Question about 2002 Nissan Sentra

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O2 sensor out of range

I have a 2002 Nissan Sentra. I bought a Haynes book to find how to check to see which of the FOUR sensors are bad. The book gives the specs and how to check the sensor for the 3 wire and the 6 wire but neglected to provide which wires to check on the 4 wire. Can you tell me which wires to check on the 4 wire and the range I'm looking for?

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  • Jackson Hisey
    Jackson Hisey May 11, 2010

    Before going into detail about the O2 sensors and how to check them...

    Can you tell me why you are checking the O2 sensors?



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Go to a dealer, to the parts department. Someone there can point it out to you for free.

Posted on Jan 10, 2009


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My 2002 nissan sentra xe is giving codes po 420,133,153 and 462

po462 fuel level sensor,do you have two O2 sensors before catalytic con.Po420 will go off when you replace O2 sensors.

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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.

Sep 17, 2011 | 2001 Nissan Sentra

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Hi, I have a 2002 nissan sentra automatic 1.8. I bought it used when the mileage was 96,000. Now, it is 100,000. I read somewhere that I need to change the timing belt (if the car has it) when it reaches...

timing chain runs in oil and when it wears it clatters ,often its the adjuster needs changing only ,while its running ok leave well alone and do not look for problems that are not their ,change the oil every 6000miles with a oil filter every third oil change use the cheapest oil you can buy from a supermarket i prefer a diesel/petrol type oil of say 10/40 or 20/50 ,this will keep the inside of the engine clean and then i think it will run for ever without any problems .well i was trying to scan my alldata book on how to reset the service light but it seems to have locked up and i thionk i will need to restart computer ,did you get the four wires the right way around when you chande the O2 sensor

Nov 02, 2010 | 2002 Nissan Sentra

1 Answer

P0155 o2 sensor problem

its harness is third from left and has a white wire,its a (heated) four wire sensor. by looking down at engine from top you should see these sensors. you can track the white wire and see that it is under car, a 22mm wrench, or a sensor socket will do good to take out. use blaster or wd40 to make the task easier to take out! if in doubt, call any auto parts store and they should be able to set ya straight.

Jul 26, 2010 | 2002 Nissan Sentra

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Can't find the location for the crankshaft position sensor

you need a haynes manual . because crank sensor can be behind crank pulley or on bottom side of engine that why you need a manual save you time.

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My 2003 Nissan Sentra is getting terrible mileage

Two possible problems

1 - O2 Sensor

2 - Mass air flow sensor(Most common problem on Sentra's)

Spend a 100 buck and have a nissan dealer check it out for you as they would have the tools to check the sensors correctly

Nov 19, 2008 | 2003 Nissan Sentra

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