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Hello I have a 2010 Chevy impala LT with the most common trouble issue code P0411 the trouble code on scanner says “ air injection pump incorrect flow” I have changed the pump replaced the valve in the past and replaced the relay and I keep getting this stupid code back. It doesn’t effect proformance at all . I notice when I clear it and I drive for hours miles it doesn’t come back until I shut it off and start it up again any suggestions to fix this issue ? I don’t want to knee throwing money at it and I keep getting code back thank you
 
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