code58

Since you're driving an ES300 and this is an RX forum I doubt that the fuse boxes would be the same. Which fuse (relay) box are you checking? I know the RX has a fuse box inside as well as a fuse and relay box under the hood. IF there is an A/F relay, see if there is a matching relay that it will run without and switch them. If you know how to check a relay, take it out and use jumper wires to see if it operates. Relays are notoriously dependable. I would say many cars go to the wreckeing yard with all the original relays in them. I have an RX electrical schematic but am almost certain it would be different than an ES.

By the way, what brand of sensors did you use?

RobUniv

I bought denso 234-9021 Oxygen Sensor (Air and Fuel Ratio Sensor) from amazon. I haven't checked the fuses under the dash yet. Need to check those. There is no A/F relay under the hood that I can see. Just an A/F fuse 25A. There is a HTR relay next to it. Not sure if that is what im supposed to check??? But ima check under the dash and see what I find. I'll report back. Also I remember hearing a pop sound after I started my car one day and the radio shut off but it immediately turned back on and Its never done it again. This is right about the time the cel light came on 5 months ago.