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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
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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 P0401: Exhaust Gas RECIRCULATION System Insufficient Flow Detected
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Possible Causes
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Possible Causes
EGR boost sensor malfunction.
EGR boost sensor solenoid valve malfunction.
EGR valve base gasket improperly installed.
EGR valve malfunction.
PCM malfunction.