A P0268 code on your 2022 Cadillac CT5 indicates a high voltage condition in the cylinder 3 fuel injector circuit. The CT5's turbocharged engines demand proper injector operation for the luxury performance Cadillac owners expect.
CT5 Engine Options
The 2022 CT5 offers the 2.0L turbo four-cylinder (CT5 Luxury/Premium Luxury) or the 3.0L twin-turbo V6 (CT5-V). Both engines use direct fuel injection. Cylinder 3 location differs between the four-cylinder and V6—consult the service manual for your specific engine.
High Circuit Analysis
High voltage in an injector circuit indicates an open condition—the circuit isn't completing because of a disconnection, broken wire, or failed-open injector coil. Without current flow, the ECM sees the reference voltage without the expected drop from injector operation.
Diagnostic Process
Verify the cylinder 3 injector connector is properly connected—direct injection connectors can be tight and may not fully seat during service. Measure injector coil resistance; infinite ohms indicates an open coil. Test wiring continuity from connector to ECM. On turbocharged engines, check for heat-related wire damage.
Repair Approach
Direct injection injector replacement on the CT5 requires fuel system depressurization and fuel rail removal. These high-pressure injectors require precise installation. If wiring is at fault, repair using GM-approved procedures. Given the vehicle's luxury status, dealer service may be preferred for proper diagnostics and repair.