When catalyst is good normal waveform is 0.600-0.700 V on idle with very little oscillations. But everything above 0.500V will NOT set up a code . If B1S2 is following B1S1 with oscillation then cat is ready for replacement cause didn't doing job that is supposed to do. Waveform show a rich reading ...
Hi to all, I am diagnostic based service owner who works on car's where scan tool's are useless I am using SIA 3000 and Matco handheld oscilloscope and I am like the rest of you addicted to LSD (Lab Scope Diagnostic)