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PO 410 Trouble code 900

Hi All, I fixed the problem with the flashing arrow and blinking lights, PNP switch needed adjusting. Now I hope that takes care of it. I started the car yesterday and the check engine light came on, I read the code and erased. This morning it came back on and it is the same code PO 410 secondary air injection malfunction. Has anyone had luck in determining the cause of this. I checked to see if the pump was working, it was and does not stay on long. Is there a relay that may be delaying the response so that the light comes on? The car has 161,752 miles on it. Any help woul be greatly appreciated. Sped.






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