cursed with code 52!
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cursed with code 52!
code 52 knock sensor. i have searched this and tryed everything suggested , checked wiring from sensor to ecm for resistance. got new pig tail and sensor, added ground wires to block and body even tryed to relocate the sensor as a test. couple seconds of driving, code is back. i have heard a vacumm leak or leaks could cause this code even though it doesn't match the code discription. i did not have this code until after i had to swap out the throttle body. i have resealed the throttle body and am sure there is no un metered air entering there. and just did the gaskets on the intake and plenum, and valve covers. new pcv. i have another ecm that i tryed, but same same. any more ideas would help. i am at my wits end.
Last edited by rtbatchelder; 01-16-2010 at 06:33 PM.
#2
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I assume 3.0 v6, the wiring sub harness under intake from sensor to connection at firewall needs to checked. It sucks I know, but maybe the wiring is frayed and you only have a couple of strands connected inside wiring jacketfrom being pulled on or moved. You will still have good resistance and/or voltage, but no opens or short to ground. Is the knock a Toyota part? Maybe it needs to be OEM sensor. The ECM ground needs to be on the cam cap bolt on the passenger head, not to the firewall or intake. That's all I got.
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I assume 3.0 v6, the wiring sub harness under intake from sensor to connection at firewall needs to checked. It sucks I know, but maybe the wiring is frayed and you only have a couple of strands connected inside wiring jacket from being pulled on or moved. You will still have good resistance and/or voltage, but no opens or short to ground. Is the knock a Toyota part? Maybe it needs to be OEM sensor. The ECM ground needs to be on the cam cap bolt on the passenger head, not to the firewall or intake. That's all I got.
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THANKS (Thelast83inNJ) for your help, i tryed a few things today, but what made my code 52 stay gone was, i un plugged the short pigtail to my new, relocated (temp. relocated) knock sensor and just used a jumper wire made of fuseable link wire, in between the sensor and the 4runner's wire harness connection. as a test and gave it a 5 mile test drive, no code 52. now i wonder, why the new wire and sensor didnt fix the problem. but with in the next weekend or so, i will properly install the sensor and make a new wire to the ecu. wierd. thanks again
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Rite on. Im having the same problem with my 1990 pickup. Did you try running the resistor on the knock sensor installed in the motor. And also what kind of resistor did you use. Im trying to get the damn thing smogged but this code 52 is killing me
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no resistor, just reached under the intake, but my knock sensor wire was on the passenger side so it was hard, using 2 picks, i un hooked the the clasp on the connector. drilled a hole in the lifting hook mounted a new knock sensor to that. plugged in the new pigtail. but still got the 52!!!!! well after i got real mad i went out and removed the pig tail and used my jumper wire made of fueable link and gator clipped it in place, real temp. for a test. and so help me that did the trick. now i need to figure out why the new pig tail is not working. but for now no 52
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I used a jumper wire after reading this and it worked,I relocated my knock sensor and wire to my engine lift hook it work great for three days then code 52 again.the jumper wire ideal works my pig tail part of the harness was bad.
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52 problem
My 93 3vze has had the 52 code ever since I bought it in Aug, 09, I checked the pig tail and the wire was not even hooked up to the ecm, I can see no trace of where the wire is supposed to go. I'm assuming that someone had the code and tried to bypass the knock sensor, I would like to try to bypass the sensor some how, can someone tell me if that is possible and what is the easiest way to do this. Thanks
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My 93 3vze has had the 52 code ever since I bought it in Aug, 09, I checked the pig tail and the wire was not even hooked up to the ecm, I can see no trace of where the wire is supposed to go. I'm assuming that someone had the code and tried to bypass the knock sensor, I would like to try to bypass the sensor some how, can someone tell me if that is possible and what is the easiest way to do this. Thanks
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Code 52 is back again I have allmost given up I do not want to tear the intake off.anyone want a parts truck lol, way to many kms on this truck, so a bad knock sensor there realy is a way to kill a toyota. the truck was fine till code 52 I was still getting 450kms to a tank of gas with 437,000kms on this truck.
#15
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rtbatchelder...do you have any pictures of your fix that you did? I just had to rebuild the top end of my 3.0 and about 3 days after i finished, i got a code 52. Im experiencing NO POWER LOSS, but it is very very annoying having to look at that light. I have NO want or drive to get under the intake manifold and mess with it. Really needing some help here bud, thanks
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