As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO DUCT PRESSURE WITH APU RUNNING AND BLEED OPEN. TRIED RE-SETTING CB'S -NO HELP. SCV, ECU AND FLOW SENSING MODULE REPLACED 06 DEC 11. REPLACED APU INLET PRESSURE (P2) SENSOR PER MM. RAN APU AND DUCT PRESSURE READS 35 PSI, MOTORED NR 2 ENGINE AND APU DUCT PRESSURE READS NORMAL.