HE75 - Check DPFE Sensor Output - Apply Vacuum With Hand Pump

- Key Off.

- Disconnect pressure hoses at DPFE sensor.

- Connect a hand vacuum pump to the downstream pickup marked "REF" on the DPFE sensor.

- Key On, Engine Off.

- Access DPFE PID with a Scan Tool. PID voltage should be 0.45 volt ± 0.25 volt.

- Apply 8-9 inHg vacuum to the DPFE sensor. The PID voltage should be above 4.0 volts. Quickly release vacuum from sensor. PID voltage should drop to less than 1.0 volt in less than 3 seconds.

- Does the DPFE PID voltage indicate a fault in the DPFE sensor?

YES -- REPLACE damaged DPFE sensor. RECONNECT all components. Complete PCM reset to clear DTCs. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- RECONNECT pressure hoses. GO to HE76. HE76 - Check EGR Valve Function - Apply Vacuum With Hand Pump