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Home >> Mazda >> 2002 >> B2300 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1409: EGR Vacuum Regulator Circuit Malfunction >> Detection Condition
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Detection Condition

DTC P1409 indicates self-test has detected an electrical malfunction in EGRVR circuit. EGR Vacuum Regulator (EGRVR) solenoid receives a variable duty cycle signal from PCM. The higher the duty cycle, the more vacuum the solenoid diverts to EGR valve.

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