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P0420 and P0430 codes - Honda Accord Forum - Honda Accord Enthusiast Forums
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I have been told the AF sensor is bad and the Cat needs replacement
Honda P0420 Error: Q&A on 2003 Accord EX and Common Honda Issues
P0420, Accord 2005, 3.0L, 215k+ Miles - Honda Accord Forum - Honda
⭐ 2010 Honda Accord - 2.4 - P0420 - Catalyst Efficiency Below Threshold
P0420 Codes Catalytic Conveter Replacement - Honda Accord Forum - Honda
How to replace knock sensor without taking off the intake. Honda Accord
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