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I need to know where is located the knock sensor for honda accord 2001 vtec motor.

Henrry Quintanilla , From under the car you will see it bolted into the 2.3 engine by the oil filter/above. The link below may help. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. https://www.youtube.com/watch?v=7rvkr1ir

Ineed too know where is located the knock sensor for a honda accord 1998

It’s located on the rear of your motor right above your oil filter. For better clearance remove the oil filter and you we be able to see it from under the car