Diagnostic system for compensating a driven by a camshaft valve actuating component

thereof a diagnostic system and a method for operating comprise a pressure monitoring module, which generates a diagnostic pressure signal, and a correction module for a driven by a camshaft engine component that generates an engine components oil pressure correction signal and generates a corrected diagnostic pressure signal based on the diagnostic pressure signal and the engine components oil pressure signal. The system further comprises a diagnostic module generating a signal for a faulty mechanism with variable valve lift based on the corrected diagnostic pressure signal.