More 2000 Sienna O2 Oxygen sensors questions. Qslim ?

Van is 2000 Sienna w/California emissions, made 07/2000 -
engine is 1MZ-FE,

Looked around underneath and found one O2 sensor between the cat and
the engine, and one after the cat, toward the rear of the van.

I've spent a lot of time online and with online vendors' help ppl and
received somewhat contradictory information about what will do the
job.

2 questions:

1/ Are there actually TWO O2 sensors between the cat and the engine -
vendors' sites seem to suggest this - saying "2 required" ? As above,
I saw only one [towards the passenger side] but wasn't looking for a
2nd one at the time.

2/ I am a electronics buff and ham-radio operator who would have no
trouble doing the cut and splice wiring job required to install the
much less expensive Bosch Universal sensor[s]. Does anyone know if
they will work with the Calif. emissions engine ?

TIA, QE in NJ

"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...[color=blue]
> Van is 2000 Sienna w/California emissions, made 07/2000 -
> engine is 1MZ-FE,
>
> Looked around underneath and found one O2 sensor between the cat and
> the engine, and one after the cat, toward the rear of the van.
>
> I've spent a lot of time online and with online vendors' help ppl and
> received somewhat contradictory information about what will do the
> job.
>
> 2 questions:
>
> 1/ Are there actually TWO O2 sensors between the cat and the engine -
> vendors' sites seem to suggest this - saying "2 required" ? As above,
> I saw only one [towards the passenger side] but wasn't looking for a
> 2nd one at the time.[/color]

There should be ONE upstream and ONE downstream, two total.
[color=blue]
>
> 2/ I am a electronics buff and ham-radio operator who would have no
> trouble doing the cut and splice wiring job required to install the
> much less expensive Bosch Universal sensor[s]. Does anyone know if
> they will work with the Calif. emissions engine ?
>
> TIA, QE in NJ[/color]

Yeah, they work. You may not get the mileage you're accustomed to, or you
may not be as clean at inspection as you were before, but they will work.

I use thim in 20 YO Celicas and Tercels when I want them to *JUST* pass
emissions. If the van is a beater and you're thinking of sending it to the
wrecker's in a year or two, buy the Bosch. It won't HURT (I used one in a
'95 Tercel; $30 at the CarQuest I was working at). But if I had the $$$, I'd
go OEM.

"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...[color=blue]
> Van is 2000 Sienna w/California emissions, made 07/2000 -
> engine is 1MZ-FE,
>
> Looked around underneath and found one O2 sensor between the cat and
> the engine, and one after the cat, toward the rear of the van.
>
> I've spent a lot of time online and with online vendors' help ppl and
> received somewhat contradictory information about what will do the
> job.
>
> 2 questions:
>
> 1/ Are there actually TWO O2 sensors between the cat and the engine -
> vendors' sites seem to suggest this - saying "2 required" ? As above,
> I saw only one [towards the passenger side] but wasn't looking for a
> 2nd one at the time.[/color]

There is one O2 sensor per bank between the cat and the engine. On a V-6
engine with 2 banks, you would have 2 O2 sensors before the cat.
[color=blue]
>
> 2/ I am a electronics buff and ham-radio operator who would have no
> trouble doing the cut and splice wiring job required to install the
> much less expensive Bosch Universal sensor[s]. Does anyone know if
> they will work with the Calif. emissions engine ?
>
> TIA, QE in NJ[/color]

I have no experience with Bosch universal sensors so I can't comment on how
they work, but if you are going to try one, I suggest cutting the pigtail
off of the old sensor and splice it to the new sensor so that you don't mess
with the harness to the ECU. You then have the option of going back to a
factory O2 sensor without any problems.
--

Ray O
(correct punctuation to reply)

