FixVault
Home › Buick › 2011 › Regal CXL › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.4L - DTC P0300 Through DTC P0650 › DTC P0411 › Circuit/System Verification

Circuit/System Verification

    NOTE: Verify the battery is fully charged before proceeding with this diagnostic procedure. The Air Pump output will vary with system voltage.
  1. Ignition ON, observe the DTC information with a scan tool. Verify that DTCs P0412, P0418, P2430, P2431, P2432, P2433, P2440, or P2444 are not set.
  2. Compare the scan tool BARO pressure parameter to the Altitude Versus Barometric Pressure table. The BARO pressure should be within the specified range displayed in the table for the specific altitude.
    • If not within the specified range, refer to DTC P0106 for further diagnosis.
  3. Compare the scan tool Air Pressure Sensor pressure parameter to the BARO pressure parameter. The parameters should be within 3 kPa (0.4 psi).
  4. Command the Secondary Air Injection Solenoid Valve Open and Closed with a scan tool. Listen or feel for Solenoid Valve operation. The Solenoid Valve should respond to the scan tool commands. Repeat as necessary in order to verify Air Solenoid Valve operation.
  5. Engine idling, command the Secondary Air Injection Pump Relay ON with a scan tool while observing the Secondary Air Injection Pressure Sensor parameter. The reading should change greater than 15 kPa (2.2 psi).
  6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
About FixVault