A P0303 code on your 2020 Toyota 4Runner indicates that the engine control module has detected cylinder 3 misfires beyond acceptable parameters. This legendary off-road SUV features Toyota's proven V6 engine.
2020 4Runner Powertrain
The 2020 Toyota 4Runner uses a 4.0L V6 engine producing 270 horsepower. This naturally aspirated engine is known for exceptional reliability and off-road durability.
V6 Cylinder Configuration
In the 4.0L V6, cylinder 3 is located on one bank. With six cylinders, individual misfires are somewhat masked but still affect performance, especially under load.
Port Injection Technology
The 4.0L uses traditional port fuel injection, which helps prevent carbon buildup on intake valves. This design contributes to the engine's legendary longevity.
Off-Road Considerations
The 4Runner is built for challenging terrain. Dust, vibration, and extreme conditions can affect electrical connections. Inspect connectors during diagnosis.
Legendary Reliability
The 4Runner's V6 routinely exceeds 200,000+ miles. Address misfires to maintain this exceptional reliability.