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Mazda
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2010
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3 L4-2.0L
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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P Code Charts
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P0421
P0421
DTC P0421:00 [LF, L5]
Detection Condition/Possible Cause:
Diagnostic procedure
Step 1-Step 8:
Step 9:
