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Home >> Mazda >> 2004 >> 3 s, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System] >> DTC P0031: Front Ho2S Heater Circuit Low Input >> California Emission Regulation Applicable Module
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California Emission Regulation Applicable Module

Fig 1: DTC P0031: Detection Condition & Possible Causes Chart (1 Of 2)
G00974395Courtesy of MAZDA MOTORS CORP.
Fig 2: DTC P0031: Detection Condition & Possible Causes Chart (2 Of 2)
G00974396Courtesy of MAZDA MOTORS CORP.