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Mazda Truck
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2003
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B2300 2WD L4-2.3L VIN D
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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P Code Charts
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P0420
P0420
Detection Condition / Possible Cause:
Step 1 - 3:
Step 4 - 6:
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Step 9 - 11: