When your 2023 Jeep Gladiator displays diagnostic trouble code P0306, the engine control module has detected repeated misfires in cylinder 6. The Gladiator's standard 3.6-liter Pentastar V6 engine has six cylinders, making this a valid diagnostic code requiring systematic troubleshooting.
2023 Gladiator Powertrain
The 2023 Jeep Gladiator continues with the 3.6-liter Pentastar V6 producing 285 horsepower and 260 lb-ft of torque. This proven engine uses a coil-on-plug ignition system with cylinder 6 located on the rear passenger-side bank. The truck's midsize design provides reasonable access to engine components.
Misfire Causes and Diagnosis
Ignition coil degradation is the primary cause of cylinder-specific misfires. Heat cycling causes internal failures that produce intermittent misfiring, often worse when the engine is heat-soaked. Spark plug wear is another frequent cause, particularly approaching or past service intervals.
Fuel system issues including injector problems or fuel quality can contribute to misfires. The Gladiator's truck application may see additional stress from towing or payload that accelerates component wear patterns.