When your 2024 Jeep Grand Wagoneer displays the P0305 code, the engine control module has detected repeated misfires in cylinder 5. The 2024 Grand Wagoneer uses V8 and inline-six engines, all with at least six cylinders. P0305 is a legitimate diagnostic code on all configurations.
2024 Grand Wagoneer Powertrain
The 2024 Grand Wagoneer offers the 6.4L Hemi V8 (471 hp) and the 3.0L twin-turbo Hurricane I-6 (510 hp or 420 hp depending on tune). Both engines have cylinder 5.
Cylinder 5 Location
On the 6.4L Hemi V8, cylinder 5 is on the driver side bank at the front position. On the Hurricane inline-six, cylinder 5 is toward the rear of the engine.
Common Causes
Spark plug degradation can occur with heavy use or towing. Ignition coil failure at cylinder 5 is possible. On the Hemi V8, MDS cylinder deactivation could affect specific cylinders. Fuel injector issues may cause lean misfires.
Diagnostic Process
Identify your engine configuration. Read all codes including MDS-related codes on V8 models. Inspect cylinder 5's spark plug and ignition coil. Verify fuel injector operation.