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post #1 of 30 Old 06-15-2006, 08:21 AM Thread Starter
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secondary o2 sensor

2003 lx 2.4 cel light is on...... took to autozone and got code p0141.
my question is how is the secondary o2 sensor attached, I removed the rubber grommets under the car and could not see any type of connector and I did not want to pull on the wires too much any help on this would be appreciated. I have a new sensor on the way from hondacura world .


kody 03 lx I4
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post #2 of 30 Old 06-15-2006, 08:50 AM
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Have you tried just erasing the code and driving it around? Our ML320 popped that code but it hasn't come back on...from what I know if the sensor is really faulty it should be accompanied by P0136.

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post #3 of 30 Old 06-15-2006, 10:57 AM Thread Starter
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according to the service manual for my 2003 pilot P0141 does not have temporary DTC P0136. P0137-139 do. but anyway, I was able to find the connector........of all places under the passenger seat. also I did reset the code once at autozone but it came back a few weeks later. now it comes on and off every few days. I tried super unleaded gas and it turned off for a few days and now is on again. thanks again.

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post #4 of 30 Old 06-15-2006, 03:49 PM
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P0141 in my book is O2 sensor heater circuit malfunction, P0136 is the same sensor, but the sensor itself malfunction. It would make sense that if it's really bad, both should pop at the same time. But actually I don't know because like I said this is for a ML320 and not an Accord...sorry I wasn't much help I think there should be a special tool to pull the O2 sensor, ask Autozone they lend tools.
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post #5 of 30 Old 06-15-2006, 04:07 PM
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1 of 2

Special Tools Required
O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available
Pull back the carpet from the floor rail under the front edge of the front passenger seat to expose the secondary HO2S 4P connector.

Disconnect the secondary HO2S 4P connector (A).
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post #6 of 30 Old 06-15-2006, 04:09 PM
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2 of 2

Remove the secondary HO2S (A), and the covers (B).

Install the secondary HO2S in the reverse order of removal.
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post #7 of 30 Old 06-15-2006, 04:10 PM
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Article on it on page 3
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File Type: pdf dec 05.pdf (283.3 KB, 1135 views)
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post #8 of 30 Old 06-15-2006, 07:35 PM Thread Starter
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Thank You everyone. Does anyone know if there is a way to clear the DTC without a scanner on the 03 accords? I think the autozone guys are getting tired of seeing me. After all I havent bought anything from them these last few trips.

kody 03 lx I4
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post #9 of 30 Old 06-15-2006, 07:40 PM
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Apparently the 05 can't be cleared except using the scanner...03 should be the same

The "FI ECU" underhood fuse - whats it do?
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post #10 of 30 Old 06-18-2007, 08:15 PM
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Oops

CEL came on.

Went to AutoZone to get the code checked.

P0141 - Buy this $80 sensor.

Installed.

CEL went away, then came back. Still P0141.

Oops, we sold you the primary sensor, should have sold you the secondary. Too bad you installed it and ran with it.

Damnit, secondary sensor is $130.

Why oh why can I not learn to research more before buying expensive things that I DON'T need. (sigh) I'll learn someday....

Can I run a few days before I install that secondary, or am I going to detonate my car?

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post #11 of 30 Old 10-24-2007, 05:43 PM
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Quote:
Originally Posted by princess View Post
Special Tools Required
O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available
Pull back the carpet from the floor rail under the front edge of the front passenger seat to expose the secondary HO2S 4P connector.

Disconnect the secondary HO2S 4P connector (A).
Hello everyone, I'm attempting to replace this myself. I ordered one online, and now I'm having a hard time 'pulling back the carpet'.

There is an edge to the carpet that runs along the floor at the front edge of the passenger seat, and it looks like the carpet then goes around the seat bolts. But the carpet then continues up to the center armrest of the car.

Underneath the seat there are two black circular plastic connectors holding down the carpet that look like they would just be snaps, but I haven't been able to pop them off.

I was able to remove two snaps on the plastic moulding on the center assembly, so I am wondering if there is something more to pulling up these two snaps under the seat.

Any suggestions?
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post #12 of 30 Old 10-24-2007, 09:18 PM
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Most of the carpets have a slit in them at the place you need. My prince doesn't remove the carpet.

I believe to remove the clips, you'd need a flat forky spatula looking thing & pry gently. But haven't looked it up....
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post #13 of 30 Old 10-29-2007, 11:53 AM
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Okay, I figured out what I was doing wrong. I was trying to access the floor just in front of the passenger seat. I was supposed to slide the passenger seat all the way forward and then access the plug from behind.

By the way, I was able to get the carpet clips up with a plastic barbecue prong, even though I didn't need to do that.

Now that I replaced the O2 sensor, the check engine light is still on. I'll give it a couple of days to see if it goes off on its own. If not, do you think the dealer will clear the codes for free? Thanks for your help.
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post #14 of 30 Old 10-29-2007, 12:19 PM
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Pull the clock fuse on the passenger side fuse box for a couple minutes it'll clear the code. The CEL may take as long as 50 starts to clear on its own (so I've heard), or could be just a couple days.
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post #15 of 30 Old 10-29-2007, 08:15 PM
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Good news, the CEL went off by itself later today. Thanks to everyone that helped me, and good luck to anyone else that runs into this seemingly common issue.

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