What does the OMMCO fault code 3363 mean?

[McCaroline]

It may indicate that the voltage of the post-processing fluid tank heater is higher or lower than the normal value. It is recommended to consult the dealer. Below are the relevant explanations: 1. Sensor reversed: The direction of the coolant pipeline is reversed / the tank heating control valve is reversed / the post-processing fluid level temperature sensor is reversed: Check whether the coolant pipeline, the tank heating control valve, and the post-processing fluid level temperature sensor are reversed. 2. Tank heating valve always open: Perform the "Diesel Engine Urea Injection System Heater Test" to check whether the tank heating valve is working properly. Refer to the test manual. If blockage or mechanical failure is found, repair or replace the heating valve. 3. Wrong model of tank heating valve: Check whether the model of the tank heating valve matches the ECM model. Clear the fault code and run at 40% reduced power after 50 hours: Take the vehicle to an authorized service station for inspection within 50 hours.