92 Self test threw 536 code while engine was off

[cliffjumper87]

So I ran both the engine on and off self tests this morning and got 111 and 536 with the engine off, and 111 with the engine on. Far as I know, the 111 codes mean it's good, but everything I can find about 536 is for when the engine is running. Any ideas?

 

[franklin2]

Isn't that some sort of air conditioner code?