LEMON Manuals
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Mazda
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2003
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Tribute ES, FWD
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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 P0403 Or DTC P1409
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Possible Causes
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Possible Causes
Possible causes are:
EGRVR circuit shorted to GND.
EGRVR circuit shorted to VPWR.
Damaged EGRVR solenoid.
Damaged PCM.
Open EGRVR circuit.
Open VPWR circuit to EGRVR solenoid.