HE30 - 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.

- Key On, Engine Off.

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

- 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 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 DPFE sensor. GO to HE31. HE31 - Check DPFE SIG Voltage While Exercising EGR Valve