2010 HONDA ACCORD
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 155,254 MILES
Just need to know where they are and which is b1 and b2? That is all they told me when I had it scanned.
Thursday, October 10th, 2019 AT 12:12 PM

40 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

I attached a picture of the sensor locations for you to view and a guide to help walk you through the repairs with diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

What are the codes? Rarely O2 sensor codes require replacement of the actual sensor.

Roy
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Thursday, October 10th, 2019 AT 2:42 PM
Tiny
PETER PATTERSON
  • MEMBER
  • 2 POSTS
P0430 theshold B2
p0420 theshold B1
p0430 theshold B2
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Thursday, October 10th, 2019 AT 4:30 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, you need catalytic converters. The precious metals are worn out in the converters. It is not the sensors at all, it is the catalytic converters.
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Thursday, October 10th, 2019 AT 4:44 PM
Tiny
JERRYJIMENEZ36
  • MEMBER
  • 5 POSTS
  • 2007 HONDA ACCORD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 50,000 MILES
I have had P0154 P0135 I have replaced those sensors with honda sensors. The check engine light is still on. I took it to a shop and they told me they could not find the problem. They tested the sensors and there in good condition they said the problem could be because there is no power to my oxtgen sensors. Is there a fuse Relay someplace that I can check? Or is there something else there can be checked?
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Friday, June 25th, 2021 AT 9:35 AM (Merged)
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok for code P0135 check these fuses. Fuse number 4 (af sensor) 15 amp in the fuse box under dash. Fuse number 19 40 amp in the fuse box under the hood. Fuse number 23 7.5 amp in fuse box under dash. This could also be what is causing the P0154 code too. Let me know what you find and we will go from there. Here is how you can change the sensor in the diagrams below.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below). Please let us know what happens.
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Friday, June 25th, 2021 AT 9:35 AM (Merged)
Tiny
JERRYJIMENEZ36
  • MEMBER
  • 5 POSTS
I checked all there all fine. :/
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Friday, June 25th, 2021 AT 9:35 AM (Merged)
Tiny
JERRYJIMENEZ36
  • MEMBER
  • 5 POSTS
I tried checking all those fuses and they are all in working condition. What else could it be?
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Friday, June 25th, 2021 AT 9:35 AM (Merged)
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok now I need you to unplug the mass air flow sensor and use the pic below to check ohms between term 3 and 4 on the sensor not the wiring harness. Is the ohms between 2.1 and 2.9? If not then replace the mass air flow meter.


https://www.2carpros.com/forum/automotive_pictures/249564_Graphic_199.jpg

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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
JERRYJIMENEZ36
  • MEMBER
  • 5 POSTS
Ok thanks! I will try that tomorrow in the after noon I am stuck at work thanks!
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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok that is fine when ever you get to it. Let me know what you find.
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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
JERRYJIMENEZ36
  • MEMBER
  • 5 POSTS
Ok So I looked at my mass airflow sensor and its different from the picture you sent me. My mas airflow sensor has five


https://www.2carpros.com/forum/automotive_pictures/479912_getimage_1.jpg

prongs and there all inline isntad of a four prong.
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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
RACEFAN966
  • MECHANIC
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Ok what sub model is you Accord? Is it an EX LX or a Hybrid or?
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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
ERIK88
  • MEMBER
  • 1 POST
  • 2006 HONDA ACCORD
  • 130,000 MILES
Hi, ive been having problems with my 2006 honda accord ex. My check engine light went on and so I ran a test with an obd2 scanner and codes p1034 and code p2243 pooped up. I went to autozone and bought a bosch upstream bank 1 sensor 1 o2 sensor. I replaced the old sensor with this new sensor and unplugged the battery to reset the car. I ran the test again and only code p2243 popped up and I looked this code up and it said "Reference Voltage Circuit/Open (Bank 1 Sensor 1)" so my question is what is this? And how to I fix this? Please help. And thank you in advance.
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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
You have an open circuit in the wiring somewhere. Check to make sure the wiring is good at the sensor, there is no corrosion.
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Friday, June 25th, 2021 AT 9:36 AM (Merged)
Tiny
WILL1337
  • MEMBER
  • 1 POST
  • 2005 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 60,000 MILES
I have a 2005 accord ex 2.4L honda, recently my cel came on and it was my oxygen sensors, my question is how many oxygen sensors I have and which one is more likely to break and which oxygen sensors are best for my car to just plug in and work? THANKS!
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Friday, June 25th, 2021 AT 9:37 AM (Merged)
Tiny
HONDA TECH 1818
  • MECHANIC
  • 536 POSTS
There are two sensors. The air fuel ratio sensor is located at the A-pipe and the secondary oxygen sensor in the catalytic converter. It depends which code was stored. I would use oem parts.
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Friday, June 25th, 2021 AT 9:37 AM (Merged)
Tiny
SUNRISEBABE
  • MEMBER
  • 1 POST
  • 2004 HONDA ACCORD
  • V6
  • FWD
  • AUTOMATIC
  • 90,000 MILES
My engine light came on and the Honda mechanic said that I needed both up stream oxygen sensors replaced and recommended a fuel injection service. He reset the engine light and hasn't come on again in 6 months. How much should I expect to pay to have both up stream oxygen sensors replaced can I do it myself?

Thanks
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Friday, June 25th, 2021 AT 9:37 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
If the light hasn't come back on in that amount of time, chances are everything is working properly. As far as the sensors are concerned, they are about 80 dollars each and take about 20 minutes each to replace. However, as I mentioned, if the light has remained off, they should be fine. Here is a guide to help walk you through the repair with diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the diagrams (Below). Please let us know what you find.
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Friday, June 25th, 2021 AT 9:37 AM (Merged)
Tiny
HEMANKAPS
  • MEMBER
  • 4 POSTS
  • 2003 HONDA ACCORD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 53,000 MILES
Hi,
I have 2003 Honda Accord V6. Recently my Check Engine light came up. On checking the code, it showed P2251/P0134 which are for Bank1 Sensor 1. I was able to locate this sensor as on the backside of the engine.
I tried to open it, but I ran into problem when the sensor cable which is plugged with a male/female coupling did not come out. There is verly little space to move your hand and it seems to be very tight.
Please suggest any tool or how I can take this out?
I even tried to pull the coupling for the front sensor 2, but that too was very tight and could not open.

Quick response is appreciated.

Thanks
Himanshu
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Friday, June 25th, 2021 AT 9:39 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Himanshu,

Thank you for the donation.

There is no special tools for unplugging the terminal. The wireharness side has a locking tab that has to be pressed to release the lock before you can pull the connector off. Sometime sand or dirt gets between the tab rendering it impossible to release the lock.

I would use compressed air to blow out any foreign material before pressing the tab.


https://www.2carpros.com/forum/automotive_pictures/192750_AFSensor03Accord_1.jpg

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Friday, June 25th, 2021 AT 9:39 AM (Merged)

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