Quote:
Originally Posted by Walt White Coupe
So this is what I've learned about the diagnostic saying that my O2 sensor after the cat converter has internal resistance that is too high. That aft sensor has no effect on engine fuel management or any other operating functions.
The O2 sensor before the cat converter is the important one for controlling those functions. Essentially the sensor after the cat converter is used to determine if your cat converter is functioning as designed. So, I'm in no hurry to replace it.
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This was super helpful to me:
https://us.autologic.com/news/fuel-t...-faults-part-2
Try data logging your fuel trim in real time after warm up. Depending on your scanning tool you should also be able to graph real time O2 Sensor data and compare them from each side, this is when it was plain as day to me.