DL97 - Check EVR Solenoid and Hoses

An EGR Vacuum Regulator (EVR) solenoid that is not functioning properly can cause the EGR valve to open or remain open when EGR is NOT demanded (such as at idle).

- Key "OFF".

- Inspect the EVR solenoid vacuum hoses and solenoid closely for the following:

- Restriction in the vacuum hoses.

- Signs of contamination, icing or moisture at EVR and in hoses.

- Excessive contamination in the EVR filter.

- Is a fault indicated?

Yes -- Isolate fault and service as necessary. Reconnect all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

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

No -- Reconnect all components. Go to DL98. DL98 - Check EVR Solenoids For Shorts