2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1173

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1173

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Turbocharger Pressure Sensor Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Turbocharger/Service and

Repair/Turbocharger Pressure Sensor Replacement) for intake air pressure and temperature sensor replacement.

* Turbocharger Removal (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/20. Turbocharger Removal)

* Turbocharger Disassemble (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/101. Turbocharger Disassemble)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0236

DTC P0236, P0237, or P0238

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0236

- Turbocharger Boost System Performance

DTC P0237

- Turbocharger Boost Sensor Circuit Low Voltage

DTC P0238

- Turbocharger Boost Sensor Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit Description

The boost pressure sensor is integrated with the intake air temperature (IAT) sensor. The boost pressure sensor measures the range of pressures

between the turbocharger and the throttle body. Pressure in this portion of the induction system is affected by the following:

* Engine speed

* Throttle opening

* Turbocharger boost pressure