My car wasnt running well after 3000 RPM.
So,
In past few weeks, I replaced below parts, due to the Knock sensor code came on my car.

Replaced

- Knock sensor
- Gaskets
- MAF sensor

But, still got the knock sensor code on mine.

After few replacement, car runs better, but still strugglin after 4000 RPM, not running well.

What would I do with it.

Maybe spark plug is the problem??
Its not the throttle body problem.

My car is 2003, 75000miles on it.

 

Is the code for bad knock sensor or for excessive knock?

 

The code that I have right now?
Its just knock sensor.

Today, just reset for everything on my car at the dealershop.
But, the dealershop told me that I still have the knock sensor error code.

 

anyone suggestion for the limp mode?

I had searched this for a week, basically most of solution was
throttle body or knock sensor, and MAF sensor, but it didnt helped me.

 

I had the same problem but did you happen to replace the KS harness when you replaced the KS cause if you don't replace both at the same time you just wasted a lot of time..

 

I took it to the shop to replaced knock sensor, they told me that they also checked harness, and it woks fine... hummmm...

what should I do with it.

 

I wish I had taken pics of my harness cause that thing was toast but to be honest I wouldn't trust the shop on that one.. I had to take apart the harness to find the problem but my 03 has about 187xxx so that was expected but I would just replace it granted I installed a xyz pipe and MD spacer at the same time but my car ran awesome after I replaced the KS and harness.. if you go to Nissan its only 80 bucks for the part but tell them to look for a fuel injector harness or else they wont find it or come up with some bull about how you have to buy 800 dollars worth of stuff.. but its worth it in my opinion

 

I am turely appriciate your reply.
Ill just gonna follow whatever you said, so the wire that i need to buy is
"fuel injector harness" ??
How did you replaced harness tho..

 

It comes with the fuel injector harness its attached to it by electrical tape you can install both or Just use the KS harness... you have to remove the upper and lower Plenum and lower collector to get to it its not that hard I'm fairly good with cars but no pro and I did it myself.. there's a thread floating around somewhere that has pics and pointers on it I'd look it up but I'm on my phone but I hope you get it fixed I didn't even know my car was running like crap til I fixed it and it was a night and day difference.

 

Thank you for your advise.

I just remember that they didnt said that "we replaced wire..."
They only said that chekced wire and it worked.

Ill go dealershop tomorrow and ask for the wire.

I probably sholud be able to do replaced wire.
Ill post it after I replaced wire.

thanks again.

 

does this could be bad motor oil?

 

Nope.

 

you have to replace the harness as well. I had the same exact problem. Replaced only the knock sensor and that didnt do ****. Replaced the harness and that solved the problem.

 

Do you hav pics that when you replaced knock sensor and harness?

harness shouldn't be hard, right?

Basically, open the upper and lower planum, then ill see the knock sensor.

right?