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International Automotive Technicians Network
Re: 2001 Dodge Neon P0420
Posted to Emissions Forum on 10/4/2007

WELL, you could throw the frequency check at em I suppose? It was from their own approved CACC manual that said 1 of the approved O2 tests was 6 switches in 5 seconds at 2000 if I remember, yours misses by 1, and it looks pretty sad on frequency at idle also. ... Login to read more.