2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1234
* Engine speed
* Throttle opening
* Turbocharger boost pressure
* Intake air temperature (IAT)
* Barometric pressure (BARO)
* Efficiency of the charge air cooler
The sensor provides a signal voltage to the engine control module (ECM), relative to the pressure changes, on the boost pressure sensor signal
circuit. Under normal operation the greatest pressure that can exist in this portion of the induction system at ignition ON, engine OFF is equal to the
BARO. When the vehicle is operated at wide-open throttle (WOT) the turbocharger can increase the pressure to near 240 kPa (35 psi). The least
pressure that occurs is when the vehicle is idling or decelerating, and it is equal to the BARO.
Conditions for Running the DTCs
P0234
* The BARO is greater than 66 kPa (9.6 psi).
* The engine speed is between 2,000-3,720 RPM.
* The driver requested boost pressure level exceeds the level of the base boost pressure for more than 1 s.
* This DTC runs continuously within the enabling conditions.
P0299
* The BARO is greater than 66 kPa (9.6 psi).
* The engine speed is between 2,000-3,720 RPM.
* The driver requested boost pressure level exceeds the level of the base boost pressure for more than 6 s.
* This DTC runs continuously within the enabling conditions.
Conditions for Setting the DTC
P0234
The ECM detects that the actual boost pressure is 22-147 kPa (3.2-21.3 psi) greater than the desired boost pressure for greater than 1 s.
P0299
The ECM detects that the actual boost pressure is at least 27 kPa (3.9 psi) less than the desired boost pressure.
Action Taken When the DTC Sets
DTCs P0234 and P0299 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0234 and P0299 are Type B DTCs.
Diagnostic Aids
Use a solution of dish soap and water in a spray bottle to pinpoint any air leaks.
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 (See: Powertrain Management/Fuel Delivery and Air Induction/Turbocharger/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)
