Hi folks,
I know I posted about this some time ago, but that was on another computer
in another world. I ask that you indulge me again please, thanks. After
running it this way with no problem for a time, I need to get it through
inspection now and thus am actually addressing the issue now.

98 Sienna 190K miles with the code P0155 Bank 2 Sensor 1.

Is this for the front sensor or the rear sensor?

Where is the sensor on the vehicle?

Any tricks I need to know to replace it?

Best place to buy it?

I remember from the discussion that getting an OEM part is the best way to
go and that it was more $$ but not all that much more and it has the right
connections. I have been googling around a bit and I see a series of Bosch
O2 sensors that are either generic or have the right connector. Are the
Bosch sensors what Toyota uses or do they use something else?

I think that is it for now. If I ought to be asking anything else please
let me know, thanks.
Tomes

"Tomes" <ask.me@here.net> wrote in message
news:ftehn1$dp5$1@registered.motzarella.org...
> Hi folks,
> I know I posted about this some time ago, but that was on another computer
> in another world. I ask that you indulge me again please, thanks. After
> running it this way with no problem for a time, I need to get it through
> inspection now and thus am actually addressing the issue now.
>
> 98 Sienna 190K miles with the code P0155 Bank 2 Sensor 1.
>

Bank 2, Sensor 1 is before the CAT on the side that does not contain the #1
cylinder. On a V-motor, Bank 1 contains Piston #1, Bank 2 contains the other
side of the motor. (Some makers number 1,2,3 on a side, others number 1,3,5
on a side. I'm not sure how Toyota numbers, but Bank 1 contains Cyhlinder 1
and that is good enough to find Bank 2.)



> Is this for the front sensor or the rear sensor?
>

Sensor 1 is before the CAT


> Where is the sensor on the vehicle?
>

On the exhaust system after where the tubes to each cylinder come together,
but before the CAT, and before where the exhaust manifold from the other
side of the motor ties in.



> Any tricks I need to know to replace it?
>

When you buy the new sesnor, buy a "sensor socket." This tool looks kinda
like a spark plug socket, except a side is cut off. This hole in the side of
the socket gives a place for the wire to be. Put some anti-seize compound on
the threads, making sure to not put compound on the sensor head. Buy a
sensor with the connector already installed. The single biggest problem with
splicing the connector from the old sensor to the new one is a bad splice
causing erratic circuit operation.




P0155
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

"Tomes" <ask.me@here.net> wrote in message
news:ftehn1$dp5$1@registered.motzarella.org...
> Hi folks,
> I know I posted about this some time ago, but that was on another computer
> in another world. I ask that you indulge me again please, thanks. After
> running it this way with no problem for a time, I need to get it through
> inspection now and thus am actually addressing the issue now.
>
> 98 Sienna 190K miles with the code P0155 Bank 2 Sensor 1.
>
> Is this for the front sensor or the rear sensor?
>
> Where is the sensor on the vehicle?
>
> Any tricks I need to know to replace it?
>
> Best place to buy it?
>
> I remember from the discussion that getting an OEM part is the best way to
> go and that it was more $$ but not all that much more and it has the right
> connections. I have been googling around a bit and I see a series of
> Bosch O2 sensors that are either generic or have the right connector. Are
> the Bosch sensors what Toyota uses or do they use something else?
>
> I think that is it for now. If I ought to be asking anything else please
> let me know, thanks.
> Tomes
>

Bank 2 Sensor 1 is the sensor that comes off of the front exhaust manifold.
If you look at the front exhaust manifold, you should see a pigtail coming
off of the right side of the manifold just above where the exhaust pipe
attaches.

There is a guy in the Toyota Yahoo group that talks about this on line
source for Toyota parts:

"For oem Toyota parts, check www.1sttoyotaparts.com (888-271-3948), Bob
Bridge Toyota in Wash. state. Very good prices (comparable to NAPA) and
service. If you call, identify yourself as an internet customer to get
internet prices. Good luck."