Thanks Ray, read 2 comments below interspersed with your text. QE

On Fri, 3 Mar 2006 10:34:16 -0600, "Ray O"
<rokigawa@tristarassociatesDOTcomn> wrote:

|
|"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
|news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...
|> Van is 2000 Sienna w/California emissions, made 07/2000 -
|> engine is 1MZ-FE,
|>
|> Looked around underneath and found one O2 sensor between the cat
and
|> the engine, and one after the cat, toward the rear of the van.
|>
|> I've spent a lot of time online and with online vendors' help ppl
and
|> received somewhat contradictory information about what will do the
|> job.
|>
|> 2 questions:
|>
|> 1/ Are there actually TWO O2 sensors between the cat and the
engine -
|> vendors' sites seem to suggest this - saying "2 required" ? As
above,
|> I saw only one [towards the passenger side] but wasn't looking for
a
|> 2nd one at the time.
|
|There is one O2 sensor per bank between the cat and the engine. On a
V-6
|engine with 2 banks, you would have 2 O2 sensors before the cat.

I read that to mean that besides the Air/Fuel sensor [ which is very
visable] on the exhaust manifold close to the radiator there is an O2
sensor somewhere on that manifold or whatever it becomes on its way to
the cat, that I have not yet discovered - will look when wife returns
home with the van. Thanks. Info on Bosch universals below.

|
|>
|> 2/ I am a electronics buff and ham-radio operator who would have
no
|> trouble doing the cut and splice wiring job required to install the
|> much less expensive Bosch Universal sensor[s]. Does anyone know
if
|> they will work with the Calif. emissions engine ?
|>
|> TIA, QE in NJ
|
|I have no experience with Bosch universal sensors so I can't comment
|on how they work, but if you are going to try one, I suggest cutting
|the pigtail off of the old sensor and splice it to the new sensor so
|that you don't mess with the harness to the ECU. You then have the
|option of going back to a factory O2 sensor without any problems.

Not having seen one, you guessed it anyway :-) !! That's exactly how
they work. Here's a link to the installation guide for Bosch
Universals, which sell online for less than $70 delivered.

[url]http://www.boschusa.com/images/OxygenSensorInstall.pdf[/url]

QE

"Ray O" <rokigawa@tristarassociatesDOTcomn> wrote in message
news:df078$4408700e$44a4a10d$29653@msgid.meganewsservers.com...[color=blue]
>
> "QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
> news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...[color=green]
>> Van is 2000 Sienna w/California emissions, made 07/2000 -
>> engine is 1MZ-FE,
>>
>> Looked around underneath and found one O2 sensor between the cat and
>> the engine, and one after the cat, toward the rear of the van.
>>
>> I've spent a lot of time online and with online vendors' help ppl and
>> received somewhat contradictory information about what will do the
>> job.
>>
>> 2 questions:
>>
>> 1/ Are there actually TWO O2 sensors between the cat and the engine -
>> vendors' sites seem to suggest this - saying "2 required" ? As above,
>> I saw only one [towards the passenger side] but wasn't looking for a
>> 2nd one at the time.[/color]
>
> There is one O2 sensor per bank between the cat and the engine. On a V-6
> engine with 2 banks, you would have 2 O2 sensors before the cat.
>[color=green]
>>
>> 2/ I am a electronics buff and ham-radio operator who would have no
>> trouble doing the cut and splice wiring job required to install the
>> much less expensive Bosch Universal sensor[s]. Does anyone know if
>> they will work with the Calif. emissions engine ?
>>
>> TIA, QE in NJ[/color]
>
> I have no experience with Bosch universal sensors so I can't comment on
> how they work, but if you are going to try one, I suggest cutting the
> pigtail off of the old sensor and splice it to the new sensor so that you
> don't mess with the harness to the ECU. You then have the option of going
> back to a factory O2 sensor without any problems.
> --
>
> Ray O
> (correct punctuation to reply)
>[/color]

He also has to obey the color codes and make sure Signal and Ground are
wired correctly; the two white wires on the Bosch are the pre-heater and are
wired into the heater wires on the connector. I can't remember the codes
right now, but i think I googled it, IIRC.

Thanks for the info and anecdotes Hachiroku - not sure exactly what
upstream and downstream mean - I think you mean before [upstream] and
after [downstream] the cat - if this is wrong further explanation
would be welcome.

