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Mazda
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2003
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MX-5 Miata Base, Automatic
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P0402: Exhaust Gas RECIRCULATION System Excessive Flow Detected
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Possible Causes
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Possible Causes
EGR valve base gasket damaged or missing.
PCM malfunction.