P0325 NISSAN - my 2000 pathfinder show this code,

Question

the engine starts going up and down rpm and it turns off ,so i've replaced the knock sensor and still the same, what could it be?
o btw i also change the spark plugs.. thank you.

Answer 1

I am not an expert but everytime I see that condition you describe I always found a faulty or adjustment need TPS sensor if the TPS reads correctly then check Engine Coolant Temp Sensor, if that condition you describe goes away after engine reashing normal temp then go directly to Engine Coolant Temp Sensor. Just my 2 cents