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A 2010 Volkswagen Touareg 3.0TSI sport utility vehicle with a mileage of about 80 thousand km. User response: after the vehicle is running at high speed, the engine stalls without regularity. Because the fault is difficult to reproduce, the problem has been repaired several times. Inspection and analysis: maintenance personnel detect engine control unit, no failure code. For a period of time, no problems were found. In order to reproduce the fault, the maintenance personnel decided to connect the fault diagnosis apparatus for long-distance trial run.