Vitz Catalytic Converter efficiency

riztauras (riztauras) 2020-06-29 19:27:40 +0500 #1

Hi All, so I tested the efficiency of my catalytic Converter using Toyota ELMScan app on my Vitz 2005

Above are the results. It was done after the engine was already at operating temperature after a round of 3-4 kilometres doing home grocery.
Is it even possible that a 15 year old catalytic Converter is still functioning and doing what it is supposed to do.
@Xulfiqar bhai I read that for good catalytic converter the criteria is the greater the average difference b/w O2S1 and O2S2 the better
The O2S2 is stable and maintaining its smooth offset difference b/w O2s1 and O2s2 even at higher rpm.
Can you or any expert on the subject please let me know if I am right in my assumption that this catalytic Converter is still good?

FaatehRehman (FaatehRehman) 2020-06-29 20:06:39 +0500 #2

Vitz 2005 First Gen?

syncview (syncview) 2020-06-29 21:12:36 +0500 #3

o2s b1 seems.to be a bit lazy and needs replacement.
otherwise all seems to be good

riztauras (riztauras) 2020-06-29 21:22:20 +0500 #4

2nd generation

riztauras (riztauras) 2020-06-29 21:22:59 +0500 #5

You mean O2S1?

syncview (syncview) 2020-06-30 00:32:46 +0500 #6

yep

umair149 (umair149) 2020-06-30 00:54:12 +0500 #7

Looks ok.
Downstream O2 sensor frequency and amplitude shall be much less than upstream, which is in ur case.
By the way PCM, runs its obd II monitor once per drive cycle to.check the catylytic converter efficiency whenever there is pre and post cat o2 sensors in place. U would see a pending or confirmed code if u have any issues, but in ur case waveform looka pretty ok.