I'm working on a 97 4.0 that was abandoned for 4 years. Did tune-up stuff: plugs, wires, filters, fluid flush...also replaced coolant temp sensor, thermostat, sending unit to fix a nonfunctional temp guage. Replaced EGR, hoses, and dpfe unit because they looked very clogged and dirty. I also replaced the bank 2 oxygen sensor, but have not yet replaced the two bank 1 sensors. I'm not sure if that's going to fix my problem. I'm still getting the following 5 obd2 codes:

P1152(Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 2)
P1132(Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 1)
P0135(Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0155(Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
P0141(O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2)

Please help!!!