Nelsonmd
New member
Where did it go?
Denso o2 Sensor
- Thread starter centxrunner
- Start date
Where did it go?
TheDurk
Elite Member
If you just had a P0420 before, I doubt that's the case. I would definitely check my hookup and seal tightness on the front sensor and scan the engine again for new codes. Did you do anything besides the sensors? Spark plugs maybe? This sounds more like mis-routed plug cables or a loose vacuum hose than a sensor issue.
Nelsonmd
New member
Forgot to update this...
Here is my convo with Denso about this issue.
Hi, I purchased a Denso 234-4162 Oxygen sensor to replace the rear O2 sensor on my 2000 Toyota 4Runner SR5 Auto, Non-Cali emission (The Denso website suggests this one, which is the same as for the front O2 sensor on this vehicle). The wire harness on the sensor is not long enough to reach the vehicle harness side connector (I tried to find slack in the vehicle side harness to make it work, but the vehicle side harness was taut). I have looked online for a part number for a denso sensor with a longer harness, but cannot find one; I just found other people that have had this same problem. I ended up cutting off the wires and connector from my old sensor and soldering them onto the new sensor as an extension, which appears to have worked, but I know Denso will tell me that is not the ideal solution.
My research has shown that Denso makes the best O2 sensors (at least for my vehicle) and are the OEM supplier, so I would like to continue using Denso O2 sensors. Can you help explain the difference in length between the OEM rear O2 sensor and the 234-4162 (or suggest the correct sensor if this one is incorrect).
Thanks for your help.
Matt
Hi Matt,
Thank you for your interest in DENSO oxygen sensors. Can you please provide the original part number to cross reference to a DENSO sensor? Also, is your 4 Runner a 2wd or 4wd this will help us determine the right part for you.
Deanna
Hi Deanna,
What I can find for my O2 sensor part number (based on VIN and frame code) is 89465-39855. The cross reference on the denso website says this part number translates to 234-4154, but I have tried that part number as well (I tried that one first, and it didn't reach the vehicle harness either). My 4runner is 4wd. My frame code is VZN185L-GKPGKA.
Thanks for your help,
Matt
Hi Matt,
According to our specifications that is a direct cross to your OE part number. The lead Length Wire(in): is 12.91. What length do you think it should be? Or what length are you looking for?
Deanna
I am replacing this part on a friend's 96 LTD, so am in the same situation as before.
Here's my summary
Denso lookup:
2000 SR5 non-cali auto 3.4L - 234-4162
1996 LTD non-cali auto 3.4L - 234-4154, 234-4206, 234-4162
ToyoDIY for 2000 SR5 (and 1996) - 89465-39855 (this doesn't exist in the denso interchange)
Denso rep says 234-4154 for my 2000 (EDIT: I really need a 234-4153 as I actually have cali emissions, see later posts on my screw-up)
Here's some interesting info
Wire Length:
234-4154 - 12.91in
234-4162 - 10.63in
234-4206 - 11.77in
I ordered a 234-4154 and the wire was about 8in long. I chucked the box, so I can't check now, but I must have been shipped the wrong part number.
For S's & G's, here are some more wire lengths for flanged type sensors, should be compatible I think.
234-4161 - 15.35in
234-4153 - 17.72in
234-4155 - 24.41in
Sooooooooooooo... I measured the splice job I did on mine, and the length is just about perfect, and is right about at 13in, so I am tentatively convinced that 234-4154 is correct. So I guess the solution for me is to... order another 234-4154 for mine, and hope it is the right one?
I guess I will be ordering the 234-4154 for my friend's 4runner as well. I don't feel good about it though. I am tempted to just order the 161 so that I have extra length.
Any other opinions? If you have ordered any of the P/N's above, measure the tail length and verify that they are the correct length from above.
Here is my convo with Denso about this issue.
Hi, I purchased a Denso 234-4162 Oxygen sensor to replace the rear O2 sensor on my 2000 Toyota 4Runner SR5 Auto, Non-Cali emission (The Denso website suggests this one, which is the same as for the front O2 sensor on this vehicle). The wire harness on the sensor is not long enough to reach the vehicle harness side connector (I tried to find slack in the vehicle side harness to make it work, but the vehicle side harness was taut). I have looked online for a part number for a denso sensor with a longer harness, but cannot find one; I just found other people that have had this same problem. I ended up cutting off the wires and connector from my old sensor and soldering them onto the new sensor as an extension, which appears to have worked, but I know Denso will tell me that is not the ideal solution.
My research has shown that Denso makes the best O2 sensors (at least for my vehicle) and are the OEM supplier, so I would like to continue using Denso O2 sensors. Can you help explain the difference in length between the OEM rear O2 sensor and the 234-4162 (or suggest the correct sensor if this one is incorrect).
Thanks for your help.
Matt
Hi Matt,
Thank you for your interest in DENSO oxygen sensors. Can you please provide the original part number to cross reference to a DENSO sensor? Also, is your 4 Runner a 2wd or 4wd this will help us determine the right part for you.
