There is a sonsor that screws into the drive side of the engine block that i brok e when removing my engine, and i need to know what it is so i can buy a new one. It has a green tip, the only one ive seen with this. Does anyone know what it is?

Thanks

 

Knock sensor.

 

 

would this cause a VTEC malfunction?

 

A knock sensor failure or absence would not cause a VTEC malfunction CODE, but the VTEC effectiveness will be reduced and noticeable.

 

definitely a knock sensor, I paid 134$ shipped from majestic honda, others claim you can use odyssey or civic knock sensors(40-80$) but also others have stated that those sensors have been tuned to different frequencies. I just replaced mine a few months ago because the damn thing is extremely FRAGILE. It will not cause a vtec malfunction but you risk ruining your motor since knock will not be detected.