How to judge the fault by observing the color of the top of the oxygen sensor？
Date: 2021-05-23 Clicks: 1295
① Light gray: This is the normal color of the oxygen sensor;
② White tip: it is caused by silicon pollution. At this time, the oxygen sensor must be replaced;
③ Brown top: it is caused by lead pollution. If it is serious, the oxygen sensor must be replaced;
④ Black tip: it is caused by carbon deposition. After removing carbon deposition fault of engine, it can automatically remove carbon deposition on oxygen sensor.