OBD1-code 52 for 1995 toyota 4runner help

50

Asked by Jul 08, 2014 at 12:12 PM about the 1995 Toyota 4Runner 4 Dr SR5 V6 4WD SUV

Question type: Maintenance & Repair

I just recently found out that my 4runner
wich is a v6 4x4 3.0engine has a trouble
code which is the 52 for the knock sensor
signal does anyone knows about this, I did
a head gasket replacement, rebuild both
heads, replaced the knock sensor wire but
didnt replace the the knock sensor, it been
2years since I did all this work and its been
almost a month that this code came up
turns on the check engine light after couple
minutes of driving the truck, and it losses
power, hesitate to accelerate on a stop or
red light its frustrating please help any
secure or promising suggestions or ideas I
would really appreciate it thanks

10 Answers

92,785

Most likely the knock sensor went bad, I usually replace them when I pull a head for any kind of head work also when I do a freeze plug replacement job.

2 of 2 people found this helpful.
50

Thats what I was thinking that the knock sesor fried,do you know anything about drilling the block of the engine to put the knock sensor on the outside and not take everything apart and run the wire where the new spot and knock sensor will go. what do you mean by feeze plug replacement job?

1 of 1 people found this helpful.
92,785

The block should already be knock sensor ready, there maybe a bolt in it to keep the crud out. Freeze plugs are the small metal pugs that are in the block and heads that eventually go bad and start leaking.

1 of 1 people found this helpful.
3,065

Knock sensor is under manifold intake two intake. Gskt sealant Toyota make a great sealant 00295-00102 black sealant really good product.i put all my motors togeather with it. Also replace wire 82219-35010 wire not to bad of a job 2 hrs maybe.do it yourself it's easy.

1 of 1 people found this helpful.
3,065

Ck the wire the sensor don't go bad very often I worked for toyota 23 years on. Shop parts counter.problem most of time wire.

4 of 4 people found this helpful.
40

i have same issue changed wire and sensor still code 52 also changed timing, spark plugs, wires, cap, rotor, radiator, fuel injectors, ecu, egr. only thing i have left to try is engine wiring harness and going to start that tomorrow unless anyone else has any input please call any time i am frustrated and broke Marc 401-450-6698

4 of 4 people found this helpful.

Marc I have the same problem did you find a solution

10

I have the same problem and I lost power

1 of 1 people found this helpful.

I am having rhe same problem code 52 knock sensor purchaced a new one. When i atart the truck it runs fine for like 30 min then check engine light pops up and start to get a bit boggy fuel economy suffers a bit. And idles rougher thwn usual. Mechanic told me it soumds like my motor is running of 5 cylinders. Which qould explain konda why the truck runs fine then the code 52 comes up im leaning toward the ignition system spark plugs alternator fuel injectors ectany input ?

92,785

Try unscrewing the knock sensor from the block and wire it up out of the way so it just hangs in the air, clear the code and drive it, if the code comes back then something is wrong in either the engine management wiring or the computer has a programming glitch, if it doesn't come back then it is picking up something inside the engine that is causing the computer to read it as a ping, I have seen over advanced base timing cause this,, so make sure it is set right. HTH

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