Deanna
Hi Deanna,
What I can find for my O2 sensor part number (based on VIN and frame code) is 89465-39855. The cross reference on the denso website says this part number translates to 234-4154, but I have tried that part number as well (I tried that one first, and it didn't reach the vehicle harness either). My 4runner is 4wd. My frame code is VZN185L-GKPGKA.
Thanks for your help,
Matt
Hi Matt,
According to our specifications that is a direct cross to your OE part number. The lead Length Wire(in): is 12.91. What length do you think it should be? Or what length are you looking for?
Deanna
I am replacing this part on a friend's 96 LTD, so am in the same situation as before.
Here's my summary
Denso lookup:
2000 SR5 non-cali auto 3.4L - 234-4162
1996 LTD non-cali auto 3.4L - 234-4154, 234-4206, 234-4162
ToyoDIY for 2000 SR5 (and 1996) - 89465-39855 (this doesn't exist in the denso interchange)
Denso rep says 234-4154 for my 2000 (EDIT: I really need a 234-4153 as I actually have cali emissions, see later posts on my screw-up)
Here's some interesting info
Wire Length:
234-4154 - 12.91in
234-4162 - 10.63in
234-4206 - 11.77in
I ordered a 234-4154 and the wire was about 8in long. I chucked the box, so I can't check now, but I must have been shipped the wrong part number.
For S's & G's, here are some more wire lengths for flanged type sensors, should be compatible I think.
234-4161 - 15.35in
234-4153 - 17.72in
234-4155 - 24.41in
Sooooooooooooo... I measured the splice job I did on mine, and the length is just about perfect, and is right about at 13in, so I am tentatively convinced that 234-4154 is correct. So I guess the solution for me is to... order another 234-4154 for mine, and hope it is the right one?
I guess I will be ordering the 234-4154 for my friend's 4runner as well. I don't feel good about it though. I am tempted to just order the 161 so that I have extra length.
Any other opinions? If you have ordered any of the P/N's above, measure the tail length and verify that they are the correct length from above.
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smallfry
New member
Sorry, going to thread jack but what is difference between the Denso and Bosch O2 sensor?
I picked up a Bosch O2 sensor to replace the the sensor before the cat and noticed that the stubby end that goes into the exhaust is shorter than the one that is currently installed. Why is there a difference? I noticed on the Denso and URD site that they both have the longer stubby end. Is that because of the California emissions? Is there a differense in performance?
The rear sensor is the same way. My 4runner came from Arizona.
Bosch O2 sensor in question -
Bosch 13104 - Oxygen Sensor | O'Reilly Auto Parts
I picked up a Bosch O2 sensor to replace the the sensor before the cat and noticed that the stubby end that goes into the exhaust is shorter than the one that is currently installed. Why is there a difference? I noticed on the Denso and URD site that they both have the longer stubby end. Is that because of the California emissions? Is there a differense in performance?
The rear sensor is the same way. My 4runner came from Arizona.
Bosch O2 sensor in question -
Bosch 13104 - Oxygen Sensor | O'Reilly Auto Parts
PitbullRescuer
New member
HELP!!!!!!!!!!!!!!!!!!
I just received my Denso 234-4162 Oxygen Sensor for my 99' 3.4L T4R. I bought this to replace the pre-cat sensor.
Sensor fit right in nice and snug. Went to plug it in, the connector is the wrong connector? Whiskey Tango Foxtrot?
Any input here guys? Just to be clear, the length of the wires was fire but the plug was wrong. Pulled the old one back out and sure enough, different plug.
I just received my Denso 234-4162 Oxygen Sensor for my 99' 3.4L T4R. I bought this to replace the pre-cat sensor.
Sensor fit right in nice and snug. Went to plug it in, the connector is the wrong connector? Whiskey Tango Foxtrot?
Any input here guys? Just to be clear, the length of the wires was fire but the plug was wrong. Pulled the old one back out and sure enough, different plug.
TheDurk
Elite Member
Different plug likely means you are trying to put a 49-state sensor on a Cali. truck. The plugs are different to keep people from doing this. How many cats do you have? I bet you have two. Then you need a 234-9002 (auto) or 234-9003 (manual).
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PitbullRescuer
New member
Nope. I only have 1 cat and it's been a PA truck all it's life according to Carfax. ??????
TheDurk
Elite Member
I am sure Carfax says my Cali. '99 has been a NJ truck all it's life since I bought it here new. But if you truly have one cat then you must have the wrong sensor. Just for fun, what does the emissions label under the hood say?
BrianSD_42
New member
carfax says . . . .
hahaa
no offense but people have way way too much faith in carfax. the site is not that accurate. I carfaxed my truck that I have owned since 2003, it doesnt list 2 accidents. both were $2000 - $4000 damage to my truck and were reported to the CA DMV.
