What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO LAX. CLIMBING THRU FL200 ENGINE 2 BLEED FAULT ON ECAM DISPLAYED. WHILE FLIGHT CREW WAS PERFORMING THE ECAM PROCEDURE THEY LOST CABIN PRESSURIZATION. SINCE THE #1 ENGINE BLEED WAS PLACARDED AS INOPERATIVE THE AIRCRAFT RETURNED TO LAX WHERE IT LANDED SAFLEY WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE #2 BLEED MANAGEMENT COMPUTER (AALA202307141203) AND THE #2 PYLON BLEED AIR OVERHEAT SENSING ELEMENT 1HF2. (AALA202307149385). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO BLEED MESSAGES OR CABIN PRESSURIZATION ISSUES.