01 ram 5.2 throwing P0031 and P0037 CEL was going on and off for a few days now it’s been consistently on the past few days. Is it likely both sensors would be bad? Thanks

 

Unlikely, the codes are actually for the heater circuit so it could be an issue with the heater supply voltage. Check the dark green/white wire at the oxygen sensor *connector* for 12V and while you're down there check the resistance across the heater to the brown/white wire. Should be very low sub 20 Ohms. Note that the wires from the connector to the actual sensor have different colors so look up at the connector.