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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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.
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
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.