The P0302 code on your 2020 Toyota Tundra indicates the engine control module has detected misfires in cylinder 2. The Tundra's 5.7L 3UR-FE V8 engine is known for reliability, but individual cylinder misfires can occur from component wear or failure.
Tundra V8 Cylinder Layout
The 5.7L V8 uses conventional cylinder numbering with 1-3-5-7 on the driver side and 2-4-6-8 on the passenger side. Cylinder 2 is the front-most cylinder on the passenger bank, making it accessible for diagnosis without extensive disassembly.
Common P0302 Causes on the 5.7L
At 4+ years old, the 2020 Tundra may experience misfire from worn spark plugs approaching service interval, ignition coil degradation from heat cycling, fuel injector issues, or less commonly, vacuum leaks or mechanical problems. The V8's proven design rarely has systemic issues.
V8-Specific Diagnosis
The coil-on-plug design allows easy swap testing. Move the cylinder 2 coil to cylinder 4 and see if the misfire follows. The 5.7L uses iridium spark plugs with 120,000-mile intervals, but hard use may warrant earlier replacement.
Truck Duty Considerations
Tundras used for towing experience higher thermal loads on ignition components. If your Tundra regularly tows heavy loads, ignition components may wear faster than average. Consider the truck's usage when evaluating component condition.