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2003
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Tribute LX, 4WD
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Repair and Diagnosis
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Section 61 (Engine Controls - Self-Diagnostics)
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Diagnostic Tests
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DTC P0402: EGR System - Excessive Flow
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Possible Causes
Possible Causes
WARNING:
This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
EGR valve gasket damaged or missing.
PCM malfunction.