[Request] How To Replace Rear Oxygen Sensor

[wtcii]

I have a CEL on. My Honda dealer checked it and said that my rear oxygen sensor was bad. I was wondering if any of you knew how to replace this. I cant find the part anywhere online, but it is $88.00 at the Dealer. I know I can do better than that price. Does anyone know the part number? Thanks!

[InFuMoUs]

I'm pretty sure it's item #17, but I'm assuming ya car is a 03-05. Check this site out click me. Part number is 36532-RAA-A01, but make sure that's the O2 sensor you need cuz I dont think you can return special order/electrical parts. Price might be about the same when you factor in shipping so compare it to the dealer price.

[Skippy]

I believe Steve is correct with the part.  That should be what you're looking for since it's the secondary O2 sensor and not the A/F sensor.  Replacing the sensor is easy.  Place the car on jackstands or ramps.  Move the passenger seat all the way forward, under the middle of the seat will be a flap of carpet that can be pulled up.  You'll see the O2 sensor harness there.  Unplug the harness and force it through the body grommet out of the bottom of the vehicle.

Remove the oxygen sensor from the catalytic converter with an O2 sensor socket (available from pep-boys or auto zone), remove the protective plastic shield from the new sensor, install into the bung, tighten 1/2 turn past contact to seat the crush washer, run the new harness up through the body grommet (silicone spray helps the grommet slip into place and seal correctly), reconnect the harness under the seat, clear the codes, and drive away.

[Milan]

Bingo!  Skippy speaks the truth.  I just had to replace my primary (A/F) O2 sensor about a month ago.  Get the oxygen sensor removal tool (free from Auto Zone loan-a-tool program) I couldn't do it without it.  Just so you're sure, get the code so that you're getting the right sensor.

[wtcii]

I will go get the code again then make sure it is the correct sensor and do it. Thanks for the help.

[suleman_manji]

7/8" Wrench can work also (i'm anti-o2 sensor tool)

[wtcii]

I finally got around to replacing it today. The only thing that I did not see in Skippy's directions was removing what appeared to be a heat shield on the catalytic converter. That may only be required if you use an open ended 7/8" wrench, other than that it was exactly as he said. Cost me $78.00 where it would have cost me $88.00 + labor at the dealership. Thanks for all the help!

[slipkord]

I had to do the same with my wifes accord. Although I got mine from Honda only because autozone and the like were the same price.

How many miles are on your car?

[ibcnunv]

what was the code?

[K24_Tink]

i had to change like 4 freakin sensors!they all got effed' up at the same time. . .weird! the map sensor, tps, and both o2 sensors. alot of money!

[thisaznboi88]

hmm why didn't you go with a wideband o2? Anyways nice job of doing it yourself.

[timot_one]

People do not use a wideband O2 sensor to replace their secondary O2 sensor on their cat.  In addition to that, you need to replace your O2 sensors with factory equipment so your ECU doesn't freak out.  When you use a wideband O2 sensor, you use it in addition to your primary O2 sensor on your exhaust manifold.  The only other time you would ever replace your primary O2 sensor on your exhaust manifold with a wideband O2 sensor is if you install kpro, but you then need to use an adapter or modify the connector since the plug on the RSX O2 is not the same as the Accord.

[CrazyCreashunz]

The primary 02 sensor on the exhaust mani if it went bad and had to be replaced would it cause you to basically go through gas like water? Im just curious...

[Skippy]

I've cleared this up on G7A and I suppose I'll clear it up again here just to get everybody straight...

I'll eliminate today's history lesson just to keep things short...There is no such thing as a primary oxygen sensor on a K series engine.  It is actually called the Primary Air Fuel Ratio sensor.  It doesn't seem like much of a difference, but honda decided to change something else for the K series that we have to remember.  If you approach a honda parts rep asking for a primary O2 sensor, they'll ask you if you mean "primary air fuel ratio sensor", so be prepared to answer "yes" to that question.

Yes Billy, a Primary AFR sensor malfunction will result in a fuel consumption increase.  You'll see your CEL illuminated, and the car will go through more gasoline than normal.  The primary AFR sensor helps the computer decide the values for fuel trim and if it goes bad, the computer has a hard time deciding on how much fuel to dump, and as a safety measure, it dumps more fuel than it needs to in order to prevent detonation.

[CrazyCreashunz]

I've cleared this up on G7A and I suppose I'll clear it up again here just to get everybody straight...

I'll eliminate today's history lesson just to keep things short...There is no such thing as a primary oxygen sensor on a K series engine.  It is actually called the Primary Air Fuel Ratio sensor.  It doesn't seem like much of a difference, but honda decided to change something else for the K series that we have to remember.  If you approach a honda parts rep asking for a primary O2 sensor, they'll ask you if you mean "primary air fuel ratio sensor", so be prepared to answer "yes" to that question.

Yes Billy, a Primary AFR sensor malfunction will result in a fuel consumption increase.  You'll see your CEL illuminated, and the car will go through more gasoline than normal.  The primary AFR sensor helps the computer decide the values for fuel trim and if it goes bad, the computer has a hard time deciding on how much fuel to dump, and as a safety measure, it dumps more fuel than it needs to in order to prevent detonation.

Thank you for answering that for me, and good too know that t is called the "Primary AFR sensor"!