2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1859
* Before the ECM can report DTC P2227 failed, DTCs P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0114, P0121, P0122, P0123,
P0221, P0222, P0223, P0236, P0237, P0238, P2228, and P2229 must run and pass.
* The engine is operating.
* The engine speed is less than 1,120 RPM.
* The throttle position sensor parameter is less than 10 %.
* DTC P2227 runs whenever the above conditions are met.
P2228 or P2229
* The ignition is ON.
* The DTCs run continuously when the above condition is met for 0.2 s.
Conditions for Setting the DTC
P2227
* The ECM detects that the BARO sensor signal plus a calibrated threshold is less than the boost pressure sensor signal plus a calibrated
threshold for more than 9 s.
OR
* The ECM detects that the BARO sensor signal plus a calibrated threshold greater than the boost pressure sensor signal plus a calibrated
threshold for more than 9 s.
OR
* The ECM detects that the BARO pressure changed greater than 5 kPa (0.7 psi) within 20 s.
OR
* The ECM detects that the BARO pressure changed greater than 10 kPa (1.5 psi) since the last ignition cycle.
P2228
* The ECM detects that the BARO sensor voltage is less than 0.20 V for 0.5 s.
OR
* The ECM detects that the BARO sensor signal is less than 45 kPa (6.5 psi) for 2 s
P2229
* The ECM detects that the BARO sensor voltage is greater than 4.8 V for 0.5 s.
OR
* The ECM detects that the BARO sensor signal is greater than 115 kPa (16.7 psi) for 2 s.
Action Taken When the DTC Sets
DTCs P2227, P2228, and P2229 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P2227, P2228, and P2229 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)
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. Start the engine. Observe the DTC information with a scan tool. DTCs P2227, P2228, or P2229 should not set.
2. 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.
Circuit/System Testing
1. Inspect the atmospheric vent on the K20 ECM case for one of the following conditions:
* Moisture in the vent inlet
* Debris in the vent inlet
