2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1912
P2432 or P2433
* The ignition is ON, or the engine is operating.
* The DTCs run continuously when the above condition exists for greater than 1 s.
Conditions for Setting the DTC
P2431
* The ECM detects that the secondary air injection pressure sensor is 5 kPa (0.7 psi) less than the BARO sensor when the secondary air
injection pump is commanded ON.
OR
* The ECM detects that the secondary air injection pressure sensor is 5 kPa (0.7 psi) greater than the BARO sensor when the secondary air
injection pump is commanded OFF.
P2432
The ECM detects that the secondary air injection pressure sensor signal is less than 0.5 V for greater than 1 s.
P2433
The ECM detects that the secondary air injection pressure sensor signal is greater than 4.5 V for greater than 1 s.
Action Taken When the DTC Sets
DTCs P2431, P2432 and P2433 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P2431, P2432 and P2433 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Secondary Air Injection System Description (See: Powertrain Management/Emission Control Systems/Air Injection/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, observe the diagnostic trouble code (DTC) information with a scan tool. Verify that DTCs P0641, P0642, P0643, P2227,
P2228, or P2229 are not set.
瀚慖f any of the above DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for further diagnosis.
2. Observe the scan tool Secondary Air Injection Pressure Sensor voltage parameter. The reading should be between 1.0-4.0 V.
3. Compare the scan tool BARO pressure parameter to the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and
