As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENG ANTI ICE INDICATING ON WHEN IT IS NOT DIM BLUE LIGHT ON WITH SWITCH IN OFF POSITION TAI SHOWS OFF, CAME ON AFTER LANDING. GROUNDED - YES. PERFORMED B737-800 FIM 30-11 TASK 803, DURING OPERATIONAL CHECK FOUND PRSOV NO SUPPLYING AIR PRESSURES TO ENGINE #2 WING ANTI ICE. R&R ENG #2 PRSOV REF B737-800 AMM 36-11-04, PRSOV OPS CHECK GOOD, ENG #2 ANTI ICE OPS CHECK NORMAL.