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On a lexus rx330 bank one sensor 1 is upstream or downstream

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It is upstream

Posted on May 08, 2019

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Bank 1 sensor 1 is an upstream on driver side (Cylinder 123) sensor 2 is downstream Bank 2 is on Passenger side, ***** sensor 1 is always an upstream*****

Posted on May 08, 2019

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UPSTREAM OF COURSE

Posted on Dec 30, 2018

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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SOURCE: oxygen sensor confusion

1/1 is upstream sensor on the number 1 cylinder side, 1/2 is the downstream of the number 1 cylinder side, 2/1 is the upstream of the number 2 cylinder side, 2/2 is the downstream of the number 2 cylinder side. Hope this helps.

Posted on Aug 10, 2009

Testimonial: "sorry, I hit the submit testimonial button before thanking both of you who so promptly answered. "

SOURCE: Getting PO141 trouble code when scanning! Car '03 accord, 2.4 ltr

i spoke to a honda tech , and he confirmed code p0141 on the 4cylinder model is the second sensor.

Posted on Aug 28, 2009

  • 97 Answers

SOURCE: 420 code catalyst system efficiency below

You could have an enefficient converter. Question is what caused it to go bad? I have attended seminars on code 420, Possible causes are lack of spark or clogged fuel injectors. there have been times where the spark plug wire lays on the engine and over time it wears a weak spot in the side of the wire, its not enough to throw a miss fire code but it keeps the full amount of spark from getting to the plug and not burning the all the fuel in the cyl. A leaky injector would also cause to much fuel to be deliverd into the cyl and not get burned.

Hope this helps.

Posted on Jan 20, 2010

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SOURCE: 04 sebring conv, 2.7 l V6, Trouble code for Bank 1

The O2 sensor is the left side (sitting in vehicle) downstream sensor. Also refered to as 1 / 2 sensor.

Posted on Dec 19, 2010

SOURCE: Honda ridgeline oxygen sensor bank 2 sensor 1;is

Here is how you guys can tell, which bank it is...Rule of thumb..Bank 1 is where the first piston firing order is.....Which in the Honda Ridgeline is in the rear...If you look at the motor its side ways ok...The best way to judge the first piston is to look at the spart plug cover....the one that is the closest to you is the first piston....Remember your looking at the engine as if it were straight, however honda ridgeline is side ways...So the front of the piston is on the passenger side...Ok...I hope this helps...

Posted on Sep 27, 2012

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1 Answer

2003 honda civic o2 how to replace And how do i fin out which once is it


Hi Jesus, Im AL the owner of Big As Auto Repair.

If you have a 4 cylinder engine then you will only have two 02 sensors 1/1 is upstream and 1/2 is downstream. Upstream is the one closet to the engine and downstream is the one farther away from the engine.

If you have a six OR eight cylinder engine you will have four 02 Sensors. 1/1 means Bank One Sensor One. 1/1 and Bank one means right bank and right bank means the side with the number 1 spark plug. SO, 1/1 means, "Right Bank" Upstream 02 sensor. 1/2 means, "Right Bank" Downstream 02 sensor.

2/1 means, "Left Bank" Upstream 02 sensor and 2/2 means, "Left Bank" Downstream 02 sensor. Hope this helps and please visit my auto-repair-website at: http://www.bigasautorepair.com/

Nov 26, 2015 | 2003 Honda Civic

2 Answers

Is the bank 2 sensor 1 oxygen sensor on a 2010 Saturn outlook on the upstream or down stream side?


The upstream on bank 2, which is the opposite of bank 1. Bank 1 is the side with the number 1 cylinder. Downstream oxygen sensors (after the cat converter) are always sensor 2, as in Bank 2, sensor 2.

Mar 19, 2015 | Saturn Cars & Trucks

1 Answer

What is the best way to remove O2 sensor bank 1 sensor 2?


Here is the low-down on oxygen sensors, and their location designations explained:

Oxygen sensors are screwed into the exhaust system at various points. Some people say that there are 4 oxygen sensors, but technically, that is not correct. Only the front 2 are considered oxygen sensors.

These oxygen sensors are screwed into the exhaust pipe or directly into the exhaust manifold, one on each bank. Because they are in front of the catalytic converter, this is often referred to as 'upstream'.

The other 2 are actually called catalyst monitors. They are oxygen sensors, but they serve a different purpose. They monitor the activities of the catalytic converters, thus the name, catalyst monitors. They are screwed into the exhaust one on each bank, after, or downstream, of the catalytic converters.

