When your 2018 Ram 1500 displays diagnostic trouble code P0306, the engine control module has detected misfires in cylinder 6. The 2018 Ram 1500 offers V6 and V8 engines, making P0306 a valid code on both engine types.
2018 Ram 1500 Engines
The 2018 Ram 1500 was available with the 3.6-liter Pentastar V6 and 5.7-liter HEMI V8. Both engines have six or more cylinders with cylinder 6 in different locations. 2018 was the final year of the previous-generation Ram 1500.
Age and Mileage Considerations
At 2018 model age, wear-related issues become more relevant. Spark plugs may be past service interval, ignition coils may have degraded, and the HEMI's MDS system may show age-related problems.
Common Causes
Ignition coil failure, worn spark plugs, MDS lifter issues on V8, and fuel injector problems are typical at this age.