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In a Mercedes Sprinter vehicle, if the Code 43c0 appears, it indicates that the voltage supply is too low, usually related to the pump power supply. To address this issue, you should inspect fuse F4 with a 40-amp rating as it is prone to blowing. To check if the fuse is blown, remove it from its holder, and examine the fuse wire for any visible gap, dark marks, or metallic residue in the glass. If you notice any of these signs, the fuse needs to be replaced. You can find replacement fuses at local auto parts stores like Advance Auto Parts and Auto Zone. Be sure to choose a fuse that matches the correct amp and size of the one you are replacing.
In a Mercedes Sprinter, error code 43c0 indicates that the voltage supply is insufficient, commonly linked to the power supply for the pump.