Le borraron el codigo del knock sensor 1 a mi camioneta para que pase el smog test. Tengo que cambiarselo? aunque ya no sale el codigo? La puedo manejar sin problema? Gracias

What is your question?

I took my Nissan frontier 2001 for a smog check, and the diagnostic was to replace the knock sensor 1, someone erased the code, so it would pass the smog test. Do I still have to change it? The engine light never came on, I only found out because I took my truck for the smog check. I also took my truck to AutoZone just to be sure, they run the test and the same thing came on, knock sensor 1 needs to be replaced. My concern is, after they erased the code, do I still need to replace the knock sensor 1? can I drive it safely? My truck is leaking tiny bits of oil from the cap, I changed the seal it didn't work, I changed the entire piece, it stills leaks, this has been going on for like 2 years. I also noted that is consuming more coolant than usual, this has been going on for the last month. Thanks.

How long has your 2001 Nissan Frontier had this problem?

I don't know. I only found out because I took it for a smog test. No check engine light came on.