Good Afternoon I have had my Audi A7 diagnostics done and error code is PO234 I have paid £400 for diagnostics and was told it could be map sensor, which replaced still have same problem. The diagnostics garage also said the DPF has been removed from demaped what ever that means Been looking online and the code is turbo over boosting which can blow the engine Any help would be appreciated , don't want to keep replacing parts that don't need replacing Thanks