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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 2.4L - DTC P0628 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2430, P2431, P2435, or P2436: Secondary Air Injection System Pressure Sensor Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
    NOTE:

    Verify the battery is fully charged before proceeding with this diagnostic procedure. The secondary air injection pump output will vary with system voltage.

  1. Ignition ON
  2. Verify that DTC P0411, P0412, P0418, P2432, P2433, P2237, P2238, P2440, or P2444 is not set.
    • If none of the DTCs are set. 
  3. Verify the scan tool BARO pressure parameter is within the range specified in the Altitude Versus Barometric Pressure table.
    • If not within the specified range 

      Refer to DTC P0106 for further diagnosis.

    • If within the specified range 
    4. NOTE:

    To prevent the secondary air injection pump from overheating, do not operate the pump consecutively for greater than 2 minutes. The pump is provided with a thermal protector that will automatically reset when allowed to cool. Engine coolant temperature must be greater than 5°C (41°F) to enable scan tool device control.

  4. Verify the secondary air injection pump turns ON and OFF when commanding the Secondary Air Injection Pump Relay between ON and OFF with a scan tool.
    • If the secondary air injection pump does not operate as specified 

      Refer to Circuit/System Testing-Secondary Air Injection Pump Malfunction

    • If the secondary air injection pump operates as specified 
  5. Verify the scan tool Secondary Air Injection Pressure Sensor Bank 1, Bank 2 and the BARO pressure parameters are within 3 kPa (0.4 psi).
    • If not within the specified range 

      Refer to Circuit/System Testing-Secondary Air Injection System Pressure Not In Range.

    • If within the specified range 
  6. Engine running
  7. Verify the scan tool Secondary Air Injection Pressure Sensor Bank 1 and Bank 2 parameters increase between 14-22 kPa (2.0-3.2 psi), greater than BARO, when the Secondary Air Injection Pump Relay is commanded ON with a scan tool.
    • If not within the specified range 

      Refer to Circuit/System Testing-Secondary Air Injection System Pressure Not In Range.

    • If within the specified range 
  8. Verify the scan tool Secondary Air Injection Pressure Sensor Bank 1 and Bank 2 parameters increase between 5-11 kPa (0.7-1.6 psi), greater than BARO, when the Secondary Air Injection System is commanded ON with a scan tool.
    • If not within the specified range 

      Refer to Circuit/System Testing-Secondary Air Injection System Pressure Not In Range.

    • If within the specified range 
  9. 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.
  10. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing

    • If the DTC does not set 
  11. All OK
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