If your 2016 Toyota Camry displays a P0305 code, diagnosis depends on your engine configuration. The 2016 Camry was available with four-cylinder or V6 engines. P0305 only applies to V6 models.
V6 Camry: Understanding P0305
In the 3.5L V6, cylinder 5 is on the rear of the left bank. At this age and likely mileage, ignition component wear is expected. Consider comprehensive ignition system service.
Age-Related Considerations
On a vehicle of this age, inspect all ignition components. If one is failing, others may be close behind. Sensor degradation can also cause erroneous codes.
Diagnostic Approach
Confirm your engine type. For V6: comprehensive ignition system inspection. For 4-cylinder: P0305 is anomalous—investigate sensors and wiring.