Do you have access to Mitchell1 Prodemand, or eautorepair.net DIY? If you are willing to share user/password (we can pay), please get in contact with us ASAP (truly, it is urgent): email operation-charm [[at]] tuta.io or click to submit anonymously
DN21 - Rerun KOEO and KOER Self-Test W/EGR Vacuum Disconnected
- Disconnect vacuum hose from EGR valve and plug hose.
- Rerun Key On Engine Off (KOEO) and Key On Engine Running (KOER) Self-Test. Quick Test Appendix (Detailed Testing Instructions)
- Is Diagnostic Trouble Code (DTC) 334 present?
Yes -- Go to DN22. DN22 - Check EVP Sensor and EGR Valve Operation
No -- Check EGR Vacuum Regulator (EVR) solenoid for obstructions. Service as necessary. If OK, replace EVR solenoid. Reconnect all vacuum hoses. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)