C350e Coolant pump fault

[SAKA888]

Hello,

I get fault code U121D87 (Comunication with pump Faulty, message is lost) and pump runs constantly. I can`t also select E mode. Sometimes i get fault code U301700 (Real Time Clock is faulty).

Anyone have any suggestions whats wrong?

 

[ernieh]

Hello,

I get fault code U121D87 (Comunication with pump Faulty, message is lost) and pump runs constantly. I can`t also select E mode. Sometimes i get fault code U301700 (Real Time Clock is faulty).

Anyone have any suggestions whats wrong?

Did you get the codes read? sorted?

Ernie

 

[mah_yabroudy]

Did you get the codes read? sorted?

Ernie

Hi Ernie,

Currently I have the same issue, could you please tell me how you fix it


Thank you

 

[alexanderfoti]

I would hazard a guess at faulty pump!