Knock Sensor p0327, p0328 Check Engine Light

What scanner did you use to read the codes?

 

I've got 2 codes. one is 3000H/12288
the other one is P3009

does anyone know about these codes and how do I post a question? I just signed up but do not see where I should post a new question, thank you for explaining n detail how I should do that...

when trying to isolate the problem it only comes up when the engine is ON / ready and in Neutral Gear but does not come up if I just start the ignition (before cracking the engine, no codes)... so what seams to be the problem?

 

That will read obd codes but not hybrid codes.

If knock sensor engaged it means it's sensing a knock. We are seeing a lot of Prius lately with engine damage caused by high mileage poorly maintained oil levels. Many high mileage Prius eat oil and owners allowed to let oil go so low it damages main bearing or
piston bearing.
Engine bottom end is splashed lubricated. Low oil level no splash.
If yellow engine light lit because of low oil I can almost guarantee you it has
Been damaged.
When knock sensor engaged it pulls engine timing and engine will have no power.
Go on you tube look up Prius inspection mode
That puts the car in continuous engine run. With engine on get under front of car and listen to engine for knocking or vibration.

 

you can only if you wear eye protection and stay away from alcohol but kidding aside, its a good idea to invest in a toyota specific scan tool. some are expensive some not at all. I've seen a cable with a CD as low as $17 but you do need a laptop preferably with XP on it. That's what the pro's recommend. Then you can get an accurate reading of codes that relate to hybrid system. Good luck!

 

That's probably correct, but is this the case? Is your engine high mileage, with some oil-burning issues, and perhaps not perfectly maintained?

If you've been diligent about maintenance, maybe you do have a more complicated emissions or engine control issue, and a Mini-VCI and laptop will help diagnose it correctly.

 

keep the motor change the body..

 

Why have you change knok sensor...did you inspect ignition ..spark plug ...fuel delivery..injectors...timing marks before you have engaged to replace knok sensor
Another reason could be fuel quality...that will trigger knok sensor....
Don't just start changing things till you are definitely sure you have sensor issue....eliminate all causes that will trigger knok sensor first

 

I think your reasoning is okay. If the knock sensor is working and senses knocks, it doesn't give a code, it attempts to correct the knock with ignition timing, etc. I think the code is just to supervise the circuit, as you've deduced.

Is it hard replacing the sensor? It looks like it's under the intake manifold. Did you get an OEM sensor?

 

This is an example of why I HATE code readers and the technicians that use them to fix everything...

P0327 is a CIRCUIT code, essentially the input VOLTAGE is LOW

P0328 is also a CIRCUIT code, essentially the input VOLTAGE is HIGH

Engine knock codes are: P0301, 2, 3, 4, last digit is the cylinder number

Additionally, if you are getting pre-ignition/engine knock/misfires the check engine lamp should be FLASHING

 

I don't think Toyota engineers are that dumb to put splash lube on one of the most sophisticated cars that they designed. That's why there is a lower mark on the dip stick and a higher one. Keep within those marks you are good.

 

I better wait and put a fresh tank of detergent gas in before I replace it I suppose


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