Is there an O2 sensor that has wideband and narrowband readings all-in-one?
I wanted something like this to get a good air fuel ratio readout while keeping the stock ECU which uses narrowband.
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Maybe not the sensor itself, but there are controllers that can perform the conversion.
They are capable of simulating the narrowband signal using the wideband O2 reading and send it to the ECU, while maintaining a separate channel to preserve the actual wideband reading.
The enthusiast community shows a lot of love for the Innovate LC series (no affiliation), and a quick web search reveals many guides on how to perform this.
I don't know of one, that does not mean one does not exist. I would guess one to have 5 or so wires...
However, you may find it is quicker and easier to just fit a second sensor and use that for your application - any workshop should b able to drill and weld the boss to the pipe that you need.
Another possibility is there a different / later version of your car where the exhaust has two sensors and would that later part fit? Advantage is that it is easily sourced in the future...