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Check Engine Light, but no CODES...

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1.4K views 0 replies 1 participant last post by  SoCal Classic  
#1 ·
So after replacing both O2 sensors two weeks ago, my "check engine" light is still coming on 10 - 15 mins after start-up. The funny thing about it is that the display under the passenger seat is black, no codes are lit up. I know the display works, just got codes coming up for the O2 senors, hence the replacement.

Any thoughts??? Could the timing being not set correctly cause this? Or maybe a vacuum leak?