AUDI A4 2.0L TDi 2004 107k
Lack of power and engine management light on, fault code stored for turbo overboost condition. Suspect fault due to sticking variable vanes on turbo.
The fault was cured by adding 2 x Diesel Turbo Cleaner and Advanced Formula Diesel Treatment into the fuel tank and carrying out an extended road test with varying loads and speeds of the engine.
Thanks to Mark at Michael Theobald Garage in Leyland, Lancashire.
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