When your 2022 Jeep Grand Cherokee displays the P0305 code, the engine control module has detected repeated misfires in cylinder 5. The redesigned WL-generation 2022 Grand Cherokee offers V6, V8, and 4xe hybrid options. P0305 is valid on V6/V8 but anomalous on the 4xe.
2022 Grand Cherokee Engine Options
The redesigned 2022 Grand Cherokee offers the 3.6L Pentastar V6 (293 hp), 5.7L Hemi V8 (357 hp), and 4xe plug-in hybrid (375 hp) using a 2.0L turbo four-cylinder. Only the V6 and V8 have a cylinder 5.
V6/V8 Cylinder 5 Location
On the 3.6L V6, cylinder 5 is on the driver side bank toward the rear. On the 5.7L V8, cylinder 5 is on the driver side bank at the front. Stellantis positions odd-numbered cylinders on the driver side.
Common Causes
On a relatively new 2022 model, manufacturing defects or loose connections are possible. Ignition coil failure can occur. Check for TSBs. Spark plug issues are less likely unless mileage is high.
Diagnostic Process
Verify your engine. On V6/V8, check cylinder 5 components. On 4xe, investigate ECM errors. First-year redesign—check for TSBs.