2011 Buick Lacrosse CX 2 4 stalling after engine replacement 

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Stalling after engine replacement
Codes in the computer are P0140 P0089 P0520
P0089 code is Fuel Pressure Regulator Performance
P0520 Engine Oil Pressure Sensor Circuit Malfunction
P0140 Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity
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