Possible Causes
WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| DEF TANK HEATER SUPPLY CIRCUIT OPEN/HIGH RESISTANCE |
| DEF TANK HEATER SUPPLY CIRCUIT SHORT TO GROUND |
| DEF TANK HEATER ASSEMBLY |
| DEF HEATER CONTROL UNIT (HCU) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .