What was found
DESCENDING THROUGH FL230 IN CLEAR CONDITIONS,NO ANTI ICE ON, WE GOT MASTER CAUTION FOR ANTI-ICE.THE "ENG ANTI-ICE" LIGHT WAS ON FOR ENG #2 LIGHT IS STILL ON AFTER LANDING AND TAXI IN. QRH WAS COMPLETED, AVOIDED ICING CONDITIONS. GROUNDED - YES. MAINT MESSAGE 36-11021 (HPSOV IS NOT IN COMMANDED POSITION). HPSOV GROUND TEST ACCOMPLISHED PER B737-9 AMM 36-11-00-810-803. MAINT MSG AND ENG ANTI-ICE MESSAGE CLEARED. ENG IDLE RUN COMPLETED, NO FAULTS NOTED. NO PREVIOUS HISTORY.