My C250d was poorly recently.
Yellow engine light.
Cannot measure Ad-Blue level.
Fault Codes:
13E400
204F96
13DF09
C16887
Having drained and dropped the Ad-Blue tank. I carried out continuity tests on all parts. The pump was fine. Level sender fine. However, the harness was at fault.
I have read one post online after a brief search stating that the harness can burn out from heat.
Positive voltage was nonexistent on the harness.
So for anyone else who experiences this issue feel free to keep this in mind.
Yellow engine light.
Cannot measure Ad-Blue level.
Fault Codes:
13E400
204F96
13DF09
C16887
Having drained and dropped the Ad-Blue tank. I carried out continuity tests on all parts. The pump was fine. Level sender fine. However, the harness was at fault.
I have read one post online after a brief search stating that the harness can burn out from heat.
Positive voltage was nonexistent on the harness.
So for anyone else who experiences this issue feel free to keep this in mind.
