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P0420 Diagnostic Trouble Code Discussion for December 2010

Catalyst Efficiency Below Normal (Bank 1)

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Trouble Ticket Help Requests for DTC P0420
Help Request Posted
2003 Mini Cooper S 1.6L Excessive Emissions VIN: WMWRE33453
P0420: oxygen storage capacity. customer stated to us that the vehicles catalytic converter gets red hot, after driving for vehicle for at 30-45 min. the check engine light is on(po420) and the flex pipe before cat and after manifold was melted. customer replaced damaged flex pipe and the ox...
December 13, 2010
2000 Dodge Caravan SE 3.3L Monitors won't run VIN: 2B4GP45G5Y
P0420: Catalyst Efficiency Below Normal (Bank 1). ... to run O2,cat and egr monitors.needs 1 more monitor to run to pass Illinois emissions.checked all the forums,tried what I thought was applicable,still no go.Tried driving the trace that Rick E.had posted...didn't work either..No codes,no pending codes,had ...
December 17, 2010