What does DTC P1409 mean on a Ford?

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 out of that range, replace the EGR vacuum regulator solenoid, restore the vehicle, complete a PCM Reset to clear DTCs, and rerun the Quick Test.

What are possible causes of a P1409 code?

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.

What voltage should VPWR read at the EGR vacuum regulator solenoid connector?

With key on, engine off, VPWR voltage at the solenoid harness connector should be greater than 10.5 volts. If not, repair the open in the VPWR circuit.

What happens after the VPWR voltage check passes in test HE111?

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

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Ford DTC P1409 EGR Vacuum Regulator Diagnosis - PCED Pinpoint Test HE110-HE112

Ford PCED DTC P1409 pinpoint test HE110/HE111: EGRVR solenoid resistance and VPWR

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Service procedure (PCED) for DTC P1409 EGRVR fault; duplicate of HE110-HE111 steps: solenoid resistance 26-40 ohms, VPWR voltage greater than 10.5 V at the connector.

AI caption January 2005 · Photo 34 of 56

This document is a screenshot of Ford's Powertrain Control/Emissions Diagnosis (PCED) online manual showing the pinpoint test procedure for Diagnostic Trouble Code (DTC) P1409, which indicates an electrical fault in the EGR Vacuum Regulator (EGRVR) circuit. Step HE110 lists possible causes (open EGRVR circuit, open VPWR circuit to the EGR vacuum regulator solenoid, EGRVR shorted to VPWR or ground, damaged EGR vacuum regulator solenoid, or damaged PCM) and instructs the technician to disconnect the solenoid and measure its resistance. If resistance is between 26 and 40 ohms, the test proceeds to step HE111; if not, the solenoid is replaced and a PCM Reset and Quick Test are performed. Step HE111 checks VPWR voltage at the solenoid harness connector with key on, engine off. If voltage exceeds 10.5 volts, testing continues to HE112 (check EGRVR circuit for open in harness); otherwise the technician repairs the open VPWR circuit. The page shows the beginning of step HE112 but its details are cut off (likely continued on subsequent pages in this album). A reader learns the specific resistance and voltage specifications and the decision-tree flow for diagnosing a P1409 code.

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Frequently asked questions

What does DTC P1409 mean on a Ford?: 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 out of that range, replace the EGR vacuum regulator solenoid, restore the vehicle, complete a PCM Reset to clear DTCs, and rerun the Quick Test.
What are possible causes of a P1409 code?: 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.
What voltage should VPWR read at the EGR vacuum regulator solenoid connector?: With key on, engine off, VPWR voltage at the solenoid harness connector should be greater than 10.5 volts. If not, repair the open in the VPWR circuit.
What happens after the VPWR voltage check passes in test HE111?: If voltage was greater than 10.5 volts, you go to HE112 to check the EGRVR circuit for an open in the harness.