Error codes on 2011 x5 35d

[LSX5]

Has anyone come across these codes. My wife's 2011 x5 35d keep getting these codes. I erase them and they come back after driving shortly.
Any ideas ?
Sorry picture is blurry for some reason.
Here are the codes
DME/DDE/4B1C fuel filter heating activation
DME/DDE/4BCC reducing agent passive tank fill level sensor, signal
Thank you

[VolksFan]

4B1C should be the fuel preheater by the fuel filter, have seen some of those go bad causing the activation code you have.
Not familiar with the 4BCC code. Hope this helps.

[RL18]

Did you clear the codes? And did they come back? Is your def fluid full? That would really suck if you passive fill sensor crapped out on you...

[LSX5]

Originally Posted by RL18

Did you clear the codes? And did they come back? Is your def fluid full? That would really suck if you passive fill sensor crapped out on you...

I have deleted the code but keeps coming back.
Any idea what this may run me if I have to change the sensor?

[RL18]

Originally Posted by LSX5

I have deleted the code but keeps coming back.
Any idea what this may run me if I have to change the sensor?

The sensor is built into the def tank. So you'll have to replace the whole thing. I would think you'd be getting a def count down if it was bad though

[LSX5]

Originally Posted by RL18

The sensor is built into the def tank. So you'll have to replace the whole thing. I would think you'd be getting a def count down if it was bad though

thank you guys for info.
I will try to top off DEF and reset code