Where is Knock sensor Toyota Previa '93 - Above or beneath engine

SOURCE: Location of knock sensor on 1994 toyota 22vre engine

The Knock sensor on a 22re is located under the intake manifold on the engine block. to the upper left of the oil filter. With is the passenger side of the engine. I believe it is yellow in color. Not do be confused with the oil pressure sensor which is close by. The knock sensor has a larger electrical connector. Good luck it can be hard to get to.

SOURCE: Need to locate knock sensor on 1999 camry V6. Where is located.

i have toyota windom 4vz-fe i need locate knock sensor

SOURCE: 91 Toyota Previa AWD - Swap original engine for Previa Supercharged engine

I do a lot of work on Toyota Previa before; including rebuilt engine, swapping engine and transmission and lot of things in between, but never swap a normal aspirated engine to a supercharged engine or diesel. Since i have some experience in Previa, I would like to share my opinion with you regarding your plan to swapping the normal aspirated Previa engine to a Supercharged engine. When you do a swapp like that, you will not only be dealing with just swapping engine, but some wiring, computer, throttle body, air cleaner assembly, extra frame and pulley on the accessory items, transmission as well as a right rear end to get the correct gear ratio to accomodate the new engine and transmission. I can go on even more, but let me tell you this, beside less headache, it would definitely cheaper if you were to find a Supercharged Previa and fix it up. However, if you are totally motivated to do this project, keep in mind, this engine swap will be a long term and time consuming project.l I wish you best of luck and have fun!

SOURCE: 2005 Toyota Camry - knock sensor

Your sensor went off because it overknocked.
Try using a different type of fuel with a higher octane.
Erase the code and use the better gas. if it comes back then we will worry about replacing it.