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Home >> Buick >> 2015 >> Verano Leather >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 2.0L (LHU) - DTC P025A To DTC P2635 Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2261: Turbocharger Bypass Valve Stuck >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Verify that DTC P0033, P0034, or P0035 is not set
  2. Engine running, command the Turbocharger Bypass Solenoid Valve between Active and Inactive with a scan tool. A click should be heard and felt.
  3. Set up the scan tool for a snapshot of the induction data list. With the emergency brake on, the vehicle transmission in neutral, and the engine idling, perform a wide open throttle and then quickly release the accelerator. Review the Boost Pressure Sensor parameter. There should not be any abnormal pulsations of the parameter.
  4. With the parking brake ON and the engine idling in neutral, perform an audible test of the valve by depressing the throttle wide open, then quickly releasing it to a closed throttle position. A valve that is stuck shut will generate a rapid pulsating or fluttering sound. There should not be any unusual noise.
  5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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