July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC 4: Program Switch: Explanation

This defect code is stored when at the same time 2 or 3 of the wires to the control unit pins No. 4 (S program), No. 14 (E program), No. 15 (M program) have a short to ground. Program changeover is not possible as a result.