I am not alone, many people have bought vehicles with clean carfax only to have mechanic tell them it has been in 3 wrecks. carfax often doesnt show accidents unless the car becomes totalled/salvaged.
hahaa
no offense but people have way way too much faith in carfax. the site is not that accurate. I carfaxed my truck that I have owned since 2003, it doesnt list 2 accidents. both were $2000 - $4000 damage to my truck and were reported to the CA DMV.
I am not alone, many people have bought vehicles with clean carfax only to have mechanic tell them it has been in 3 wrecks. carfax often doesnt show accidents unless the car becomes totalled/salvaged.
PitbullRescuer
New member
I don't rely on Carfax to tell me if it's been hit or not, I can do that myself. But I would think their registration info would be accurate.
It does only have 1 cat but as soon as the Phillies game is over I'm going to run outside and look at that emissions sticker.
It does only have 1 cat but as soon as the Phillies game is over I'm going to run outside and look at that emissions sticker.
PitbullRescuer
New member
This is odd. 1cat but I'll be damned it does have a California emissions sticker.
PitbullRescuer
New member
So I log onto Amazon, of course 234-9002 is $40 more. Explain to the customer service guy that their "will this fit" said the other part number was correct for my vehicle. Then I went to Denso and tracked down the correct part number.
Sending me out the correct one and gave me the $40 credit to off set the difference in price between the two. Not bad...
Sending me out the correct one and gave me the $40 credit to off set the difference in price between the two. Not bad...
TheDurk
Elite Member
I win. It was definitely born a Cali. truck and has the Cali. ECM and harness. If it has only one cat, I'm guessing a PO did his own non-conforming cat installation. I am surprised it hasn't been throwing a CEL (p0420). This truck is new to you, if I remember right. Any chance PO has a URD simulator in there he neglected to mention?
PitbullRescuer
New member
Maybe, no idea what a URD simulator is. 
.
Although it might male me look like a jacka**, do these trucks have a cat, resonator and muffler? Or would it be cat, cat, muffler? If it's the latter than you were right on both counts Durk. But the 2nd cat doesn't have a heat shield and appears to be a little different than the front cat.
. Although it might male me look like a jacka**, do these trucks have a cat, resonator and muffler? Or would it be cat, cat, muffler? If it's the latter than you were right on both counts Durk. But the 2nd cat doesn't have a heat shield and appears to be a little different than the front cat.
TheDurk
Elite Member
Maybe, no idea what a URD simulator is.
Although it might male me look like a jacka**, do these trucks have a cat, resonator and muffler? Or would it be cat, cat, muffler? If it's the latter than you were right on both counts Durk. But the 2nd cat doesn't have a heat shield and appears to be a little different than the front cat.
hehe, hey, I wasn't sure first time I looked at it. Front cat is just after the bend, (sensor is on the bend) and is smaller than the rear one. It does have a heat shield. Somebody had a pic of the-two cat system up just recently--I'll see if I can find it. It is cat,cat, muffler.
I honestly doubt CarFax knows a Cali from a Federal. Nowhere in my title, registration, invoice, or any other paperwork except that label does it say Cali. I didn't even know I had one until my sensor went and I had to buy a new one after 86k and seven years. No one at the dealer mentioned it when I was buying the thing.
Found it--it was over on Yotatech--guy in Maryland didn't think he had a Cali. either. Here is the front cat:
and here are both in one shot:
A is front, B is rear. I would bet that heat shield can fall off--I had to replace the bolts holding the two halves together as one disappeared and another was loose.
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PitbullRescuer
New member
That's the set up, I stand corrected. My front heat shield was actually rusted pretty bad and only one of the top botls was still in, other 3 were gone so I just took it off. My rear one the heat shield is gone. The rear being larger I thought was just a resonator.
So, did Toyota basically just ship California equipped trucks all over the place I guess?
So, did Toyota basically just ship California equipped trucks all over the place I guess?
TheDurk
Elite Member
Pretty much. The Cali. setup went federal 50-state in 2001 to meet tougher Fed standards that matched the '99 Cali. standard, so they were already winding down on the 1-cat system in '99 and '00.
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bigtimeweb
New member
NVM...was asking for tip on getting harness plugs to separate but finally got it.
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Nelsonmd
New member
Just for the record here, I just got in the 234-4154 I ordered for my pastor's 96 LTD, installing it tomorrow night.
Autozone website states a length of 12.91in.
For completeness, markings on the sensor itself are:
25710
02J23
2571
Apparently that is measured from the top of the flange collar. I highly suspect this will be too short and I will have to do another solder hack job like I did on mine. I really don't want to do that, but it may need to happen.
I'll try to remember to take pics of the install. If it doesn't fit, I will be sending pics of it to Denso and asking for a free replacement.
Autozone website states a length of 12.91in.
For completeness, markings on the sensor itself are:
25710
02J23
2571
Apparently that is measured from the top of the flange collar. I highly suspect this will be too short and I will have to do another solder hack job like I did on mine. I really don't want to do that, but it may need to happen.
I'll try to remember to take pics of the install. If it doesn't fit, I will be sending pics of it to Denso and asking for a free replacement.
