2 days ago · Ecoboost Boost Leak/Overboost / DTC P0234 - Troubleshooting + Video. I decided to create a detailed video of the boost leak issue I was having with my car. Its pretty incredible that Ford hasn't recalled this part. Its worth a watch if you own a ecoboost engine. 18 Volvo S90 Inscription - 2.0T Twin Charged - Polestar Tuned. I have been troubleshooting an overboost issue (PO234) on my son's Focus and as a result replaced the turbocharger with a new turbocharger from Ford.. As I replaced other components before this (e.g., wastegate solenoid, MAP and MAF sensors), I was hoping swapping with a new OEM turbo would so This is a common symptom of a faulty turbo, you may hear a whining or screeching sound. Because of this, if you hear a whining sound while your car is running. It is most likely due to a turbo issue. To replace an EcoBoost turbo, how much does it cost? Changing the turbocharger assembly on a Ford F-150 costs an average of between $1,123 and $1,246. Constant clicking or tapping sounds are probably just the injectors as already mentioned but if it's a metallic rattle then maybe your turbo is about to fail or something else concerning. Ecoboost engines are wonderful when they are running well but nightmarish when something goes mechanically wrong. Take it to a Ford dealer as they will know The three pipes are Vent, Turbo Actuator, Vacuum pump. (Your loose pipe is the vent, as you say.) The Actuator can be connected to either Vent or Pump, depending whether the valve is energised or not. I think vacuum puts the turbo into low / no boost condition, and then allowing air in via the vent puts it into boost condition. L6n7li.