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Home >> Chevrolet >> 2009 >> Chevy Express G2500, Van Cargo Extended, 6.6 6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L LMM - DTC P0016 To DTC P02E0 >> DTC P0090 >> Circuit/System Verification

Circuit/System Verification

  1. Turn ON the ignition and observe that the Desired FRP Regulator parameter and the FRP Regulator Command are at the same mA values. The FRP Regulator Command should be at 16 percent.
  2. The fuel pressure difference between the Actual Fuel Rail Pressure and the Desired Fuel Rail Pressure should be less than 5 MPa.
  3. 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 data.
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