DL30 - Verify Vacuum Present At EGR Valve

Diagnostic Trouble Code (DTC) 332 indicates the Pressure Feedback EGR (PFE) / Differential Pressure Feedback EGR (DPFE) sensor signal to the Powertrain Control Module (PCM) did not change when the PCM output a duty cycle to the EGR Vacuum Regulator (EVR) solenoid requesting EGR flow. Possible causes are:

- Icing

- Obstructed EGR passages

- Vacuum hose leaks.

- Obstructed vacuum hoses.

- Damaged EVR solenoid.

- Damaged PFE/DPFE sensor.

- Damaged EGR valve.

- Damaged PCM.

- Key "OFF".

- Disconnect and inspect vacuum hose between EVR solenoid and EGR valve for blockage, kinks, etc. Service as necessary and reconnect after inspection.

- Disconnect vacuum hose at EGR valve and connect hose to a vacuum gauge.

- Rerun Key On Engine Running (KOER) Self-Test while observing vacuum gauge. Key ON Engine Running (KOER) Self-Test

- Is vacuum reading less than 3kPa (1 in-Hg) throughout the test (disregard DTC output)?

Yes -- Remove vacuum gauge. Go to DL31. DL31 - Check Vacuum Input to the EVR Solenoid

No -- Remove vacuum gauge. Reconnect EGR valve vacuum hose. RERUN Quick Test if the vacuum hose was not in good condition and service was completed. Quick Test Appendix (Detailed Testing Instructions)

Otherwise, go to DL34. DL34 - Check Signal at the PFE/DPFE Inlet Hose(s)