The thawing of the SCR system parts is too slow due to electrical failure.
1. Use the diagnostic tool to run the SCR thawing test. This test checks both the coolant circuit and any electrical heaters in the SCR system. 2. If a failure has been found and corrected, start the engine. When the reductant dosing unit temperature and the reductant tank temperature indicate that the system is thawed, the system is started and the fault codes will be inactivated. 3. If no fault is found in the thawing system, ensure that the system is thawed before proceeding with troubleshooting of any other DTCs
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
The reductant dosing system has been attempting to thaw the system for too long without being able to start
1. Electrical failure on the tank heater valve (V118) 2. Electrical failure on the hose heater 1 3. Electrical failure on the hose heater 2 4. Electrical failure on the hose heater 3 5. Electrical failure on the hose heater 4 6. The supply voltage has been too low since enging startup