156 1.9JTD 16V Sporadic power loss / motor control lamp

Hello, I have the following problem with my 156 1,9JTD 16V and need your help. at approx. 3000 u/min comes the engine control light and the car has NO power more. Stop off, restart, the error is gone until it occurs again at approx. 3000 u/min. Whereby the error does not always occur. Just sporadically but if then read out at approx. 3000 u/min. Error memory resulted following: Error code Overview: Motor – EDC 16CF3 OBD Error code: P0238 Charge pressure endor A – signal too high Error code: P0238 Charge pressure endor A – signal too high Error code: P0704 Clutch switch – signal faulty Error code: P0704 Clutch switch – signal incorrect Yes, the errors were listed 2 times. The charging pressure sensor and underpressure hoses have already been exchanged. Does anyone have an idea??