The 2000 Tundra I purchased has the P0125 code.

I have replaced both upstream O2 sensors with new Denso sensors. Still have the code after clearing.

Replaced the Coolant Temp Sensor for the computer.

I checked the wiring the other day and have voltage on the B+ of the heater circuits of both sensors.

I pulled the plug on the computer and checked the wire between the sensor and the computer plug on both sensors heater circuit.
Both had continuity. Showed 0 ohms on the meter.

I'm at a loss on where to go from here. Could the problem be in the computer itself?

The truck runs great and there are no other trouble codes on the truck.

Thanks in advance for any help you can send my way.