02 Censor Bank 2 Sensor 1
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Driver School Candidate
Joined: Mar 2019
Posts: 3
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From: arizona
02 Censor Bank 2 Sensor 1
I want to make sure I replace the correct one before I go underneath the hood and start yanking 02 sensors out lol. Any ideas where I might be able to find a diagram or pics or anything to figure which one is the bank 2 sensor 1?
03 Lexus Gs300
Thank you in advance!
03 Lexus Gs300
Thank you in advance!
Lead Lap
Joined: May 2015
Posts: 449
Likes: 49
From: Illinois
Bank 1 is the first cylinder in the firing order (closest to the front of the motor in this case). Bank 2 is the second cylinder in the ignition firing sequence which is closer to the rear of the motor.
Sensor 1 is before the catalytic converter also known as the upstream oxygen sensor.
Sensor 1 is before the catalytic converter also known as the upstream oxygen sensor.
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Joined: Mar 2016
Posts: 520
Likes: 34
From: MI
Bank 1 is the first cylinder in the firing order (closest to the front of the motor in this case). Bank 2 is the second cylinder in the ignition firing sequence which is closer to the rear of the motor.
Sensor 1 is before the catalytic converter also known as the upstream oxygen sensor.
Sensor 1 is before the catalytic converter also known as the upstream oxygen sensor.
Appears on the GS3, bank-1 is the front 3-cylinders, and bank-2 is the back 3-cylinders. Both sensor-1's appear to be on the exhaust manifold, before the cat... upstream. Both sensor-2's appear to be on the flex-pipe, after the cat... downstream.
So it appears you want the front exhaust manifold's O2 sensor.
Ironic, give that on the GS4, the only O2 sensors to go bad (so far) are the downstreams.
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