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would sputter, Bog out trying to drive and rough Idle. Could not go over 25 MPH. Read Codes P0405 Changed EGR Valve, Egr Pressure Feedback Sensor , EGR Valve Control Sensor, Then it Coded P2195 O2 Sensor Stuck Lean Bank1 Position 1, Changed that. Still Runs like Garbage at high RPMs, can not rev past 2000 RPMs. Ign Coils all test within Parameters, Cat Temps well within Range. Fuel Pressure Good. MAF Good. Had Shop test all sensors with computer & they said all showed Good. I'm at a Loss here &They can't figure it out.

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Vehicle: 03 Explorer 4.6

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P0405 Exhaust gas recirculation sensor circuit A low

P2195  Oxygen sensor signal lean

If you have a way of testing for back pressure that should be done, one way is remove the upstream 02 sensor , leave connected and secured , and test rive if performance improves you have excessive back pressure

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