Location of the knock sensor on a 2001 Acura TL

Check this link out James. Fix Your Car With Your Own Hands Here's what it looks like. Duralast Knock Sensor SU4780 Read Reviews on Duralast SU4780

if this picture is accurate, about 30 minutes. https://www.acurapartswarehouse.com/parts-list/2003-acura-tl-4dr-tl-navi-ka5at/cylinder-block-oil-pan.html?PNC=8

Under the lower intake manifold.

For 1996 Acura TL 2.5L PFI 5cyl the Vehicle Speed Sensor - Location is located mounted on transmission.

Fig.: Exploded view of the vehicle speed sensor (click for zoom).

Hope this helps (remember to rate this answer).

Autozone and oreilly and basically all of the parts stores have free online specs and settings to look up.

On this website you find fuse box diagram and description for Acura TL (2001)

http://www.carknowledge.info/acura-tl-2001-wiring-diagrams-fuse-panel

remove the intake manifold ,remove radiator ,remove radiator intake and outake housing, remove fan ,remove all belts: power steering, alternator and if you have a/c, remove harmonic balancer ,remove timing belt covers, remove timing belt remove intake housinng once you have remove all the above, your freaken engine will look naked, you can see the location of the knock sensor is locate in the engine valley

9 times out of 10 it is a faulty sensor. if you have the 4 cylinder engine, v-tech? it will be located on the back of the block next to the oil filter. if you have the V6 it will be under the intake manifold.you can test the knock sensor with a dvm. set your mter on continuity, hook your leeds to the single pin conector and the side of the sensor, you should have a resistance reading.now lightly tap on the side of the sensor with a small screw driver. if the resistance changes the sensor is good