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Home >> Mazda >> 2003 >> Tribute ES, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0403 Or DTC P1409 >> Possible Causes

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.

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