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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System & Fuel System - 6.6L (LLY) - DTC P0016 To DTC P0341) >> DTC P0191, P0192, or P0193 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
  • You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
  • 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. Verify that DTCs P0652 or P0653 are not set.
  2. Observe the Actual Fuel Rail Pressure parameter with a scan tool. During engine cranking, the pressure should be at least 10 MPa. With the engine running at idle, the pressure should be close to the Desired Fuel Rail Pressure. As the engine speed increases, the Desired Fuel Rail Pressure and the Actual Fuel Rail Pressure should closely match each other.
  3. Engine running, observe the DTC information with a scan tool. DTCs P0191, P0192 or P0193 should not set.
  4. 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 Records data.
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