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Detection Condition

WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.

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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