Cheers, QE
=======================

On Fri, 03 Mar 2006 15:35:15 GMT, "Hachiroku" <Trueno@ae86.GTS> wrote:

|
|"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
|news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...
|> Van is 2000 Sienna w/California emissions, made 07/2000 -
|> engine is 1MZ-FE,
|>
|> Looked around underneath and found one O2 sensor between the cat
and
|> the engine, and one after the cat, toward the rear of the van.
|>
|> I've spent a lot of time online and with online vendors' help ppl
and
|> received somewhat contradictory information about what will do the
|> job.
|>
|> 2 questions:
|>
|> 1/ Are there actually TWO O2 sensors between the cat and the
engine -
|> vendors' sites seem to suggest this - saying "2 required" ? As
above,
|> I saw only one [towards the passenger side] but wasn't looking for
a
|> 2nd one at the time.
|
|There should be ONE upstream and ONE downstream, two total.
|
|>
|> 2/ I am a electronics buff and ham-radio operator who would have
no
|> trouble doing the cut and splice wiring job required to install the
|> much less expensive Bosch Universal sensor[s]. Does anyone know
if
|> they will work with the Calif. emissions engine ?
|>
|> TIA, QE in NJ
|
|Yeah, they work. You may not get the mileage you're accustomed to, or
you
|may not be as clean at inspection as you were before, but they will
work.
|
|I use thim in 20 YO Celicas and Tercels when I want them to *JUST*
pass
|emissions. If the van is a beater and you're thinking of sending it
to the
|wrecker's in a year or two, buy the Bosch. It won't HURT (I used one
in a
|'95 Tercel; $30 at the CarQuest I was working at). But if I had the
$$$, I'd
|go OEM.
|

"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
news:1cvg02lu6e0ess6qfeq0e5kie857up5ecf@4ax.com...[color=blue]
> Thanks for the info and anecdotes Hachiroku - not sure exactly what
> upstream and downstream mean - I think you mean before [upstream] and
> after [downstream] the cat - if this is wrong further explanation
> would be welcome.
>
> Cheers, QE
> =======================[/color]


Yup! That's it!
[color=blue]
>
> On Fri, 03 Mar 2006 15:35:15 GMT, "Hachiroku" <Trueno@ae86.GTS> wrote:
>
> |
> |"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
> |news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...
> |> Van is 2000 Sienna w/California emissions, made 07/2000 -
> |> engine is 1MZ-FE,
> |>
> |> Looked around underneath and found one O2 sensor between the cat
> and
> |> the engine, and one after the cat, toward the rear of the van.
> |>
> |> I've spent a lot of time online and with online vendors' help ppl
> and
> |> received somewhat contradictory information about what will do the
> |> job.
> |>
> |> 2 questions:
> |>
> |> 1/ Are there actually TWO O2 sensors between the cat and the
> engine -
> |> vendors' sites seem to suggest this - saying "2 required" ? As
> above,
> |> I saw only one [towards the passenger side] but wasn't looking for
> a
> |> 2nd one at the time.
> |
> |There should be ONE upstream and ONE downstream, two total.
> |
> |>
> |> 2/ I am a electronics buff and ham-radio operator who would have
> no
> |> trouble doing the cut and splice wiring job required to install the
> |> much less expensive Bosch Universal sensor[s]. Does anyone know
> if
> |> they will work with the Calif. emissions engine ?
> |>
> |> TIA, QE in NJ
> |
> |Yeah, they work. You may not get the mileage you're accustomed to, or
> you
> |may not be as clean at inspection as you were before, but they will
> work.
> |
> |I use thim in 20 YO Celicas and Tercels when I want them to *JUST*
> pass
> |emissions. If the van is a beater and you're thinking of sending it
> to the
> |wrecker's in a year or two, buy the Bosch. It won't HURT (I used one
> in a
> |'95 Tercel; $30 at the CarQuest I was working at). But if I had the
> $$$, I'd
> |go OEM.
> |
>[/color]

