oxygen sensor knock sensor
 

code for oxygen sensor and knock sensor came on at the same time. any t houghts will fuel injector cleaner help. mechanic says 02 sensor can cause false knock sensor code.

Same thing happened to my '95 Maxima. Mechanic said to leave it alone. Now, my car idles very rough and can not find idle adjustment.

I did the same to my maxima, took it to mechanic and it work well afterward.