Tip & How-To about 2001 Pontiac Aztek

Where is O2 oxygen sensor Bank 1 sensor 2 on Pontiac Atzec.

Hi.


The sensor two is the one located after the catalytic converter. While sensor one is always the O2 sensor located on the engine side.


Bankone refer to the sensor located in line with cylinder number one (theone that is sparking first i order). The firing order on Pontiac Atzec is as follows:

on the 4 Cylinder engine : 1-3-4-2

on the 6 Cylider version : 1-6-5-4-3-2,

This means that the cylindernumber one is located on the left hand side.

See the diagram below explaining how to access sensor two. The protective cover is not present on all models:






Note: before replacing the O2 sensor (lambda sensor) ensure that the problem is not wiring or connector.


.

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1 Answer

How many o2 oxygen sensors does a Mazda 2002 MPV LX have


Four. There are two located before the catalytic converters and two after the catalytic converters.

The are referred to as bank 1 and bank 2 and sensor 1 or sensor two. Bank 1 is always the same side of the engine as the number one cylinder. Bank 2 is the other side. Sensor 1 is always before the catalytic converter. Sensor 2 is after the catalytic converter.

  • Bank 1 sensor 1 - same side of the engine as the number one cylinder and before the cat.
  • Bank 1 sensor 2 - same side of the engine as number 1 cylinder, after the cat.
  • Bank 2 sensor 1 - Opposite side of the engine as the number one cylinder and before the cat.
  • Bank 2 sensor 2 - Opposite side of the engine from number 1 cylinder and after the cat.

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There is 4 senors the bank 1 sensor 1 is located in front of the LH (Drivers side) catalytic converter
Hope this helps

Jun 22, 2014 | 2004 Ford Freestar

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how many oxygen sensors does a 2004 endevor v6 have


Hi there:
There is a sensor located before a emission device called a catalytic converter that is located on both sides. The sensors in the back of the engine are called O2 sensor 1 bank one, (sensor before the catalytic converter) and O2 sensor 2 bank one (located after the converter).

On the front of the engine, going down you have two as well for there is a converter on both sides. first one coming from the engine is O2 sensor 1 bank 2 and then your failed one after the converter, O2 sensor 2 bank 2.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

Feb 17, 2012 | Cars & Trucks

1 Answer

how many oxygen sensors does a 2004 endevor have


Hi Santiago:
There is a sensor located before a emission device called a catalytic converter that is located on both sides. The sensors in the back of the engine are called O2 sensor 1 bank one, (sensor before the catalytic converter) and O2 sensor 2 bank one (located after the converter).

On the front of the engine, going down you have two as well for there is a converter on both sides. first one coming from the engine is O2 sensor 1 bank 2 and then your failed one after the converter, O2 sensor 2 bank 2.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

Feb 17, 2012 | 2004 Mitsubishi Endeavor

2 Answers

location of oxygen sensor


Under the truck, driver side exhaust pipe, there are 2, 1 is before the catalytic converter, the other is after. They screw into the side of the exhaust pipe.

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