P0155? what is that?

You made the classic DIY mistake--replacing whatever part is listed in the trouble code without doing any diagnostic work. P0155 relates the o2 sensor HEATER circuit. That can be caused by an open wire or a blown fuse. Until you fix that, the oxygen sensors won't work properly and that can cause a P0432. First fix the P0155 issue

Then fix the P0455 Evaporative Emission Control System Leak Detected (gross leak) issue. THEN see if the P0432 goes away.

P0155 O2 Sensor Heater Circuit Malfunction (B2S1)
bank 2 ...side one

either the 02 sensor has failed or getting too much voltage

go with replace 02 sensor first

P0155 is not telling you which part is defective, it is saying there is a problem in the system and that the triggers the fault code. In this case you have a O2 sensor whose heater is not heating. This may be the senor or the wiring to it.
P0155 OBD-II Trouble Code: 02 Sensor Heater Circuit Malfunction in cylinder Bank 2 (V6 only), Sensor 1, this is the sensor before the catalyst.

P0155: O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0301: Cylinder 1 Misfire Detected
P0401: Exhaust Gas Recirculation Flow Insufficient Detected

P0155 CHEVROLET - HO2S Heater Performance Bank 2 Sensor 1

Replace the cylinder back sensor.

code p0155 is O2 sensor heater circuit
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CODE P0155 IS O2 HEATER FAULT MOST LIKELY CAUSE IS WIRING, GROUND CONNECTIONS ,POSSIBLE ECM .

P0155-02 sensor 2/1 heater failure. When monitored with battery voltage great than 10.5 volts at cold start ECT lessthank 14.7F battery temperature sensor equal to or less than 27F and engine idle for at least 12 seconds.Thanks

P0155 - Heated Oxygen Sensor Heater Circuit (bank 2, sensor 1)

bank 2 sensor 1 (front, driver side) o2 sensor needs to be replaced