The 2022 Cadillac XT6 delivers three-row luxury crossover capability with choice of refined powertrains. When your XT6 displays a P0304 code indicating a cylinder 4 misfire, understanding your engine configuration helps target accurate diagnosis.
Understanding P0304 in the XT6
The 2022 XT6 offers the 2.0L turbocharged four-cylinder or 3.6L V6. For the four-cylinder, cylinder 4 is at the rear of the engine. For the V6, cylinder 4 is on the rear of the left bank. Both use individual coil-on-plug ignition.
Engine-Specific Considerations
The 2.0L turbo operates under higher combustion pressures, stressing ignition components. The 3.6L V6 has proven reliability across many GM applications. Both engines use direct injection technology.
Diagnostic Approach
Identify your engine and access cylinder 4 accordingly. Inspect spark plug condition. On turbo models, check for boost leaks. Verify no vacuum leaks exist in the intake system.
Resolution Process
Replace spark plugs with AC Delco specifications. Test ignition coil output. If carbon buildup is suspected, intake valve cleaning may be warranted.