slacker

iTrader: (1)

Po325 = R bank knock sensor

so then swapped harness pins , as manual suggests , and sent code to L bank .
suggests computer is ok .

pulled apart the top end to expose the knock sensors ..
only 1 sensor is subject , as the code suggests , so I checked it with ohm meter (as per manual) .. specks OK as per manual .. (also checked both , and ok)

also did the harness Ohm check , and all ok ..

is this engine needing a rebuild ?



.

rworegon

slacker, the knock sensor wire is quite inexpensive from the dealer and likely the culprit even tho' it seems to check out ok. The sensors themselves rarely fail.

What's the history on this engine?

slacker

iTrader: (1)

147K kilometres .. that's kilometers not miles !
so its a real low mile engine !! which surprises the crap out of me that its knocking !!

I don't know the service history , as this is a "swap" engine , but the internals looked good .

I do have a new knock sensor and wire harness coming tomorrow , so I guess we'll see



.

rworegon

It could be a connection in the harness that is failing due to the harness being manipulated for the swap.

slacker

iTrader: (1)

that's doubtful , as the harness plug connection for the knock sensors is not molested or even used in this swap .
as posted above .. re-pinning the connection confirms this


but I do appreciate your response .. thinking is good !!


.

rworegon

Oops, I missed the re-pinning part. My bad! It's what I get for speed reading, haha.

slacker

iTrader: (1)

so just wanted to update this thread for future tech .

although the original wire and sensor "spec" out as "normal ". I decided to replace the knock sensor #1 (right bank) anyway, simply because of the wire swap I did , and the code moved to bank#2 ... this was not an easy decision , as for me , price was not nominal , and if it didn't work , it would have been a waste of money .

new sensor in the right bank , and also replaced the wire . and all back together and runs like a champ



.

vital22re

iTrader: (2)

most times ive come accross this, the harness is toast from the heat or due to corossion from coolant leak into the valley.

slacker

iTrader: (1)

I do agree with you , but in this instance , because of the " re pin " I did .. I absolutely think it was actually the sensor ..

and although the manual gave instruction to test .. the manual was wrong in this case


.

Tacoma owner 420

99 4 runner 4.3 code for bank 1 knock sensor did my research replaced both knock sensors and sub harness new timing belt and water pump new gaskets. Now I'm getting both knock sensor codes clear runs for 5 mins back on please help just tested 2 of the 3 wires from sub harness tone I they are fine with the fluke meter what is the other wire where does it go please help