The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
Action Taken When the DTC Sets
* DTC P3401, P3425, P3441, and P3449 are Type B DTCs.
* The engine will return to V8 mode.
* The fuel injector will turn OFF for the cylinder that has a cylinder deactivation DTC set, resulting in an engine misfire.
Conditions for Clearing the DTC
DTC P3401, P3425, P3441, and P3449 are Type B DTCs.
Diagnostic Aids
The valve lifter oil manifold solenoids are assigned to the following engine cylinders:
* Solenoid #1 = Cylinder #1
* Solenoid #2 = Cylinder #4
* Solenoid #3 = Cylinder #6
* Solenoid #4 = Cylinder #7
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Cylinder Deactivation (Active Fuel Management) System Description (See: Powertrain Management/Computers and Control Systems/Description
and Operation/Cylinder Deactivation (Active Fuel Management) 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
Special Tools
EN-46999 Displacement On Demand Tester
For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).
Circuit/System Verification
Note: DTC P3401, P3425, P3441, and P3449 sets with an open ignition circuit fuse.
1. Ignition ON, command the appropriate cylinder deactivation solenoid ON and OFF while observing the following status parameters with a
scan tool:
* Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Open Test Status
* Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Short Gnd Test Status
* Cyl. 1, 4, 6, or 7 Deact. Sol. Ckt Short Volts Test Status
Each parameter should display OK or Not Run
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
