The P0303 diagnostic code on your 2022 Toyota 4Runner indicates that the engine control module has detected cylinder 3 misfires exceeding acceptable thresholds. This iconic off-road SUV deserves proper diagnostic attention.
2022 4Runner Powertrain
The 2022 Toyota 4Runner continues with the proven 4.0L V6 producing 270 horsepower. This naturally aspirated engine remains unchanged due to its exceptional reliability record.
V6 Engine Technology
The 4.0L V6 uses dual overhead cams and port fuel injection. This traditional design avoids the carbon buildup common in direct injection engines while providing smooth, reliable power.
Cylinder 3 Location
In the V6 configuration, cylinder 3 is on one bank. Bank-specific fuel trim data helps determine if the issue is isolated to cylinder 3 or part of a bank-wide problem.
Off-Road SUV Considerations
The 4Runner excels in harsh conditions. Off-road use exposes components to dust, vibration, and moisture that can affect connections and components over time.
Toyota Reliability
The 4Runner's V6 is renowned for durability. Address misfires promptly to maintain its legendary reliability.