17965 is a diagnostic code related to charge pressure control issues in turbocharged engines. It indicates a positive deviation in boost pressure, often caused by sticking VNT vanes inside the turbocharger. Common symptoms include reduced power output and limp mode, particularly during cruising or cold starts. Troubleshooting may involve checking hoses, pipes, and the solenoid valve (N75) for defects or blockages, as well as inspecting sensors like the MAP sensor. Proper diagnosis helps identify whether the issue stems from mechanical components such as the turbo vanes or electronic controls like the N75 valve, ensuring accurate resolution of overboost conditions.
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