What does DTC P1409 mean?

Per this document, DTC P1409 indicates that the Self-Test has detected an electrical fault in the EGRVR (EGR vacuum regulator) circuit.

What is the resistance specification for the EGR vacuum regulator solenoid?

The solenoid resistance should be between 26 and 40 ohms. If it is outside that range, replace the EGR vacuum regulator solenoid, complete a PCM Reset to clear DTCs, and rerun the Quick Test.

What are the possible causes of P1409?

Open EGRVR circuit, open VPWR circuit to the EGR vacuum regulator solenoid, EGRVR circuit shorted to VPWR, EGRVR circuit shorted to GND, damaged EGR vacuum regulator solenoid, or damaged PCM.

How is VPWR voltage checked in test HE111?

With the key on and engine off, measure VPWR circuit voltage at the EGR vacuum regulator solenoid harness connector, then key off. Voltage should be greater than 10.5 volts; if not, repair the open in the VPWR circuit.

What happens if VPWR voltage passes in HE111?

If voltage was greater than 10.5 volts, go to test HE112, which checks the EGRVR circuit for an open in the harness.

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Ford DTC P1409 EGR Vacuum Regulator Solenoid Pinpoint Test HE110-HE112 (PCED)

Ford PCED DTC P1409 pinpoint test HE110: EGR vacuum regulator solenoid resistance

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Service procedure (PCED) for DTC P1409 EGRVR fault: step HE110 checks EGR vacuum regulator solenoid resistance, HE111 checks VPWR voltage; good solenoid reads 26-40 ohms.

AI caption January 2005 · Photo 33 of 56

This document is a screenshot of a Ford Powertrain Control/Emissions Diagnosis (PCED) service procedure page for Diagnostic Trouble Code P1409, which indicates the Self-Test has detected an electrical fault in the EGRVR (EGR vacuum regulator) circuit. It lists possible causes: an open EGRVR circuit, an open VPWR circuit to the EGR vacuum regulator solenoid, EGRVR shorted to VPWR, EGRVR shorted to ground, a damaged EGR vacuum regulator solenoid, or a damaged PCM. Step HE110 instructs the technician to disconnect the EGR vacuum regulator solenoid and measure its resistance; if resistance is between 26 and 40 ohms, the solenoid is within specification and testing continues at HE111, otherwise the solenoid should be replaced, the vehicle restored, a PCM Reset completed, and the Quick Test rerun. Step HE111 checks VPWR voltage at the solenoid harness connector with the key on and engine off; if voltage exceeds 10.5 volts, testing continues at HE112, otherwise an open in the VPWR circuit must be repaired. The page ends at the heading for step HE112, which checks the EGRVR circuit for an open in the harness. A reader learns the exact pinpoint test sequence, specifications, and pass/fail actions for diagnosing DTC P1409.

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Frequently asked questions

What does DTC P1409 mean?: Per this document, DTC P1409 indicates that the Self-Test has detected an electrical fault in the EGRVR (EGR vacuum regulator) circuit.
What is the resistance specification for the EGR vacuum regulator solenoid?: The solenoid resistance should be between 26 and 40 ohms. If it is outside that range, replace the EGR vacuum regulator solenoid, complete a PCM Reset to clear DTCs, and rerun the Quick Test.
What are the possible causes of P1409?: Open EGRVR circuit, open VPWR circuit to the EGR vacuum regulator solenoid, EGRVR circuit shorted to VPWR, EGRVR circuit shorted to GND, damaged EGR vacuum regulator solenoid, or damaged PCM.
How is VPWR voltage checked in test HE111?: With the key on and engine off, measure VPWR circuit voltage at the EGR vacuum regulator solenoid harness connector, then key off. Voltage should be greater than 10.5 volts; if not, repair the open in the VPWR circuit.
What happens if VPWR voltage passes in HE111?: If voltage was greater than 10.5 volts, go to test HE112, which checks the EGRVR circuit for an open in the harness.