p1152

I have a 98 Ford Explorer Eddie Bauer Edition with a 4.0 SOHC motor in it and i just replace the motor and now all of a sudden i am coming up with three different codes p1131, p1132, p1152 I have cleaned the MAF and replaced the tps what could this be can anyone help me i have tried just about...

Help needed :) My 96' Explorer runs rough up to about 500rpm. Checked the car with my OBDii code reader, and got 3 codes: P0402 - EGR flow malfunction P1151 - O2 upstream sensor ind. lean P1152 - O2 upstream sensor ind rich Can the reason for my rough engine be caused by the Oxygen...