The 2022 Acura MDX fourth generation features the 3.5-liter V6 engine producing 290 horsepower in standard models and offers the Type S with a 3.0-liter turbocharged V6. Both V6 configurations include cylinder 5 as a legitimate position. A P0305 diagnostic trouble code indicates misfire detection at this cylinder.
Understanding P0305 on MDX
The P0305 code signifies "Cylinder 5 Misfire Detected." On Honda/Acura V6 engines, cylinder numbering places cylinder 5 on the rear bank. The MDX's V6 provides smooth power delivery for this three-row luxury SUV.
Standard vs Type S Engines
The standard 3.5L V6 uses port injection while the Type S's 3.0T uses direct injection. Both can experience cylinder 5 misfires, though causes may differ slightly. The Type S's turbocharging adds boost-related considerations.
Common Misfire Causes
Cylinder 5 misfires on the MDX typically result from ignition coil failure (a known Honda/Acura issue), spark plug wear, fuel injector malfunction, or on Type S models, potential carbon buildup from direct injection.
Diagnostic Approach
Honda/Acura HDS diagnostic equipment provides the most detailed cylinder-specific data. Accurate diagnosis ensures proper repair the first time.