fireguyfire

Hi Gents;
I keep getting the same 3 codes thrown on my 2010 3500 cummins:
P0036 HO2S heater control circuit bank 1
P0471 Exhaust pressure sensor performance
P0191 Fuel rail pressure sensor.

I pulled and cleaned the exhaust pressure sensor a year or so ago as recommended on youtube.

I am wanting to trouble shoot and rectify these codes if I can myself; can anyone tell me are these 3 codes related, or independent of each other?
I would love some advice on trouble shooting these codes if someone would be generous enough to share their knowledge before I go taking it into the shop and shelling out the bucks while they guess and throw parts at it.
Thanks in advance for any help!

HOHN

The P0036 is essentially an O2 sensor code (these sensors are heated).

Given that all these codes are for sensors, I would be tracing the wire harness to see if there is a harness issue-- loose connector or bad ground.