Quote:
Originally Posted by andreigbs
I believe there's a break in the circuit, but I couldn't see any obvious breakage of wires, plugs, or harness. It was quite cold this past winter, getting down to -20*F on my drive to work, it's possible the heating element burnt itself out or burnt wire(s) along the DEF heater line. But again, I don't see anything obvious on the outside looking up and down the line itself.
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Did you ever sort this out? I'm at the same point, I have a CEL for this code as well on my 2015 X3d. Unsure about whether the issue is the metering unit, which seems doable, or the line, which is daunting with a subframe drop.