Diagnosing Catalytic Converter P0420 Code
Diagnosing Catalytic Converter P0420 Code
Feb 2, 2022
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How to fix PO420 code (Cadillac)
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P0420: Catalyst System Efficiency Below Threshold (Bank 1) - OBD ADVISOR
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obdadvisor.com
PO420/PO430? Don’t just replace your cat — VERIFY the fix! Too many techs skip the most important step: confirming the catalytic converter actually solved the issue. 🛠 In this clip, Oscar Gomez shows how to use live data, fuel trim, and Mode 6 to validate the repair. 🎥 Watch the full walkthrough on YouTube → https://www.youtube.com/watch?v=bulzVWNNuyc Master the process. Save the comeback. #PO420Fix #AutomotiveDiagnostics #ScanToolTraining #CatalyticConverter #MasterAutomotiveTraining
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