A P0302 trouble code on your 2019 Toyota RAV4 means the engine control module detected repeated misfires in cylinder 2. The 2019 model year introduced the redesigned RAV4 with the 2.5L Dynamic Force engine, which may experience misfire issues from several common causes.
The 2019 RAV4 Engine System
The 2019 RAV4's A25A-FKS engine features 13:1 compression, dual injection (D-4S), and variable valve timing. This efficient design is generally reliable but requires quality maintenance. At 5+ years old, wear items may contribute to misfire conditions.
Most Likely P0302 Causes
For a 2019 RAV4 with accumulated miles, common cylinder 2 misfire causes include ignition coil wear or failure, spark plugs approaching replacement interval, fuel injector issues from carbon or debris, intake valve carbon deposits, and vacuum leaks from aged gaskets or hoses.
Age-Appropriate Diagnosis
Given the vehicle's age, start by checking maintenance records. Spark plugs may be due for replacement if original (120,000-mile interval). Inspect the ignition coil for signs of heat damage or corrosion. The swap test remains the most effective way to isolate ignition components.
Preventive Approach
When addressing a single-cylinder misfire on a vehicle this age, consider replacing all spark plugs and inspecting all ignition coils. This preventive approach is cost-effective compared to repeated repairs as other cylinders develop similar issues.