Sunday, April 25, 2021

2010 Cadillac CTS Sedan AWD V6-3.6L Page 790

2010 Cadillac CTS Sedan AWD V6-3.6L Page 790



* The engine is not running.



* The DTC runs once for each engine start.



Conditions for Setting the DTC



P0089



The high pressure fuel pump actuator command necessary to maintain the desired fuel rail pressure is +/-2.5 MPa (363 psi) of the command



expected by the controller. The condition exists for greater than 5 s.



P00C6



The ECM detects that the fuel pressure is not rising or has fallen beyond acceptable limits during engine cranking.



P228C



The actual fuel rail pressure is 1.5 MPa (218 psi) less than the desired fuel pressure. The condition exists for greater than 5 s.



P228D



The actual fuel rail pressure is 3.6 MPa (522 psi) greater than the desired fuel rail pressure. The condition exists for greater than 5 s.



Action Taken When the DTC Sets



* DTCs P0089 and P00C6 are Type B DTCs.



* DTCs P228C and P228D are Type A DTCs.



* A message center or an indicator displays Reduced Engine Power.



Conditions for Clearing the DTC



* DTCs P0089 and P00C6 are Type B DTCs.



* DTCs P228C and P228D are Type A DTCs.



Diagnostic Aids



* A condition with the fuel tank fuel pump module or fuel pump flow control module may set these DTCs.



* A skewed fuel rail pressure sensor, or an intermittent condition in the fuel rail pressure sensor circuits may set these DTCs.



* A leaking or restricted fuel injector may set DTC P0089.



* A short to voltage in the crankshaft position signal circuit may set a DTC.



* A short to voltage in the camshaft position actuator solenoid valve control circuit may set a DTC.



Reference Information



Schematic Reference



Engine Controls Schematics (LLT) (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)



Description and Operation



Fuel System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Fuel System Description)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit



Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/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

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