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I got a # for an engine and need to have it decoded. engine#GM1231738/left bank of motor#40X138638/top of manifold#B-1231718-E(all off a buick wildcat 1970)

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GM1231738 is the engine code for a 1970 Buick 455 engine.

Posted on Aug 24, 2010

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Location of bank 1 sensor 1 o2 sensor 0n a 6 cylinder jeep grand Cherokee laredo


bank one is left side top of engine standing looking at it , O2 sensor is located on exhaust manifold there is one on each manifold (right-left)

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Where is the oxygen sensor on a 2006 Buick rendezvous 3.5 engine


There are four O2 sensors on your vehicle. Two for each bank of the engine. There will be one between the exhaust manifold and the catalytic converter and one near the end or just after the catalytic converter for each bank. If you are receiving a DTC indicating a sensor is bad, you need to see which sensor the code indicates. It will say something like bank 2 sensor 1.

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Where are freeze plugs for a 1993 Ford ranger?


there are three located just below exhaust manifolds outlets on each side (six total) , they do require a special tool to remove/ install them correctly and a engine rated sealant as well too keep them in place they are avail for purchase individually but in sets as well

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Trying to find oxygen sensor for port 1 sensor 1. Where is it located on the motor?


Bank 1 Sensor 1: Located on rear exhaust manifold pipe nearest the firewall. Fairly easy to remove with the right tools. Clip located on left side of engine compartment.

Feb 01, 2011 | 2000 Buick Century

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I need to know exactly where the bank one sensor two o2 sensor is on a 1999 lexus ls400


Bank 1 sensor 1 --- on left side of engine in exaust manifold .
Bank 1 sensor 2----- on exaust system near converter
Bank 2 sensor 1----- on right side of engine in exaust manifold
Bank 2 sensor 2 ----- on exaust manifold near converter

Dec 25, 2010 | 2000 Lexus LS 400

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Need to know were the bank one , sencer one is on my buick century 2000 v6


Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2

Some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2

Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.

Sensor 1 is always the upstream sensor (The one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.

Hope helps (remember to rate this).

Oct 07, 2010 | 2000 Buick Century

1 Answer

Where is the O2 sensor Bank 1, Sensor 1 located on the engine?


in teh exhaust manifold or top of the down pipe ,bank 1 is the left hand side

Mar 29, 2010 | 1999 Buick Park Avenue

1 Answer

O2 sensor, number 1. Where is it located & how do you replace it?


Hello musiccitywom: My name is roger and I will help you. Sensor 1 bank one is located in the left down pipe from the left exhaust manifold. Sensor one bank 2 is located in the right exhaust manifold down pipe. Mechanics identify left and right side of the motor while seated in the drivers seat. Or you will find the left side of the engine on the same side as the steering wheel.
Should you need further help please just ask. Please rate the quality of the answer. This way I know the information helped. Thank You for using Fix Ya. Roger

Oct 13, 2009 | 2001 Chevrolet Silverado 1500

5 Answers

Need to locate o2 sensor location bank 1 sensor 2. I replaced the one on top nearest the radiator, but still getting o2 error code for a different one. Need to find its location on a Hyundai Accent 2000


You need to check two things.

First, there is a heat shield on top of the front of the motor where the o2 sensor you already replaced is. It's got (4) 12mm bolts. Remove it and check the exhaust manifold (big thing you put the o2 sensor into) for cracks. If there are any cracks, you'll get o2 sensor codes. Replace the manifold.

Second, if the manifold is fine start the car and listen to the exhaust pipe under the engine for leaks. Or if you already know the exhaust is loud... that's gonna do it too. A leaking exhaust pipe on an Accent will set secondary o2 sensor codes.

SHOULD you try to change it yourself, you will need a 7/8" wrench, and a new o2 sensor, or flex pipe, or manifold depending on what's broke. Do NOT touch the tip of the new or old o2 sensor to ANYTHING when you take it out or install it or it will be ruined permanently. Run the car until it's at it's normal operating temperature. Raise the vehicle, and take the o2 sensor out of the car (see below to understand which one) using the 7/8" wrench or if you got fancy and bought an 02 sensor tool... use it.

Replace whatever parts are bad (manifold or pipe) or just replace the sensor you need. Then restart the car and take it to a parts store and have them clear the code. The code (and check engine light) won't return right away, it usually takes a few days. If you did everything right you should be good. If not, it's not a terribly expensive job to have done and by now you should be able to explain to them what's wrong based on what you found when you looked at the car. Just tell them everything you checked and what you saw.

Education: I'm not sure where that half baked answer about o2 sensor 1 being near cylinder one came from but here's the real deal.

Sensor 1 is always BEFORE the catalytic converter
Sensor 2 is always AFTER the catalytic converter

Bank 1 and Bank 2 refer to which SIDE of the exhaust on 6 and 8 cylinder engines. Bank 1 is usually left side, Bank 2 is usually right side.

So... O2 sensor B1S1 refers to the O2 sensor BEFORE the converter on the LEFT side of the motor.

Oct 06, 2009 | 2000 Hyundai Accent

1 Answer

O2 sensors on 2002 buick rendezvous


hi im wes the o2 sensor is always in the exaust newer buicks have one before the converter (sometimes in the exaust manifold) one after the converter if it has duall exaust it could have four
left bank sensor one is before the converter on drivers side bank two sensor 2 would be passanger side after the converter does this help?

Mar 12, 2009 | 2002 Buick Rendezvous

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