The Nissan gurus put the knock sensor on the car for a reason. Unfortunately it uses the engine block for the ground and only one wire of the two in the harness is live. The knock sensor is not the easiest piece of equipment to get to so many people either live with the knock sensor being bad or bypass it. Once you get to the sensor, you can clean the engine block and the bottom of the sensor and reinstall. That cures the problem in many cases. The most effective safe way to fix the knock sensor is to replace it. If you want to take your chances you can research knock sensor bypass in your favorite search engine. There are a lot of articles with step by step directions so I doubt the procedure needs to be repeated here.
You should not bypass the relay. Repair the problem.
If your security sensor in your 2001 Nissan Sentra 2.0 is jarred or jammed you should have it replaced.
Its In The Boot Of The Car And Should Be On The Side
it should be in the distrubator
YES it does. It should be close to intake.
you probably have a leaking heater core....you can replace it or bypass it
It is definitely not a good idea to bypass the sensor. If you have the 22re engine, then replacing the sensor or the wiring is trivial. Not so on the 3vze. The sensor is located under the upper and lower intake. So, for a quick bypass you can buy a new sensor and attach it to one of the engine mounts (there should be one on the drivers side, a couple of inches from the wiring harness). You can either drill through the mount, or bolt the sensor inside the loop of the hook. Note, this is a very temporary "fix". In this location, the sensor will not be able to perform its job. Be warned!
Once all the tires are inflated to the specified pressure the sensor light should go out after a few miles.
Nope. If you do you should email the company about it
around $1000 us
The connector should be by floor next to buckle
did the heater core start leaking? anyway you should have no problem with the air if you bypass the heater core.