What are the possible causes of DTC P1409 listed in this test?

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; damaged PCM.

Which PCM test pins are used and what voltage should be measured in step HE120?

With a breakout box installed and the PCM disconnected, measure voltage between PCM Test Pins 47 and 25 with key on; it must read greater than 10.5 volts.

What do I do if no fault is indicated during the wiggle test?

The fault could not be duplicated or identified at this time; go to Pinpoint Test Step Z1 with DPFEGR and EGRVR PID data and the list of Possible Causes.

What if P1409 was set during KOEO or KOER self-test instead of continuous memory?

Go to step HE110 to diagnose the present fault.

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Ford DTC P1409 Pinpoint Test HE120 - EGR Vacuum Regulator Solenoid Wiggle Test

Ford PCED DTC P1409 pinpoint test HE120: continuous-memory EGRVR wiggle test

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Service procedure (PCED) for continuous-memory DTC P1409: step HE120 wiggle-tests the EGR vacuum regulator solenoid while monitoring VPWR between PCM pins 47 and 25 (must stay >10.5 V).

AI caption January 2005 · Photo 36 of 56

This document is a screenshot of a Ford PCED (Powertrain Control/Emissions Diagnosis) pinpoint test, step HE120, addressing Continuous Memory DTC P1409. The code indicates the Continuous Memory Self-Test detected an electrical malfunction in the EGR vacuum regulator (EGRVR) solenoid at some point during vehicle operation. A note directs the technician to step HE110 if P1409 was output during KOEO or KOER self-tests, since that indicates a present fault. Listed possible causes include an open EGRVR circuit, open VPWR circuit to the solenoid, EGRVR circuit shorted to VPWR or ground, a damaged EGR vacuum regulator solenoid, or a damaged PCM. The test procedure directs installing a breakout box with the PCM disconnected, turning the key on, and measuring voltage between PCM Test Pins 47 and 25; the voltage must read greater than 10.5 volts. While monitoring, the technician taps the solenoid, wiggles its connector, and wiggles the harness wiring between the solenoid and PCM, watching for a voltage drop that indicates a fault. If a fault appears, the instruction is to isolate and repair it, restore the vehicle, and rerun the Quick Test. If not, the fault could not be duplicated, and the technician proceeds to Pinpoint Test Step Z1 with DPFEGR and EGRVR PID data and the list of possible causes.

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Frequently asked questions

What does Continuous Memory DTC P1409 mean?: It indicates the Continuous Memory Self-Test detected an electrical malfunction in the EGR vacuum regulator solenoid sometime during vehicle operation.
What are the possible causes of DTC P1409 listed in this test?: 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; damaged PCM.
Which PCM test pins are used and what voltage should be measured in step HE120?: With a breakout box installed and the PCM disconnected, measure voltage between PCM Test Pins 47 and 25 with key on; it must read greater than 10.5 volts.
What do I do if no fault is indicated during the wiggle test?: The fault could not be duplicated or identified at this time; go to Pinpoint Test Step Z1 with DPFEGR and EGRVR PID data and the list of Possible Causes.
What if P1409 was set during KOEO or KOER self-test instead of continuous memory?: Go to step HE110 to diagnose the present fault.