A P0420 diagnostic code on your 2024 Toyota 4Runner indicates that the catalytic converter efficiency has dropped below acceptable thresholds. The completely redesigned 2024 4Runner features new turbocharged engines.
2024 4Runner Engine Options
- 2.4L Turbo 4-cylinder: 278 hp (base engine)
- 2.4L Turbo 4-cylinder Hybrid (i-FORCE MAX): 326 hp combined
The new 4Runner switches from V6 to turbocharged 4-cylinder engines with single exhaust banks.
P0420 on a New Vehicle
A 2024 4Runner showing P0420 is unusual since converters rarely fail this early:
- O2 Sensor Issues: More likely than converter failure
- New Platform: May have software/calibration needs
- Manufacturing Variation: Rare defects possible
Warranty Coverage
A 2024 4Runner is fully covered under warranty.