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If the pump is indeed running and there is airflow then the problem is probably in the SAS valve. If it is detected that the valve cannot close you will get the MIL light.
I have been round and round with the p0410 code. Only my pump was full of water and wouldn't run. I replaced the pump with something different and everything has been good. I did get the p0410 code a couple weeks ago and sprayed a bunch of wd40 in the sas valve and haven't had the problem since. I suspect that I may need to replace the valve in the future.
Anyway, my point is to try spraying something into the sas valve and reseting the light and see what happens.
Good Luck
Doug
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