On a 4 cyl engine, there are only a total of two such sensors, the one in front of the catalytic converter is the O2 sensor, the one behind the cat is the catalyst monitor.

The location names for them are as follows:
  • On a 4 cyl, the front / upstream is called "bank 1 sensor 1" and the rear / downstream sensor is called "bank 1, sensor 2."

  • On a V6 or V8 engine:

    • the passenger side bank on a forward facing engine, or the bank closest to the firewall on a transverse mounted engine, is bank number 1, so the forward / upstream sensor on that bank would be "bank 1, sensor 1."

    • The driver's side bank (forward facing mount engine), or front bank (transverse engine) would be bank number 2, thus the forward / upstream sensor on that bank would be "bank 2, sensor 1," and the rearmost / downstream sensor on that bank would be "bank 2, sensor 2."

Jul 28, 2012 | 2004 Mitsubishi Endeavor

2 Answers

Which sensor is the bank 2 sensor 1 for a 2001 nissan sentra?


Unless I am missing something the 2001 nissan sentra has two four cylinder engine options.

The bank refers to which side of the engine. a four cylinder only has one bank so there can only be a bank 1. A v-6 or v-8 will have two banks since there is a bank of cylinders on each side of the engine. So there will be a bank 1 which is always the same side of the engine as the number one cylinder, and a bank 2 which is always the other side of the engine.

Sensor refers to upstream or downstream of the catalytic converter. Sensor one is upstream or before the cat. Sensor 2 is downstream or after the cat.

If you entered the wrong year or wrong vehicle or if you can post the actual code I will see if I can help you further.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Sep 17, 2011 | 2001 Nissan Sentra

1 Answer

03 santa fe code p0421 for warm up catalyst below bank 1is it converter sensors whats bank 1 converter location compared to bank 2 is there 2 banks or converters would it be upstream or downstream if it...


If the engine is a V6 (2.7 or 3.5 lit), bank 1 is next to the firewall (right hand) when facing the back of the engine.
If the engine is a 4 cly (I4), there is only one bank and is designated Bank 1 (exhaust manifold).

The catalyst to which the code refers is the UPSTREAM, and there is only ONE upstream cat for any bank.

Clue: Two upstream O2 sensor and two downstream O2 sensors - one before the CAT and one after the CAT. the downstream O2 sensors are identical to their upstream sisters. The only reason for the DOWNstream sensor is to monitor the CAT efficiency (threshold).

The catalyst on either bank is essentially the exhaust manifold which houses the CAT... it is the only CAT to which the code P0421 applies.

Hope that helped

Feb 06, 2011 | Hyundai Santa Fe Cars & Trucks

1 Answer

How many oxygen sensor on a 02 chevy blazer


Hi, there are 4 sensors on your truck--two upstream and 2 downstream. The upstream sensors are mounted in the exhaust manifolds and the downstream sensors are mounted just behind the catalytic converters. The upstream and downstream sensors are different. Bank 1 is on the driver's side and bank 2 is on the passenger's side. Please let me know if you have more questions, and thanks for using FixYa.

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Jan 01, 2011 | 2002 Chevrolet Blazer

1 Answer

Location of the bank 1 sensor 2 on th engine?


"banks" refer to the sides of the engine. Bank 1 is always the same side of the engine as cylinder number one. Bank 2 is always the other side of the engine.

"Sensor" refers to upstream or downstream of the catalytic converter. Sensor 1 is upstream of the cat and sensor 2 is downstream of the cat.

Bank 1 sensor 2 would be the same side of the engine as cylinder number 1 and downstream of the catalytic converter.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Dec 28, 2010 | 2000 Toyota Tundra

2 Answers

Where is bank 1 sensor 1 oxygen sensor 1999 ls400


1.Bank 1 is on the driver side.
2.Bank 2 is on the passenger side.
3.Sensor 1 is the upper sensor or upstream sensor in the manifold.
4.Sensor 2 is the downstream sensor.

Nov 06, 2009 | 2001 Lexus RX 300

2 Answers

Oxygen sensor confusion


1/1 is upstream sensor on the number 1 cylinder side, 1/2 is the downstream of the number 1 cylinder side, 2/1 is the upstream of the number 2 cylinder side, 2/2 is the downstream of the number 2 cylinder side. Hope this helps.

Aug 10, 2009 | 2003 Jeep Grand Cherokee

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