Honda Knock sensor Testing Simple easy method. P0325 code reading

Simple easy knock sensor testing. If you detected a P0325 code reading on the OBD2 Scanner means that there is a malfunction within the knock sensor 1 in circuit bank 1. This malfunction will be detected by the ECU when it does not receive the proper information from the knock sensor. This triggers a Check Engine Light to be illuminated on the dashboard.
Tools needed
multimeter

[@williamday3521]

I was under the impression that there should be resistance. The fact that there wasn't is confirmation that your knock sensor is bad?

[@PalataoArmy]

There is no resistance for my brand new knock sensor, but it will produce voltage when knock using metal, and it makes voltage drop about 2.5V dc when supply 5V dc.

[@waverider5751]

@@PalataoArmyYou don’t supply voltage, it’s piezoelectric output comes from the imbedded crystal that has physical properties that create about .25 volts until the engine produces a knock that triggers the pressure on the crystal to produce small amounts of linear voltage from within the sensor. The stronger the knock, the higher the voltage spikes.

[@howtodoitdude1662]

So you had an engine code that you knock sensor was bad, but when you tested it, it showed that it was good, so your problem was not your knock sensor.

[@balaofcanada]

Even though it test OK, but it was throwing g the code as it's worn out.

[@waverider5751]

Yeah, once they throw a code, they’re toast.

[@خشمطويق454]

Thank you, great work

[@GirmishAmeneshewa]

It's good 👍

[@abrahamjw7]

test wrong, you should knock itself not tha table

[@balaofcanada]

I dont think so. These are very sensitive to vibration and knocking. Even in the car, nothing knocks the knock sensor. It just picks up the knocking from the engine block.

[@PalataoArmy]

​@@balaofcanadamost piezoelectric knock sensor pickup knocking frequency between 6-9khz, depends on the car manufacturer. So if the engine rattling is not in any those range, it will not give cel.

[@benjaminduliguez5420]

Two types..of sensor ..its single pin and twu pin..for instance two wires cut or eat the rat.. how to know to correct connection pin.

[@staceymortoncoto7960]

Knock sensor 2004 Honda pilot

[@alanrichardson9175]

After 400,000 K you changed it?

[@luisduque4506]

I think the sensor need to read resistance

[@PalataoArmy]

It depends, piezoelectric or resonance type of knock sensor. Most important, it produce certain frequency at certain rpm, check your manual and it should be not shorted.

[@jsmadray]

Tons of extra talking that just lengthens this video for no reason.

[@balaofcanada]

Yup.....I agree. 🙂

[@aarontapatio2257]

That thing looks like shit😂

[@balaofcanada]

That's right.....20 year old shit 😀

[@faridimadi7379]

too much talk

[@jf8322]

It’s the wire

[@balaofcanada]

Fortunately the wire is good

[@roadwraith6]

Well i ended up on this video because just swaped sensor but still faultcode.
Did this test on the old and new one. Can't get a voltage reading. But when I drive the car I can livestream date from knocksensor.
It's bouncing between 0,12-1volt
Can anyone without a check engine light on tell me what there sensor is giving? Would be really helpful

[@flynnpark3r]

did you figure it out? i have code p0325 even after replacing my knock sensor

[@DieZeL9]

Same here.Any updates ?

[@alanrichardson9175]

If you have a code? Put in a new sensor! WTF?