I'm trying to diagnose my catalytic converter, even though I don't have a check engine light on. The live data on my scan tool indicates that the voltage for my upstream 02 sensors fluctuate just as they are supposed to. However, my downstream O2 sensor (the one by the catalytic converter) remains flat at zero (0.000), which is highlighted in blue in the attached video. So what does that mean in regards to the catalytic converter?
I have also conducted a temperature test by using an infrared thermometer. My understanding is that the temperature of the outlet catalytic converter is supposed to be higher than the inlet temperature. In my case, the inlet temperature is higher than the outlet temperature. Hence, what does that tell us? Would that be a conclusive way of determining that the catalytic converter is faulty or would additional tests need to be carried out?
Also, if the braided part of a flex pipe has deteriorated, but the inside parts are still good and there is no exhaust leak coming from the flex pipe, is it necessary to replace the flex pipe?
Cheers!
Thank you!
I have also conducted a temperature test by using an infrared thermometer. My understanding is that the temperature of the outlet catalytic converter is supposed to be higher than the inlet temperature. In my case, the inlet temperature is higher than the outlet temperature. Hence, what does that tell us? Would that be a conclusive way of determining that the catalytic converter is faulty or would additional tests need to be carried out?
Also, if the braided part of a flex pipe has deteriorated, but the inside parts are still good and there is no exhaust leak coming from the flex pipe, is it necessary to replace the flex pipe?
Cheers!
Thank you!
Video (Click to enlarge)
Oct 28, 2020 at 10:22 PM
