I have a 04 f150 with the 5.4 and the previous owner has cut the cats out and it’s throwing the code p2196 in there a simulator, tune, or anything to fix that without reinstalling new cats.

 

Welcome to the forum. I do not know the answer, but I am sure someone will have an answer for you.

 

Welcome........................it would seem the issue is before the cats,...............that aren't there.

.Ford F150 P2196: Definition, Symptoms, Causes + DiagnosisMay 6, 2021 by JasonP2196 is a generic diagnostic trouble code that indicates that your Ford F150’s first oxygen sensor on bank one is stuck rich. It does not necessarily mean that the vehicle itself is running too rich. This code is the opposite of code P2195, which indicates the oxygen sensor is stuck lean.

P2196 Definition: Oxygen Sensor – Stuck Rich (Bank 1, Sensor 1)

Oxygen Sensor

When you get P2196 it means that the voltage level being recorded by the oxygen sensor is stuck on the rich side (think like a high waveform). Your engine’s computer uses the data from the oxygen sensor to adjust the air-fuel mixture for optimal combustion. There’s information on how to test and determine if your F150’s oxygen sensor is bad in the diagnostic section below.

Stuck Rich

A rich condition means that there’s too much fuel in relation to air entering into the combustion chamber. When your oxygen sensor is “stuck rich” the data value that it is sending to the PCM is consistently measuring too high.
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