As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG ANTI ICE AMBER LIGHT ILLUMIATED. GROUNDED - YES. FOUND MAINTENCE MESSAGE 36-21010. #1 ENG INTERMEDIATE DUCT PRESSURE SENSOR SIGNAL IS OUT OF RANGE. REMOVED AND REPLACED THE INTERMEDIATE MANIFOLD (PI) SENSOR. OPS CHECK AND LEAK CHECK GOOD. GROUND VERIFICATION PASSED WITH #1 ENG RUN, OPERATED #1 ENG ANTI ICE WITH NO DEFECTS NOTED. REF 737-9 AMM 36-11-05.