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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.6L (LGH) - DTC P0016 Through DTC P11DC >> Diagnostic Information and Procedures >> DTC P0106 >> Testing >> Circuit/System Verification

Circuit/System Verification

  1. Verify that DTC P0651 is not set.
  2. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust .
  3. Verify that the engine is in good mechanical condition before continuing with this diagnostic. Refer to Symptoms - Engine Mechanical .
  4. Ignition OFF for 90 s, determine the current vehicle testing altitude.
  5. Ignition ON, observe the scan tool MAP Sensor parameters. Compare the parameter to the Altitude Versus Barometric Pressure . The BARO sensor pressure parameter should be within the specified range indicated in the table.
  6. Ignition ON, observe the scan tool MAP and BARO parameters. The MAP and BARO sensor parameters should be within 15 kPa (2 psi) of each other.
  7. Engine running, observe the scan tool MAP Sensor parameter. Slowly increase the engine speed to 2, 000 RPM by commanding the throttle valve to open. Then allow the engine speed to return to a stable idle. The MAP Sensor parameter should increment to a higher value at 2, 000 RPM and then return to near BARO at idle speed.
  8. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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