The 2022 Nissan Altima features 4-cylinder engines exclusively—the 2.5L inline-4 or innovative 2.0L VC-Turbo. Both contain only cylinders 1 through 4. When P0306: Cylinder 6 Misfire Detected displays, you're facing an anomalous code.
Current Generation 4-Cylinder Only
The sixth-generation Altima (2019+) eliminated V6 options entirely. All current Altimas, including the 2022 model, use 4-cylinder powertrains. P0306 cannot indicate an actual misfire since cylinder 6 doesn't exist.
Sources of Erroneous P0306
Generic scanners may misinterpret Nissan's diagnostic protocols. Scanner databases designed for older V6 Altimas may produce inappropriate codes. Aftermarket OBD devices can interfere with CVT and engine communications. ECU communication errors generate false cylinder-specific codes.
Diagnostic Protocol
Clear all codes and monitor for recurrence during normal driving. Use Nissan CONSULT or professional equipment for accurate readings. Inspect the OBD-II port for issues. Remove aftermarket devices temporarily. Check for valid misfire codes (P0301-P0304) if drivability concerns exist.
CVT Transmission Note
The Altima's CVT transmission affects how the engine operates during acceleration. Ensure any diagnostic concerns account for CVT-specific behaviors that may feel unusual but are normal for this transmission type.