What P0430 Means on Your 2022 Chevrolet Silverado
The P0430 code on your 2022 Chevrolet Silverado indicates the engine control module has detected reduced catalytic converter efficiency on Bank 2. The 2022 Silverado offers the 5.3L L84 V8 (355 hp), 6.2L L87 V8 (420 hp), 2.7L L3B turbo four-cylinder (310 hp), and 3.0L Duramax diesel. On the V8 models, Bank 2 is the driver's side bank with cylinders 2, 4, 6, and 8.
At a few years old, the 2022 Silverado should still be under the federal emissions warranty. Sensor and software issues are more likely than converter failure at this age.
Symptoms You May Notice
- Check engine light on
- Slight fuel economy decrease
- Possible sulfur smell from exhaust
- Minor hesitation when towing
- Emissions test failure
Common Causes on the 2022 Silverado
- Faulty Downstream O2 Sensor — The most common cause on newer V8 trucks. Heat cycling under towing loads stresses sensors.
- PCM Software Issue — GM may have a calibration update for your engine's catalyst monitoring.
- Exhaust Leak — A gasket or connection issue on the Bank 2 exhaust.
- DFM/AFM Cylinder Deactivation Related — The cylinder deactivation system can affect exhaust flow and occasionally trigger false readings.
Diagnosis Steps
Check warranty status (8 years/80,000 miles for emissions). The 2022 Silverado should be covered through 2030. Take it to the Chevrolet dealer for free diagnosis. If checking yourself, scan all codes and monitor Bank 2 O2 sensors on live data.
Repair Options and Costs
- Warranty Repair — Cost: $0. Covered through 2030.
- O2 Sensor — Parts: $65 to $180. Labor: $85 to $170. Total: $150 to $350.
- Exhaust Leak Repair — Parts: $25 to $100. Labor: $100 to $280. Total: $125 to $380.
- Catalytic Converter (V8) — OEM: $850 to $2,100. Aftermarket: $350 to $850. Labor: $200 to $450.
DIY Feasibility
Under warranty, use the dealer. If out of warranty, the Silverado's generous ground clearance makes O2 sensor replacement a good DIY project. Converter work should be done at a shop due to the size and weight of V8 exhaust components.
Prevention Tips
- Follow GM's maintenance schedule for your specific engine
- Use quality fuel from name-brand stations
- Address misfires and check engine lights immediately
- Let the engine warm up before heavy towing
- Consider an AFM/DFM disabler if you experience related driveability issues (note: may affect warranty)