Possible Causes
WARNING: This page is about a different variant/trim than selected.
| Possible Causes |
|---|
| FROZEN DEF |
| CONTAMINATED DEF |
| OLD OR STAGNANT DEF IN TANK DUE TO EXTENDED STORAGE |
| DEF AERATION DUE TO RAPID TEMPERATURE CHANGE, ALTITUDE CHANGE, OR REFILL |
| DEF QUALITY SENSOR |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .