Mike's RX300

Well. I finally got to the Knock Sensor cable by removing the air filter assy. Can you tell me what color wire goes to each sensor? I believe there is a brown and a black. The white wires are en't used unless they are grounds.

By the way, when I looked into the intake after removing the air filter assy, there is oil in the left side puddled. Have you seen this before?

Thanks,

Mike Garner

I can't begin to tell you the frustration and aggravation I have gone through to get the information you have provided. This problem has plagued me for a long time and I've already spent thousands getting the top end rebuilt due to sludge. I believe the mechanic left me a little present with the left bank knock sensor. I have decided, though to jumper the right bank to the left bank to the ecm. Hope it works. The other end of the wiring harness should be male to female and I also have been told to jumper the black wire to the white wire of the other plug. Does this sound correct?

Thanks again!

Mike Garner (RET Navy)

Jason,

The information you've provided is very helpful. I am begiinning to perform the same job but I have one problem, how do you remove the cowling the firewall?

Hello everyone,

I just spent the last week going crazy trying to fix a "knock sensor" code P0330 on my RX300. So to save the next guy a little aggravation here is what I found out.

The dealer was trying to charge an "arm and a leg" to fix this problem (parts & labor). :cries:

Parts you are going to need:

1. Knock sensor

2. Knock sensor wiring harness

3. Intake gaskets

4. By-pass hose

5. Antifreeze

Lexus quoted me a price of $198.00 per sensor. (The car has 2 sensors, if you're going to go through the trouble of changing them, change them both!)

After several hours of bothering the hell out of the parts guy at Lexus he told me that the part number for the knock sensor I needed was 896145-12040. I was able to order these from partsquick.com for $97.94 each. These are Genuine Toyota parts and were at my door in two days.

I ordered the intake gasket kit from rockauto.com for $56.79 this was a FEL-PRO part number MS92766 it came with all 3 gaskets.

I did order the wiring harness and by-pass hose from Lexus because I didn't have the energy to go through the whole mess again. They charged me $42.00 for the harness and $18.00 for the hose. When I got them I peeled back the Lexus sticker to reveal a Genuine Toyota sticker underneath! The Toyota part number for the wiring harness is 82219-07010 and the Toyota part number for the by-pass hose is 16261-20010. I'm sure with a little searching you can find this cheaper as well. Definitely order the by-pass hose because the hose is almost impossible to remove and I had to cut it off.

It took me 9 hours to change the knock sensors. It is not an easy job. You have to remove the whole top half of the engine.

I guess my best advice for anyone that's going to tackle this project is to get a small 1/4" ratchet with a swivel head. I used this to get to the intake bracket mount bolts (2), as well as the ground bolt and fuel line bracket bolt that are located behind the intake, there's not much room back there but this saved me tons of time.

Oh! and you might as well change the spark plugs cause they are breeze to change with half the engine missing.

Here are some pics of the whole ordeal. Hope this helps. Good Luck

Jason

knck sensor part number

wiring harness

by-pass hose

wiring harness part number

parts i had to remove!

engine with all parts out of the way

sensors and wiring harness with by-pass hose removed

I have the exact same problem and I would like to know where this harness is and is it accessible from the top of the motor? The left bank knock sensor is under the intake manifold and there is a wiring harness that comes out by the thermostat housing but I am not sure if I'm on the right track.

I have a 2000 RX300 with an OBD code of P1349. This is showing that I have potential problem with my oil control valve bank1. I need a part number. Please reply asap.

Thanks,

Mike