"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
news:tuug02l0h9uo7fnh4d7efgsb3iaipakl82@4ax.com...[color=blue]
> Thanks Ray, read 2 comments below interspersed with your text. QE
>
> On Fri, 3 Mar 2006 10:34:16 -0600, "Ray O"
> <rokigawa@tristarassociatesDOTcomn> wrote:
>
> |
> |"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
> |news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...
> |> Van is 2000 Sienna w/California emissions, made 07/2000 -
> |> engine is 1MZ-FE,
> |>
> |> Looked around underneath and found one O2 sensor between the cat
> and
> |> the engine, and one after the cat, toward the rear of the van.
> |>
> |> I've spent a lot of time online and with online vendors' help ppl
> and
> |> received somewhat contradictory information about what will do the
> |> job.
> |>
> |> 2 questions:
> |>
> |> 1/ Are there actually TWO O2 sensors between the cat and the
> engine -
> |> vendors' sites seem to suggest this - saying "2 required" ? As
> above,
> |> I saw only one [towards the passenger side] but wasn't looking for
> a
> |> 2nd one at the time.
> |
> |There is one O2 sensor per bank between the cat and the engine. On a
> V-6
> |engine with 2 banks, you would have 2 O2 sensors before the cat.
>
> I read that to mean that besides the Air/Fuel sensor [ which is very
> visable] on the exhaust manifold close to the radiator there is an O2
> sensor somewhere on that manifold or whatever it becomes on its way to
> the cat, that I have not yet discovered - will look when wife returns
> home with the van. Thanks. Info on Bosch universals below.[/color]

Think of an engine bank as an independent engine - in other words, in a V-6
engine, you would have two 3-cylinder engines that are connected at the
bottom. Each of the two engines/banks has two O2 sensors.

O2 sensor #1 is closest to the engine and measures the amount of oxygen in
the exhaust and vehicle's electronic control unit (ECU) adjusts how much
fuel gets mixed with the air based on what the O2 sensor is telling it.

O2 sensor #2 is after, or downstream of the catalytic converter. It is also
measuring the oxygen in the exhaust and is basically there to make sure that
the cat is doing its job. If the cat is not cleaning up the exhaust, then
O2 sensor #2 would sense it and let the ECU know.

Each cylinder bank has O2 sensor #1 and O2 sensor #2. Besides the O2 #1
sensor visible in the exhaust manifold near the radiator (Bank 2), there is
another one in the exhaust manifold near the firewall (bank 1).

As far as i know, there is not a 3rd one in the system, unless that is
something new.
[color=blue]
> |>
> |> 2/ I am a electronics buff and ham-radio operator who would have
> no
> |> trouble doing the cut and splice wiring job required to install the
> |> much less expensive Bosch Universal sensor[s]. Does anyone know
> if
> |> they will work with the Calif. emissions engine ?
> |>
> |> TIA, QE in NJ
> |
> |I have no experience with Bosch universal sensors so I can't comment
> |on how they work, but if you are going to try one, I suggest cutting
> |the pigtail off of the old sensor and splice it to the new sensor so
> |that you don't mess with the harness to the ECU. You then have the
> |option of going back to a factory O2 sensor without any problems.
>
> Not having seen one, you guessed it anyway :-) !! That's exactly how
> they work. Here's a link to the installation guide for Bosch
> Universals, which sell online for less than $70 delivered.
>
> [url]http://www.boschusa.com/images/OxygenSensorInstall.pdf[/url]
>
> QE
>[/color]

Check your local Toyota dealer for the price of an OEM O2 sensor. I may be
wrong, but I don't think they are that much more than an aftermarket one.

Good luck!
--

Ray O
(correct punctuation to reply)

