Volkswagen 03 Bora 1.8t Fault p 1297 What is the problem of pressure drop between exhaust turbocharger and throttle?

Hello! This needs to be checked from three aspects: 1, whether the negative pressure at the air inlet of the supercharger is too large is generally caused by the serious blockage of the air filter. The air filter is seriously blocked, which leads to the decrease of air entering the engine and the decrease of supercharging pressure; 2. Check the connecting pipe from the supercharger outlet to the engine throttle to see if there is air leakage. If there is air leakage, it will directly lead to insufficient pressure and pressure drop! 3. Check the joint between the engine exhaust manifold and the turbine for air leakage. If there is air leakage, it means that the power of the turbine is insufficient; 4. Check whether there is any fault in the supercharger, such as scratching the shell and poor operation of the suspension bearing! It is suggested to focus on articles 2 and 4.