I have this SES light, comes up, reset pcm, goes away for a week or 2, comes back... Before, i was told i was getting random cyl missfire in 2,5,7 so i replaced all my plugs and wires, at this time i was getting some stutter on accel from a stop. The stutter went away, light came back after 2 weeks.
Sometimes its there when power is on and goes away on ignition. No clue whats causing it.... Also now the car is running awesome but still get the light every 2weeks or so.
Mods are listed below. Also have 02 sims for the rear if thats any help.
__________________ 2000 Arctic White Camaro Z28-Forged 346ci, Built A4
2015 Black Camaro SS/RS- Stupid warranty....
2007 Imperial Blue Metallic NBS Silverado 1500 LT CCSB 5.3-Intake and straight pipes
...so i tried replacing the air tube with a cold air intake and i think the extra power blew out the cylinder heads and they crashed through valley pan into the crank. -Transmission Perform
first simple thing to check is for a leak in your PCV system. i had a very similar thing. would go away for 200...300 miles, then boom come back.
turns out i had a tare in the small rubber hose that connects to the lower passenger side of the intake manifold snout. had my LTFT all messed up and would trip the SES every once in a while.
follow the hose from the top of the TB to the valve cover, then from the snout of the intake manifold back to the Y in the back of the motor, there is soft rubber stuff back there too. then one side of the Y goes to the passenger side valve cover, one to the drivers rear.