"Ray O" <rokigawa@tristarassociatesDOTcomn> wrote in message
news:b2a6e$44089abf$44a4a10d$31401@msgid.meganewsservers.com...[color=blue]
>
>
> "QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
> news:tuug02l0h9uo7fnh4d7efgsb3iaipakl82@4ax.com...[color=green]
>> Thanks Ray, read 2 comments below interspersed with your text. QE
>>
>> On Fri, 3 Mar 2006 10:34:16 -0600, "Ray O"
>> <rokigawa@tristarassociatesDOTcomn> wrote:
>>
>> |
>> |"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
>> |news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...
>> |> Van is 2000 Sienna w/California emissions, made 07/2000 -
>> |> engine is 1MZ-FE,
>> |>
>> |> Looked around underneath and found one O2 sensor between the cat
>> and
>> |> the engine, and one after the cat, toward the rear of the van.
>> |>
>> |> I've spent a lot of time online and with online vendors' help ppl
>> and
>> |> received somewhat contradictory information about what will do the
>> |> job.
>> |>
>> |> 2 questions:
>> |>
>> |> 1/ Are there actually TWO O2 sensors between the cat and the
>> engine -
>> |> vendors' sites seem to suggest this - saying "2 required" ? As
>> above,
>> |> I saw only one [towards the passenger side] but wasn't looking for
>> a
>> |> 2nd one at the time.
>> |
>> |There is one O2 sensor per bank between the cat and the engine. On a
>> V-6
>> |engine with 2 banks, you would have 2 O2 sensors before the cat.
>>
>> I read that to mean that besides the Air/Fuel sensor [ which is very
>> visable] on the exhaust manifold close to the radiator there is an O2
>> sensor somewhere on that manifold or whatever it becomes on its way to
>> the cat, that I have not yet discovered - will look when wife returns
>> home with the van. Thanks. Info on Bosch universals below.[/color]
>
> Think of an engine bank as an independent engine - in other words, in a
> V-6 engine, you would have two 3-cylinder engines that are connected at
> the bottom. Each of the two engines/banks has two O2 sensors.
>
> O2 sensor #1 is closest to the engine and measures the amount of oxygen in
> the exhaust and vehicle's electronic control unit (ECU) adjusts how much
> fuel gets mixed with the air based on what the O2 sensor is telling it.
>
> O2 sensor #2 is after, or downstream of the catalytic converter. It is
> also measuring the oxygen in the exhaust and is basically there to make
> sure that the cat is doing its job. If the cat is not cleaning up the
> exhaust, then O2 sensor #2 would sense it and let the ECU know.
>
> Each cylinder bank has O2 sensor #1 and O2 sensor #2. Besides the O2 #1
> sensor visible in the exhaust manifold near the radiator (Bank 2), there
> is another one in the exhaust manifold near the firewall (bank 1).
>
> As far as i know, there is not a 3rd one in the system, unless that is
> something new.
>[color=green]
>> |>
>> |> 2/ I am a electronics buff and ham-radio operator who would have
>> no
>> |> trouble doing the cut and splice wiring job required to install the
>> |> much less expensive Bosch Universal sensor[s]. Does anyone know
>> if
>> |> they will work with the Calif. emissions engine ?
>> |>
>> |> TIA, QE in NJ
>> |
>> |I have no experience with Bosch universal sensors so I can't comment
>> |on how they work, but if you are going to try one, I suggest cutting
>> |the pigtail off of the old sensor and splice it to the new sensor so
>> |that you don't mess with the harness to the ECU. You then have the
>> |option of going back to a factory O2 sensor without any problems.
>>
>> Not having seen one, you guessed it anyway :-) !! That's exactly how
>> they work. Here's a link to the installation guide for Bosch
>> Universals, which sell online for less than $70 delivered.
>>
>> [url]http://www.boschusa.com/images/OxygenSensorInstall.pdf[/url]
>>
>> QE
>>[/color]
>
> Check your local Toyota dealer for the price of an OEM O2 sensor. I may
> be wrong, but I don't think they are that much more than an aftermarket
> one.
>
> Good luck!
> --
>
> Ray O
> (correct punctuation to reply)
>[/color]


Last I knew, the Bosch's were running anywhere from $19 to $149, and the
OEMs were around $135-175 on the ones I have checked.

