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Home >> Mazda >> 2004 >> MX-5 Miata LS, Standard, Y16MD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic (Engine Control System BP, BP With TC] >> DTC P0420: Catalyst System Efficiency Below Threshold >> Notes
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DTC P0420: Catalyst System Efficiency Below Threshold: Notes

Fig 1: Possible Causes - DTC P0420 [BP, BP With TC]
G00992752Courtesy of MAZDA MOTORS CORP.
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