That is good. However, I see you have bank 1 sensor 2, this is the downstream (after converter), and bank 2 sensor 1 (before the converter). We need to compare Bank 1 sensor 1 to Bank 2 sensor 1. Then each bank sensor 2 to each other.
You should see both these upstream sensors reading about the same and then bank 2 downstream sensor will be off from bank 1. This will indicate that the converter is not reducing the emissions.
The way this works is the upstream measures the air/fuel coming out of the motor. The downstream measures the air/fuel after the converter and it needs to see the oxygen content higher then prior in order for it to see that the converter is reducing the emissions.
As you can see the bank 1 sensor 2 is reading under.1 volts the whole time. This is good as.1 volts is high oxygen content. The closer you get to 1 volt the less oxygen there is in the exhaust which means there would be more fuel.
So again if the downstream sensor is reading high oxygen content then it assumes the converter is not doing its job. However, this could be due to a faulty sensor if it is reading incorrectly. If the upstream is reading too low or the downstream is reading too high then it will think the converter is not doing its job.
So just get both upstream voltages and downstreams and we can go from there. Thanks
Monday, January 25th, 2021 AT 6:48 PM