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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1409: EGR Vacuum Regulator - Circuit Malfunction >> Possible Causes

Possible Causes

Possible causes are:

Open EGRVR circuit.
Open VPWR circuit to EGRVR solenoid.
EGRVR circuit shorted to VPWR.
EGRVR circuit shorted to GND.
Damaged EGRVR solenoid.
Damaged PCM.

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