DL105 - Check EGR Valve Operation

Diagnostic Trouble Code (DTC) 332 Pressure Feedback EGR (PFE) / Differential Pressure Feedback EGR (DPFE)

Possible Causes:

- EGR valve sticking closed.

- EGR valve diaphragm leaks.

- EGR Vacuum Regulator (EVR) solenoid sticking closed.

- Loss of vacuum to or from EVR.

- Open in EVR VPWR or driver circuits.

- Leak or restriction in PFE/DPFE signal hoses.

- Key "OFF".

- Connect a vacuum pump to the EGR valve.

- While observing the EGR valve, slowly apply 34 kPa (10 in Hg) vacuum.

NOTE: EGR valve should begin to open with a small amount of vacuum, 3 to 5 kPa (1 to 1.5 in Hg), and be fully open with about 13 kPa (4 in Hg). EGR valve should remain open with vacuum applied. Diaphragm could be leaking if the valve closes immediately.

- Does the EGR valve open smoothly and hold vacuum?

Yes -- Go to DL106. DL106 - Inspect EVR Solenoid Hoses

No -- Remove and Inspect the EGR valve for signs of diaphragm damage or leakage, contamination, unusual wear, carbon deposits, binding, and other damage. Service as necessary (Use Rotunda EGR valve cleaner 021-80056 if needed). Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)