[Ozias]

I had the timing belt changed on my 2002 Nissan Frontier SC last week as preventive maintenance (100,000 kms). Ever since then, the "Service Engine Soon" light has been on solid. The dealer says that it is the knock sensor that needs to be replaced.

I know nothing about vehicles, but this seems very coincidental - everything was fine until I had the timing belt replace and the minute that is done another part goes? I suppose it could happen, but any insight into if changing the timing belt could cause an issue with the knock sensor would be appreciated or is this truely coincidence? Thanks.

 

[Ozias]

The timing belt cost me $700, the knock sensor $900.

The light continues to be on. They now are saying it is the O2 sensor(s). They have changed one of these sensors, they tell me there is 4 and that they may all need changed. Apparently, I am told by the dealer, that when the knock sensor goes, the O2 sensors over compensate and are commonly damaged which is likely what happened to me. They can't tell me if all 4 sensors are gone, but rather, replace one at a time and see if the light goes out?

Again, I know NOTHING about vehicles. The truck is running well, in fact, I believe it is running better. The pickup seems improved since the knock sensor was replaced, but I have no actual proof of that other than the way the truck "feels".

I know I am getting hosed. I don't know of any parts stores in Canada that will scan.....