Originally Posted by FatCat03
C0578 - Left Front Solenoid Circuit High
Whatever your problem is, it is located at the LF strut.
From your original post
"dummy sensors installed both front and rear."
Whatever you installed at the LF (strut) connection has failed or is not connected properly.
Since you replaced only the shocks, I can only guess at why you would be messing with the front end.
Minor point, but those are not sensors. Arnott provides "resistors" that fake the suspension system control module into seeing an electrical load that is similar to the electrical load of the OEM parts. The complete system theory of operation is much more than 90% of drivers have any interest in knowing.