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Delete code see if it comes back. On very hot days it may not come back as SAI won't run at certain temp/conditions.
If it comes back start with the easy ones...
Have car in cooler place...garage etc and start car with engine lid open. Put your had on SAI pump and you should feel/hear it run...you can't miss it if it runs...
If it runs, check the 1inch diameter hose that runs from SAI into the engine. That hose sometimes rubs on the intake runner over the years and can form a small hole leading to a leak.
If those are all good, take serp belt off and take alternator out(2 bolts and very easy to remove). You'll have access to the SAI "system" and can visually check the SAI component hoses...
It could be one of the 4-5 vacuum hoses...or elec valve or mech. valve.
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