Who says that you need to replace your knock sensor. I have a 2000 Quest and I am also a mechanic. What is your mileage? Does your engine ping? What grade of fuel are you using? I would be glad to help if I can.

Hi,
I am new to this forum and I hope some one can help me also whith an issue that I have with my 2000 Nissan Quest GXE. I've had it since Oct 2003 when it had only 52K miles on it. Now it has about 113K miles.

Recently, I had my Radiator fan ON all the time while the car/engine is on. Intially, when the problem surfaced, I had a a 'plastic burning' smell inside my car. This caused my radiator fan to be on all the time, even after turning off the engine/car. It was on all night and drained my battery. Found a 'burnt' fan relay in the fuse box.

Had the computer scanned and the following code came up: P0325 which according to the computer, it is a 'knock sensor issue'. Now, a mechanic I know told me it would take about 5.2 hours of labor and about $190 for parts.

Does this make sense? I mean, the 'knock sensor issue' causing my fan relay to burn and the radiator fan to be on all the time.

Now he told me that the Radiator fan being on all the time is not a big issue, but that I should change the sensor.

What do you think?

NOTE: My engine does NOT ping. I've been using regular (87 Oc) gas all this time. And the 'check engine' light did NOT come on even when the problem first appeared about a week ago. The car is running good for the most part.

TIA
David.