LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0335 To DTC P2635 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P2261: Turbocharger Bypass Valve Stuck >> Circuit/System Testing

Circuit/System Testing

    NOTE:

    Leave harness connector connected or re-connect it after removing valve.

  1. Ignition Off, remove the Q40 Turbocharger Bypass Solenoid Valve from the turbocharger, ignition On.
  2. Verify the turbocharger bypass valve plunger retracts and extends when commanding the Turbocharger Bypass Solenoid Valve between Active and Inactive with a scan tool.
    • The valve plunger does not retract and extend 

      Replace the Q40 Turbocharger Bypass Solenoid Valve

    • The valve plunger retracts and extends 
  3. Verify the conditions listed below do not exist with the turbocharger assembly. Refer to Turbocharger Cleaning and Inspection
    • Cracked, damaged or worn turbine blades
    • Restricted wastegate, turbine, ports or passages
    • Foreign material
    • If a condition exists 

      Repair or replace the turbocharger as necessary

    • If none of the conditions exist 
  4. Replace the Q40 Turbocharger Bypass Solenoid Valve
scientia non olet · About LEMON Manuals