Possible Causes
WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| (K471) DEF SUPPLY PUMP HEATER SUPPLY CIRCUIT OPEN/HIGH RESISTANCE |
| (K472) DEF SUPPLY PUMP HEATER RETURN CIRCUIT OPEN/HIGH RESISTANCE |
| (K471) DEF SUPPLY PUMP HEATER SUPPLY CIRCUIT SHORTED TO GROUND |
| (K472) DEF SUPPLY PUMP HEATER RETURN CIRCUIT SHORTED TO GROUND |
| DEF SUPPLY PUMP ASSEMBLY |
| DEF DOSING CONTROL UNIT |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L .