Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2006 >> Chevy Express G2500, Van Cargo Extended, 6.6 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 6.6L (LLY) - DTC P0401 To DTC P268A >> DTC P2564 or P2565 >> Circuit/System Verification

Circuit/System Verification

IMPORTANT: If you cannot duplicate the condition, operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
  1. If DTC P0698 or P0699 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnostics.
  2. With the engine running, observe the turbocharger (TC) vane position sensor and the desired TC vane position. Slowly increase the engine speed to 2,500 RPM, then return the engine speed to idle. The TC Vane Position Sensor parameter should remain very near or equal to the desired TC Vane Position parameter.
    • If the parameter values do not follow each other, or stay near to or equal to the commanded position, continue with this diagnostic.
scientia non olet · About Mike's Workshop Manuals