Anchor nuts need to be checked on a regular basis. That van was obviously not racked proprerly. If you look close at the bolt holes, you can see that no concrete was pulled either. Looks like it was possibly the right combo of loose bolts and poor judgement.
OTC scanners have never been up to par. They have led me down the wrong path too many times. There is nothing in the diagnostic charts that point to an APPS. More testing is needed.
One thing I forgot to mention. Dont know if you have access to TSB's for this vehicle, but there might be a reflash for this issue. Something i would definetly look into. Good luck, If you get fixed let us know what it was.
Study up on the code setting criteria for those codes. That should help point you in the right direction. If you dont have access to proper tools(scanner) & info for the vehicle than your gonna be chasing your tail or guessing and that can get expensive, let alone tic off your customer. I wont...