The reductant tank heater heats the def to prevent the fluid from freezing.
Cummins def tank heater control valve.
That is for the tank heater or heater control valve.
It should have a heater but i don t know if the dodge does.
Sorry for the typo.
I work on much larger vehicles and they have engine coolant run through the tank.
It begins to freeze around 12 f give or take.
View all 31 cummins 121 detroit 5 n a 6 other.
If this happens then the wiring def control unit module and pcm are good.
The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded and closes when heating is no longer required the diesel.
Good used def control module freightliner cascadia part 281020225.
There are line options offered in nylon and ethylene propylene diene monomer epdm materials for both purging and non purging dosing systems.
The def tank heater only runs when the truck is running the def tank heater may or may not go in 30 second cycles of on and off and may or may not cycle based on def temp or exterior temp neither are sure what temp sensor triggers the heater to kick in nor at what temp.
These are peterbilt parts and not cummins.
The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank.
If the engine control module pcm detects the reductant tank heater is not operating properly it will set code p20b2.
There s a temp sensor and a solenoid on the coolant line to control flow so the def doesn t overheat.
With the scan tool hooked up see if code p20b9 def supply line heater circuit high input is now active after 15 seconds.
Def quality sensor new for 2016 epa regulations def tank sensor assembly for level and temperature now fitted with quality sensor quality sensor must detect 32 5 concentration of def use def meeting iso22241 specifications for purity and composition store def in a cool dry well ventilated area out of direct sunlight.
You need to seek a pete shop first as a cummins shop will charge you more to repair pete issues and may not have those types of parts in stock def controller not red controller.
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Powertrain control module pcm failure symptoms.
Def quality and maintenance for selective catalytic reduction scr.
He thinks either the heater for the def or the temp sensor could be the problem cause i used enough def even more than usually so pump is working for sure.
May be bad coolant valve ore may be really faulty def tank sensor built in sender unit pablo ua dec 21 2016.
For this code the easiest thing to do unplug the def supply line heater connector.
Please see pictures.
Or the red controller is making the heater continuously run that controller is a cummins part.
