A P0303 code in your 2024 Jeep Grand Wagoneer indicates the engine control module has detected persistent misfires at cylinder 3. This premium full-size SUV offers the 6.4L Hemi V8 (471 horsepower) and the new 3.0L Hurricane twin-turbo inline-six (510 horsepower). Understanding your specific powertrain is essential for accurate diagnosis of this flagship vehicle.
Cylinder 3 Location by Engine
For the 6.4L Hemi V8, cylinder 3 is on one bank of the V-configuration. The 3.0L Hurricane is an inline-six, placing cylinder 3 third from the front of the engine. These different configurations affect diagnostic approach and component accessibility.
Engine Options
The 6.4L Hemi is a proven naturally aspirated V8 with MDS cylinder deactivation. The 3.0L Hurricane represents Stellantis's new twin-turbocharged inline-six technology, offering exceptional power and efficiency. Both engines power this luxury SUV with authority.
New Vehicle Misfire Scenarios
Even brand-new vehicles experience P0303 codes from manufacturing defects, fuel quality issues, or software calibration sensitivity. The new Hurricane engine may have first-year refinements addressed through TSBs.
Luxury Full-Size SUV Standards
The Grand Wagoneer represents Jeep's pinnacle of luxury. Any issues should be addressed promptly through authorized dealers to maintain the premium ownership experience.