2010 Cadillac Truck SRX FWD V6-3.0L Page 1323
threshold.
P0237
The ECM detects that the boost pressure sensor voltage is less than 0.45 V or the measured pressure is less than 50 kPa (7.3 psi).
P0238
The ECM detects that the boost pressure sensor voltage is greater than 4.65 V or the measured pressure is greater than 300 kPa (43.5 psi).
Action Taken When the DTC Sets
DTCs P0236, P0237, P0238, are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0236, P0237, P0238, are Type B DTCs.
Diagnostic Aids
* Use a solution of dish soap and water in a spray bottle to pinpoint any air leaks.
* The BARO sensor is integrated within the ECM, and it has a port on the housing that allows it to sense the ambient pressure. Any restriction
at this opening may hinder the operation of the BARO sensor.
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
Turbocharger System Description ()
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. Compare the scan tool BARO parameter to the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control
Systems/Specifications/Altitude Versus Barometric Pressure) table. The BARO should be within the specified range displayed in the table for
the specific altitude.
瀚慖f not within the specified range, refer to DTC P2227, P2228, or P2229 (LAU) (See: P Code Charts/P2227) for further diagnosis.
3. 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.
