What Does P0430 Mean on Your 2022 Nissan Maxima?
Your 2022 Nissan Maxima has set a P0430 code, meaning the catalytic converter on Bank 2 is not efficiently cleaning exhaust gases. The 2022 Maxima is powered by a 3.5L V6 (VQ35DE) producing 300 horsepower with a CVT transmission. Bank 2 is the rear bank of the V6 closest to the firewall. The 2022 model year is the second-to-last year for the Maxima nameplate.
At just 2-4 years old, the 2022 Maxima is unlikely to have a worn converter. Sensor or software issues are the most probable causes.
Symptoms You May Notice
- Check engine light on
- Mild fuel economy decrease
- Possible sulfur smell
- Slight reduction in acceleration
- Emissions test failure
Common Causes of P0430 on the 2022 Maxima
- Faulty downstream O2 sensor — A malfunctioning rear oxygen sensor on Bank 2 is a top suspect on a newer vehicle.
- ECM software calibration — Nissan may have calibration updates that address false P0430 triggers.
- Exhaust leak — Even on newer vehicles, connections can develop minor leaks.
- Catalytic converter defect — Manufacturing defects are uncommon but possible.
How to Diagnose the Problem
- Retrieve all DTCs and freeze frame data
- Monitor Bank 2 O2 sensor live data
- Check for Nissan TSBs for the 2022 Maxima
- Inspect exhaust system for leaks
- Verify ECM software is current
Repair Options
- O2 sensor replacement: $150–$340.
- ECM software update: $0–$120.
- Exhaust leak repair: $100–$350.
- Catalytic converter replacement: $900–$2,000.
Cost Breakdown
- Under warranty: $0 for most repairs
- Out-of-warranty: O2 sensor $150–$340, converter $900–$2,000
Your 2022 Maxima should be covered under the federal emissions warranty (8 years/80,000 miles) and may still be within bumper-to-bumper coverage. Visit your Nissan dealer to take advantage of warranty repairs.
Prevention Tips
- Use premium fuel as recommended for the 3.5L V6
- Keep up with maintenance schedule
- Don't ignore check engine lights
- Allow dealer software updates
- Have the exhaust inspected during regular service