After replacing the knock sensor (it was probably a mistake to replace it), the engine light is still on, indicating that the problem exists. Does anyone know how to solve this?

found this on a forum which may be a way forward

Quote

I then borrowed a more sophisticated OTOFIX OBD2 tool which found the fault codes.
Deleting the codes had no effect, as the same errors appeared instantly.
I then found the following two options under .... Special functions --> Service action --> Operations on faults related to self-ignition before spark (rumble)
1. "Reset number of self-ignitions before spark (rumble)"
and
2. "Reset of engine torque limitation after self-ignition before spark (rumble)"