hello all, I have a 2007 nissan maxima 150,000milage on it and I am having a random misfire with no codes I had my car checked by my ultra loyal mechanic and he scanned it in with his bigger scan tool and also did a live data the car is running perfectly fine trough the data. But I run my mode 6 on my blue driver scan tool and every thing seems to be perfectly fine with the car except it has 1 fail for the: lean to rich sensor threshold voltage (constant) failed. I have a slight noise in cold start when the engine be warming up it makes a rattling noise for about 15 seconds from the exhaust under then it stop it only happens when the weather is chilly around 50’s, I’m just wondering if any of you guys know what is they an to rich sensor threshold voltage? https://youtube.com/shorts/xMMGLSaYJw4?feature=share