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To troubleshoot Freightliner code SPN 2071, which typically indicates a problem with the engine's turbocharger boost pressure, start by checking for any obvious air leaks in the intake system, including hoses and connections. Next, inspect the turbocharger and its wastegate for proper operation and ensure that the boost pressure sensor is functioning correctly. Use a diagnostic tool to monitor live data and confirm whether the boost pressure is within the expected range. If necessary, perform further tests on the turbocharger and related components, and clear the fault code after repairs.

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3mo ago

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