"Hachiroku" <Trueno@ae86.GTS> wrote in message
news:ao1Of.25$ky1.14@trndny06...[color=blue]
>
> "Ray O" <rokigawa@tristarassociatesDOTcomn> wrote in message
> news:b2a6e$44089abf$44a4a10d$31401@msgid.meganewsservers.com...[color=green]
>>
>>
>> "QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
>> news:tuug02l0h9uo7fnh4d7efgsb3iaipakl82@4ax.com...[color=darkred]
>>> Thanks Ray, read 2 comments below interspersed with your text. QE
>>>
>>> On Fri, 3 Mar 2006 10:34:16 -0600, "Ray O"
>>> <rokigawa@tristarassociatesDOTcomn> wrote:
>>>
>>> |
>>> |"QuienEs" <QuienEsREMOVETHIS@ANDTHISatt.net> wrote in message
>>> |news:v8lg021gi37nv9vb9gj47jipcc9khb6fbi@4ax.com...
>>> |> Van is 2000 Sienna w/California emissions, made 07/2000 -
>>> |> engine is 1MZ-FE,
>>> |>
>>> |> Looked around underneath and found one O2 sensor between the cat
>>> and
>>> |> the engine, and one after the cat, toward the rear of the van.
>>> |>
>>> |> I've spent a lot of time online and with online vendors' help ppl
>>> and
>>> |> received somewhat contradictory information about what will do the
>>> |> job.
>>> |>
>>> |> 2 questions:
>>> |>
>>> |> 1/ Are there actually TWO O2 sensors between the cat and the
>>> engine -
>>> |> vendors' sites seem to suggest this - saying "2 required" ? As
>>> above,
>>> |> I saw only one [towards the passenger side] but wasn't looking for
>>> a
>>> |> 2nd one at the time.
>>> |
>>> |There is one O2 sensor per bank between the cat and the engine. On a
>>> V-6
>>> |engine with 2 banks, you would have 2 O2 sensors before the cat.
>>>
>>> I read that to mean that besides the Air/Fuel sensor [ which is very
>>> visable] on the exhaust manifold close to the radiator there is an O2
>>> sensor somewhere on that manifold or whatever it becomes on its way to
>>> the cat, that I have not yet discovered - will look when wife returns
>>> home with the van. Thanks. Info on Bosch universals below.[/color]
>>
>> Think of an engine bank as an independent engine - in other words, in a
>> V-6 engine, you would have two 3-cylinder engines that are connected at
>> the bottom. Each of the two engines/banks has two O2 sensors.
>>
>> O2 sensor #1 is closest to the engine and measures the amount of oxygen
>> in the exhaust and vehicle's electronic control unit (ECU) adjusts how
>> much fuel gets mixed with the air based on what the O2 sensor is telling
>> it.
>>
>> O2 sensor #2 is after, or downstream of the catalytic converter. It is
>> also measuring the oxygen in the exhaust and is basically there to make
>> sure that the cat is doing its job. If the cat is not cleaning up the
>> exhaust, then O2 sensor #2 would sense it and let the ECU know.
>>
>> Each cylinder bank has O2 sensor #1 and O2 sensor #2. Besides the O2 #1
>> sensor visible in the exhaust manifold near the radiator (Bank 2), there
>> is another one in the exhaust manifold near the firewall (bank 1).
>>
>> As far as i know, there is not a 3rd one in the system, unless that is
>> something new.
>>[color=darkred]
>>> |>
>>> |> 2/ I am a electronics buff and ham-radio operator who would have
>>> no
>>> |> trouble doing the cut and splice wiring job required to install the
>>> |> much less expensive Bosch Universal sensor[s]. Does anyone know
>>> if
>>> |> they will work with the Calif. emissions engine ?
>>> |>
>>> |> TIA, QE in NJ
>>> |
>>> |I have no experience with Bosch universal sensors so I can't comment
>>> |on how they work, but if you are going to try one, I suggest cutting
>>> |the pigtail off of the old sensor and splice it to the new sensor so
>>> |that you don't mess with the harness to the ECU. You then have the
>>> |option of going back to a factory O2 sensor without any problems.
>>>
>>> Not having seen one, you guessed it anyway :-) !! That's exactly how
>>> they work. Here's a link to the installation guide for Bosch
>>> Universals, which sell online for less than $70 delivered.
>>>
>>> [url]http://www.boschusa.com/images/OxygenSensorInstall.pdf[/url]
>>>
>>> QE
>>>[/color]
>>
>> Check your local Toyota dealer for the price of an OEM O2 sensor. I may
>> be wrong, but I don't think they are that much more than an aftermarket
>> one.
>>
>> Good luck!
>> --
>>
>> Ray O
>> (correct punctuation to reply)
>>[/color]
>
>
> Last I knew, the Bosch's were running anywhere from $19 to $149, and the
> OEMs were around $135-175 on the ones I have checked.[/color]

I guess it's been a while since I checked on O2 sensor prices!
--

Ray O
(correct punctuation to reply)

Actually, even the Bosch Universal sensors are fairly expensive for the
Sienna...

