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Home › Mazda › 2005 › 3 i, Automatic › Repair and Diagnosis › Engine Performance › System › On-Board Diagnostic [Engine Control System] › DTC P0421 › California Emission Regulation Applicable Model › Notes

California Emission Regulation Applicable Model: Notes

Fig 1: DTC P0421 Detection Condition & Possible Causes
G03768759Courtesy of MAZDA MOTORS CORP.
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