Q: Check engine light is on and obdII said O2 sensor. 2002 Chevy Silverado 1500

嗨 - 有些问题代码需要一定数量的“驱动周期”，然后再关闭检查引擎问题代码，O2 sensors often being one of them. If your truck is running well, ignore the light for a few days, and make sure to drive it to a thoroughly hot condition if at all possible each time. This ensures that engine management is going into "closed loop" mode, where the O2 sensor is an active participant in the fuel mixture process. If the problem continues, I would recommend an发动机排放系统检查by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.