If the original part lasted 190K miles, then there is a pretty good chance
that a replacement OEM part will last about the same length of time.
Toyota's OEM supplier is Denso. An aftermarket part may or may not last
longer. If you go aftermarket, get the kind with the factory connection so
you do not have to splice wires, because improperly spliced wires often
cause problems.
--

Ray O
(correct punctuation to reply)

"Ray O" ...
> "Tomes" ...
>> Hi folks,
>> I know I posted about this some time ago, but that was on another
>> computer in another world. I ask that you indulge me again please,
>> thanks. After running it this way with no problem for a time, I need to
>> get it through inspection now and thus am actually addressing the issue
>> now.
>>
>> 98 Sienna 190K miles with the code P0155 Bank 2 Sensor 1.
>>
>> Is this for the front sensor or the rear sensor?
>>
>> Where is the sensor on the vehicle?
>>
>> Any tricks I need to know to replace it?
>>
>> Best place to buy it?
>>
>> I remember from the discussion that getting an OEM part is the best way
>> to go and that it was more $$ but not all that much more and it has the
>> right connections. I have been googling around a bit and I see a series
>> of Bosch O2 sensors that are either generic or have the right connector.
>> Are the Bosch sensors what Toyota uses or do they use something else?
>>
>> I think that is it for now. If I ought to be asking anything else please
>> let me know, thanks.
>> Tomes
>>
>
> Bank 2 Sensor 1 is the sensor that comes off of the front exhaust
> manifold. If you look at the front exhaust manifold, you should see a
> pigtail coming off of the right side of the manifold just above where the
> exhaust pipe attaches.
>
> There is a guy in the Toyota Yahoo group that talks about this on line
> source for Toyota parts:
>
> "For oem Toyota parts, check www.1sttoyotaparts.com (888-271-3948), Bob
> Bridge Toyota in Wash. state. Very good prices (comparable to NAPA) and
> service. If you call, identify yourself as an internet customer to get
> internet prices. Good luck."
>
> If the original part lasted 190K miles, then there is a pretty good chance
> that a replacement OEM part will last about the same length of time.
> Toyota's OEM supplier is Denso. An aftermarket part may or may not last
> longer. If you go aftermarket, get the kind with the factory connection
> so you do not have to splice wires, because improperly spliced wires often
> cause problems.

Thanks to all 3 of you guys. I will let you know how putting it on goes.
Tomes

"Tomes" <ask.me@here.net> wrote in message
news:fth92l$kti$1@registered.motzarella.org...
> "Ray O" ...
>> "Tomes" ...
>>> Hi folks,
>>> I know I posted about this some time ago, but that was on another
>>> computer in another world. I ask that you indulge me again please,
>>> thanks. After running it this way with no problem for a time, I need to
>>> get it through inspection now and thus am actually addressing the issue
>>> now.
>>>
>>> 98 Sienna 190K miles with the code P0155 Bank 2 Sensor 1.
>>>
>>> Is this for the front sensor or the rear sensor?
>>>
>>> Where is the sensor on the vehicle?
>>>
>>> Any tricks I need to know to replace it?
>>>
>>> Best place to buy it?
>>>
>>> I remember from the discussion that getting an OEM part is the best way
>>> to go and that it was more $$ but not all that much more and it has the
>>> right connections. I have been googling around a bit and I see a series
>>> of Bosch O2 sensors that are either generic or have the right connector.
>>> Are the Bosch sensors what Toyota uses or do they use something else?
>>>
>>> I think that is it for now. If I ought to be asking anything else
>>> please let me know, thanks.
>>> Tomes
>>>
>>
>> Bank 2 Sensor 1 is the sensor that comes off of the front exhaust
>> manifold. If you look at the front exhaust manifold, you should see a
>> pigtail coming off of the right side of the manifold just above where the
>> exhaust pipe attaches.
>>
>> There is a guy in the Toyota Yahoo group that talks about this on line
>> source for Toyota parts:
>>
>> "For oem Toyota parts, check www.1sttoyotaparts.com (888-271-3948), Bob
>> Bridge Toyota in Wash. state. Very good prices (comparable to NAPA) and
>> service. If you call, identify yourself as an internet customer to get
>> internet prices. Good luck."
>>
>> If the original part lasted 190K miles, then there is a pretty good
>> chance that a replacement OEM part will last about the same length of
>> time. Toyota's OEM supplier is Denso. An aftermarket part may or may not
>> last longer. If you go aftermarket, get the kind with the factory
>> connection so you do not have to splice wires, because improperly spliced
>> wires often cause problems.
>
> Thanks to all 3 of you guys. I will let you know how putting it on goes.
> Tomes

