When your 2023 Mazda CX-9 displays diagnostic trouble code P0306, indicating a cylinder 6 misfire, this code requires special investigation. The 2023 CX-9 (final model year) uses a four-cylinder turbocharged engine, meaning there is no sixth cylinder to experience a misfire.
2023 CX-9 Final Year
The 2023 Mazda CX-9 was the final model year before being replaced by the CX-90. It continued with the Skyactiv-G 2.5-liter turbocharged four-cylinder engine producing up to 250 horsepower. The engine has only four cylinders.
Understanding P0306
P0306 identifies cylinder 6 as the misfire source, but the CX-9 only has cylinders 1-4. This code indicates diagnostic system malfunction rather than actual engine problems.
Diagnostic Steps
Verify with Mazda IDS diagnostics. Remove OBD-II accessories. If symptoms exist, diagnose the four actual cylinders.