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Where is the bank 2 sensor 1 (oxygen sensor) located on a 2001 mercury grand marquis

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  • Cars & Trucks Master
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See the diagram attached. God bless you


where is the bank 2 sensor 1 (oxygen sensor) locat - 5_22_2012_10_56_03_am.gif

Posted on May 22, 2012

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6 Suggested Answers

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Posted on Jan 02, 2017

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warlock61
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SOURCE: Oxygen Sensors

ok Bank 1 is the rear bank and bank 2 is the front bank sensor 1 in each bank is the one closest to the manifold they have green connectors sensor 2 is the sensor after the cat converter and is a blue connector

Posted on Dec 02, 2008

blueextc3221
  • 15935 Answers

SOURCE: need to know placement of heated oxygen sensor

The O2 sensors are located in the exhaust piping.
One (bank 1) is on the engine side of the Catalytic convertor.
Second (bank 2) is on the other side (exhaust end).

There are manufacturers that make universal fits that will go in either location. Be sure to specify the rear sensor when you go to the parts store.

It will look like this....

cfea0cf.jpg
It threads right into the exhaust pipe.

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Posted on Mar 05, 2009

emissionwiz
  • 83959 Answers

SOURCE: Replacing bank 1 sensor 2 and bank 2 sensor 1 oxygen sensors

BANK ONE IS THE REAR BANK OF CYLINDERS AND TWO THE FRONT BANK

Posted on Jun 24, 2009

dttech
  • 4803 Answers

SOURCE: where is the bank 2 sensor 1 located.

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.

Most GM engines have #1 cylinder located on the left bank, (or Driver's Side) of the engine,

So, the answer to your question would be that you are looking for the sensor located before the catalytic converter on the right (or Passenger Side) of the truck.

Posted on Oct 17, 2009

bschilz
  • 2049 Answers

SOURCE: location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape

B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank.
S1 means the sensor is located BEFORE the catalytic converter
S2 means the sensor is located AFTER the catalytic converter

You didn't say which engine you have, so I've included the diagrams of both 4 cyl and 6 cyl so you can see the banks

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Posted on Oct 20, 2009

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  • or bank two downstream
it will be easier if you have an O2 socket

Basically you just disconnect the sensor
turn the old one to the left
and remove

However, expect to use a lot of muscle and possibility some heat too

These things get tight

Sometimes you even have to break out the big pipe wrench

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