M2 Code 3031 / DEF Temp Sensor

DEF tem. sensor is installed in DEF tank intake column. it is combined with DEF level sensor. So start with connector. it is weak thing becouse if DEF was spilled on cooper wires they gonna be corroded.

What engine do you have? Cummins ore Mercedes?

 

so you should have small DEF tank under cab and it is made of plastic and DEF intake unit is held with big plastic nut.... wires run to uftertreatment unit.... inspect all this stuff

 

I have a volvo d13 2013 with code sa0 spn 3363 fmi2.any idea what is this or I can continue driving?no check engine or vehicle messages.thank you.

 

I have no easy answer to your quation.

This is AdBlue tank temperature problem.

U need Tech Tool to read freeze frame of faut code and tell me temperature of DEF recorded

may be really frozen fluid cant be melt with coolant flow, may be bad coolant valve ore may be really faulty DEF tank sensor built in sender unit

 

I have have the truck in the shop today. The code was gone next day. The service manager told me they are going to test the DEF pump make sure is working. 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.

 

dealers like to swap parts to solve problem one by one.... u know

 

Any luck with your truck? I have the same codes and I’m trying to figure out what is going on. I don’t want to just switch parts and be guessing. Any good leads or recommendations?