Comments by "YSongCloud" (@YSongCloud) on "Check Engine Light. Customer States nothing else. Never know what you're going to find." video.

  1. Because the codes are already history codes. Without clearing them, they would still be there. Basic Auto Tech 101, always clear codes after a repair and drive the vehicle at normal operating temperature until all systems register in a ready state. Anything still having issues will pop a new code. No code = problem resolved.
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