You're welcome! BTW, one more trick: spray some penetrating fluid (PB
Blaster works well) the night before you attempt the repair and gently tap
the manifold near where the sensor mounts. Be stingy with the fluid and
wipe off any that runs down the manifold so you don't have a fire. When you
loosen the sensor, turn it just enough to break it loose, spray a little
more penetrating fluid, being sure to wipe off the excess, then remove the
sensor. You don't want to strip the threads on the manifold or you will
need a new one. Once you get the sensor off, wipe as much penetrating fluid
off as you can to reduce the possibility that the replacement sensor will be
affected by the fumes and to reduce the possibility of the stuff catching
fire on the hot manifold.
--

Ray O
(correct punctuation to reply)

"Ray O" ...
> "Tomes" ...
>> "Ray O" ...
>>> "Tomes" ...
>>>> Hi folks,
>>>> I know I posted about this some time ago, but that was on another
>>>> computer in another world. I ask that you indulge me again please,
>>>> thanks. After running it this way with no problem for a time, I need
>>>> to get it through inspection now and thus am actually addressing the
>>>> issue now.
>>>>
>>>> 98 Sienna 190K miles with the code P0155 Bank 2 Sensor 1.
>>>>
>>>> Is this for the front sensor or the rear sensor?
>>>>
>>>> Where is the sensor on the vehicle?
>>>>
>>>> Any tricks I need to know to replace it?
>>>>
>>>> Best place to buy it?
>>>>
>>>> I remember from the discussion that getting an OEM part is the best way
>>>> to go and that it was more $$ but not all that much more and it has the
>>>> right connections. I have been googling around a bit and I see a
>>>> series of Bosch O2 sensors that are either generic or have the right
>>>> connector. Are the Bosch sensors what Toyota uses or do they use
>>>> something else?
>>>>
>>>> I think that is it for now. If I ought to be asking anything else
>>>> please let me know, thanks.
>>>> Tomes
>>>>
>>>
>>> Bank 2 Sensor 1 is the sensor that comes off of the front exhaust
>>> manifold. If you look at the front exhaust manifold, you should see a
>>> pigtail coming off of the right side of the manifold just above where
>>> the exhaust pipe attaches.
>>>
>>> There is a guy in the Toyota Yahoo group that talks about this on line
>>> source for Toyota parts:
>>>
>>> "For oem Toyota parts, check www.1sttoyotaparts.com (888-271-3948), Bob
>>> Bridge Toyota in Wash. state. Very good prices (comparable to NAPA) and
>>> service. If you call, identify yourself as an internet customer to get
>>> internet prices. Good luck."
>>>
>>> If the original part lasted 190K miles, then there is a pretty good
>>> chance that a replacement OEM part will last about the same length of
>>> time. Toyota's OEM supplier is Denso. An aftermarket part may or may
>>> not last longer. If you go aftermarket, get the kind with the factory
>>> connection so you do not have to splice wires, because improperly
>>> spliced wires often cause problems.
>>
>> Thanks to all 3 of you guys. I will let you know how putting it on goes.
>> Tomes
>
> You're welcome! BTW, one more trick: spray some penetrating fluid (PB
> Blaster works well) the night before you attempt the repair and gently tap
> the manifold near where the sensor mounts. Be stingy with the fluid and
> wipe off any that runs down the manifold so you don't have a fire. When
> you loosen the sensor, turn it just enough to break it loose, spray a
> little more penetrating fluid, being sure to wipe off the excess, then
> remove the sensor. You don't want to strip the threads on the manifold or
> you will need a new one. Once you get the sensor off, wipe as much
> penetrating fluid off as you can to reduce the possibility that the
> replacement sensor will be affected by the fumes and to reduce the
> possibility of the stuff catching fire on the hot manifold.
>
OK, thanks Ray. I will do this. PB Blaster is indeed my friend....
Tomes