Understanding P0430 on Your 2022 Toyota 4Runner
The P0430 code on your 2022 Toyota 4Runner means the powertrain control module has detected that the Bank 2 catalytic converter is not converting exhaust pollutants efficiently enough. The 2022 4Runner continues with the time-tested 4.0L 1GR-FE V6 engine making 270 horsepower. Bank 2 on this V6 is the cylinder bank with cylinders 2, 4, and 6.
At just a few years old, a genuine catalytic converter failure is unlikely unless the 4Runner has been heavily used for off-roading or towing. Sensor issues and minor exhaust problems are more probable, and the vehicle should still be under warranty.
Symptoms You May Notice
- Check engine light illuminated
- Slight fuel economy decrease
- Possible sulfur smell from exhaust
- Minor hesitation under acceleration
- Emissions test failure
Common Causes on the 2022 4Runner
- Faulty Downstream O2 Sensor — The Bank 2 Sensor 2 may have a defect or have been contaminated by off-road conditions like dust and water.
- Exhaust Leak or Damage — Common if the 4Runner has been on trails. Rock strikes, loose skid plates, or damaged exhaust hangers can cause leaks.
- ECU Software Issue — Some 4Runners benefit from a calibration update to adjust catalyst monitoring thresholds.
- Catalytic Converter Issue — Less likely at this age, but possible if the truck has experienced severe-duty use.
Diagnosis Steps
The 2022 4Runner should be under the federal emissions warranty (8 years/80,000 miles). Take it to the dealer for free diagnosis and repair. If you want to pre-check, scan for all codes and monitor the Bank 2 downstream O2 sensor on live data. Inspect underneath for obvious exhaust damage.
Repair Options and Costs
- Warranty Repair — Cost: $0. The 2022 model is within warranty through 2030.
- O2 Sensor (out of warranty) — Parts: $60 to $165. Labor: $85 to $165. Total: $145 to $330.
- Exhaust Leak Repair — Parts: $25 to $100. Labor: $100 to $275. Total: $125 to $375.
- Catalytic Converter (V6) — OEM: $800 to $1,600. Aftermarket: $350 to $750. Labor: $180 to $380.
DIY Feasibility
Under warranty, go to the dealer. If out of warranty, the 4Runner's body-on-frame design provides excellent access for exhaust work. O2 sensor replacement is a straightforward DIY job. Converter replacement requires a shop.
Prevention Tips
- Inspect the exhaust after off-road adventures
- Follow the severe-duty maintenance schedule if you off-road regularly
- Keep the air filter clean, especially in dusty conditions
- Address misfires immediately to protect the converter
- Use quality fuel from reputable stations