DB22 - Check For Continuous Memory Code 326

- Rerun Key On Engine Off (KOEO) Self-Test.

- Is Continuous Memory Diagnostic Trouble Code (DTC) 326 present?

Yes -- Remove vacuum pump. Reconnect vacuum hose. Refer to Emission Control Systems for EGR system diagnosis.

No -- Remove vacuum pump. Replace EGR Temperature (EGRT) sensor. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)