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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

EVAP readiness monitor issue

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Old Oct 1, 2024 | 9:32 PM
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Default EVAP also won't ready but all emission went crazy

Originally Posted by tech2
evap monitor won't run if the fuel level is below 1/4 or above 3/4.
Thanks for the info about the fuel level. It was driving me crazy that the EVAP wouldn't ready. Ready on the way home, all emissions were okay except the EVAP.
I decided to call it quits for the night. After finishing five drive cycles and on the way home all the other emissions went back to not ready or incomplete status.
I feel like I'm worse off than when I began the drive cycles tonight. Anyone experience this?
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