Knock sensor

[gto-69]

I have replaced my knock sensor at 29500 miles and now again at 46,000 miles. Both times it was in fail-safe mode with P0328 code. These were only 2 years and 6 months apart. I always use premium fuel. It is about $450 each time. What's going on? Am I to expect this again? Anything I can do to prevent it or should I sell the truck? My mechanic does not believe in the relocation fix. Does Nissan acknowledge or suggest a fix?
Thanks

[Madmax3]

If I were your mechanic I would not believe in the relocation fix either. If it were relocated I could only charge $150 to change it out and I have a boat payment due so I am not a believer either.

[gto-69]

I believe that my mechanic is a very close friend who does this job to save me money over what a dealer would charge. (twice as much) In the past he has worked on all my vehicles(5) and is the only mechanic I'll use. I am confident as he is that the knock sensor is where it is, for a reason. Moving it could send false readings to the ecu which in turn could cause numerous other problems. My local dealership says the knock sensors are not a typical problem on these trucks, but I read otherwise everywhere on the web. I was just asking if anyone knows of a Nissan approved fix.
Thanks

[Madmax3]

So then just keep replacing it when it goes out and pay the $450.

[Louis138]

I am a professional mechanic and have personally relocated the knock sensor on my own '99 Frontier to an intake manifold bolt. It works fine and has caused no problems at all since I did it about a year (10,000 mi) ago. It still sends a good signal from the new location. As far as the dealership goes, they are 'fibbing' to you. It is a known problem, but they don't have to fix it for free. Get the sensor and harness for about $180 total, relocate it, and you won't have to worry about it for a long time. The new location is less harsh on the sensor. Even if you do have to replace it sometime in the future, it will take less than 5 minutes at the new location.