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Persistant codes P0420 and P0430 | Honda Ridgeline Owners Club Forums
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Need help troubleshooting 2005 Honda Odyssey codes P0171/P0174 and P0420.
Honda Odyssey P0420: Bank 1 Location & DTC Code Explained
P0420 Engine Diagnostic Code For 2011 Honda Odyssey
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Persistant codes P0420 and P0430 | Honda Ridgeline Owners Club Forums