[s-cars] Fault code help!

[* FAIRCHANCE PHCY]

Hello collective S minds,
Just finished head gasket/timing belt. Previously no check 
engine. Fire up and check engine light. I get one or both 
of these codes. 00523 intake temp sensor, open or short to 
B+.
00533 idle regulation adaptation limit exceeded.09-00 
adaptation limit surpassed. Clear codes, start engine runs 
fine for 30 seconds, then engine light and idle jumps to 
1100 rpm. The car runs well otherwise. Took out sensor 
inspected and cleaned, also cleaned ISV. Any ideas?
thanks,
Dave