Mercury Marquis P Codes (Powertrain) P0100 - P0199

Could Not Smog Car Because P0174 Code. Took It To A Mechanic (ford Doctor). He Replaced The Intake Manifold. ( I Know The Story) Gorman Made...

Replaced O2 Sensor Bank 1, #2. Reset. After 100 Mile Drive And 2-3 On Cycles Problem Came Back. Reset Again And Problem Comes Back. Checked...