Recurring P0430 Catalyst System Low Efficiency Bank 2. Replaced B2S2 Oxygen Sensor (GM OEM) and found a loose ground (repaired) Problem still persists. B2S2 Graph looks very similar to B1S1 (fluctuates between .100 and 900mv. For comparison. B1S2 is rel...

FIX posted 4/18/2022

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