[url]https://www.automedicsupply.com/catalog4.php?PHPSESSID=f46a0986cb417976b6c1b4b6ce1e6fdd[/url]

For those prices, I'm guessing you can probably buy an OEM Toyota
replacement.

Cheers,
Nirav

Sorry i didn't get back to you yesterday, Quienes, I was out of town. If
you have a Cali emnissions vehicle, then the sensor in your exhaust stream
is very different than a regular oxygen sensor. They are called air/fuel
ratio sensors, and there are fundemental differences in how they work in
their construction the circuit to the ECM in the vehicle. I don't have any
experiences with aftermarket AF sensors, but if you go with a Bosch or
other brand you should do your research and make sure that they
specifically say their unit is compatible with your car.
Expect to pay a bit, too. OEM AF sensors are about 240$ (at least at my
dealer ship). We always see the rear bank on your sienna go first and more
often than the front. I guess it has something to do with the heatbuildup
back there while running.

On Sat, 04 Mar 2006 09:16:11 -0500, "qslim" <Suckers@suckersdotcom>
wrote:
[color=blue]
>Sorry i didn't get back to you yesterday, Quienes, I was out of town. If
>you have a Cali emnissions vehicle, then the sensor in your exhaust stream
>is very different than a regular oxygen sensor. They are called air/fuel
>ratio sensors, and there are fundemental differences in how they work in
>their construction the circuit to the ECM in the vehicle. I don't have any
>experiences with aftermarket AF sensors, but if you go with a Bosch or
>other brand you should do your research and make sure that they
>specifically say their unit is compatible with your car.
> Expect to pay a bit, too. OEM AF sensors are about 240$ (at least at my
>dealer ship). We always see the rear bank on your sienna go first and more
>often than the front. I guess it has something to do with the heatbuildup
>back there while running.[/color]

I wonder if a simple air duct to the sensor might make them last
longer?

--

Scott in Florida

On Sat, 04 Mar 2006 09:16:11 -0500, "qslim" <Suckers@suckersdotcom>
wrote:

|Sorry i didn't get back to you yesterday, Quienes, I was out of town.
If
|you have a Cali emnissions vehicle, then the sensor in your exhaust
stream
|is very different than a regular oxygen sensor. They are called
air/fuel
|ratio sensors, and there are fundemental differences in how they work
in
|their construction the circuit to the ECM in the vehicle. I don't
have any
|experiences with aftermarket AF sensors, but if you go with a Bosch
or
|other brand you should do your research and make sure that they
|specifically say their unit is compatible with your car.
| Expect to pay a bit, too. OEM AF sensors are about 240$ (at least
at my
|dealer ship). We always see the rear bank on your sienna go first and
more
|often than the front. I guess it has something to do with the
heatbuildup
|back there while running.
=====================
Thanks Qslim for the above information, which has finally solved a lot
of confusion. Since the code readout device my tech used said
"B1S1 O2 sensor" all my searching around for pricing etc has been
for *oxygen* sensors. Having looked at the Toyota box I can see that
the one he replaced in the front by mistake was an AF sensor, p/n
89467-41011, as in the one he took out, per numbers around the
thimble. So I have an extra, good used one for some day
in the future. Next week I think I'll bite the bullet and spring for
an OEM AF sensor for the rear bank - because he made a mistake 1st
time around, he isn't going to charge me labor for what looks like a
bear of a job. Should it turn out to have the same p/n [not likely]
we'll just put the new one from the front in the rear and the old one
back in the front.

It has been a real pleasure receiving your on-target advice, thank
you again and keep up the good work in this ng.

QE in NJ