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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 P0299 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Verify that DTCs P003A, P0045, P0698, P0699, P2563, P2564 or P2565 are not set.
  2. Verify the integrity of the entire air induction and turbocharger pipes and hoses by inspecting for the following conditions:
    • Any damaged components
    • Loose or improper installation
    • Wet or restricted air filter
    • Exhaust leaks before the turbocharger
    • Exhaust restrictions after the turbocharger
    • In cold climates, inspect for snow or ice build-up at the air cleaner, MAF sensor, and MAP sensor.
  3. Engine running, use a scan tool to command the TC Vane Pos. Ctrl. Solenoid ON.
  4. Perform a snapshot of the engine data while slowly increasing the engine speed to 1,700 RPM, and then back to idle. Refer to Scan Tool Snapshot Procedure .
  5. Plot the snapshot and verify that the MAP sensor parameter increases smoothly as the engine speed is increased and decreased smoothly as the engine speed is returned to idle.
    • If the MAP parameter plot slope is not a straight line with even RPM change, replace the MAP sensor.
  6. Engine running, observe the DTC information with a scan tool. DTC P0299 should not set.
  7. 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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