What Does P0430 Mean on Your 2023 Nissan Murano?
Your 2023 Nissan Murano has set a P0430 trouble code, meaning the catalytic converter on Bank 2 is not converting exhaust pollutants efficiently enough. The 2023 Murano, the final model year of the current generation, uses a 3.5L V6 engine (VQ35DE) producing 260 horsepower with a CVT. Bank 2 is the rear bank of the V6, and the ECM has flagged reduced converter efficiency on that side.
At just 1-3 years old, the 2023 Murano is very unlikely to have a worn converter. Let's look at the more probable causes.
Symptoms You May Notice
- Check engine light on
- Slight fuel economy decrease
- Possible sulfur smell
- Minor power reduction
- Emissions test failure
Common Causes of P0430 on the 2023 Murano
- Faulty downstream O2 sensor — A malfunctioning sensor is the most likely cause on a newer vehicle.
- ECM software calibration — Software updates may be available that adjust catalyst monitoring.
- Exhaust leak — A minor connection or gasket issue.
- Catalytic converter defect — Manufacturing defects are rare but possible.
How to Diagnose the Problem
- Retrieve all DTCs
- Monitor O2 sensor live data
- Check for Nissan TSBs
- Inspect exhaust connections
- Verify ECM software version
Repair Options
- O2 sensor replacement: $140–$320. Likely warranty-covered.
- ECM software update: $0–$120. Warranty-covered.
- Exhaust repair: $100–$350.
- Catalytic converter: $800–$1,800. Warranty-covered.
Cost Breakdown
- Under warranty: $0
- Out-of-warranty: O2 sensor $140–$320, converter $800–$1,800
Your 2023 Murano should be covered under both the bumper-to-bumper warranty and the federal emissions warranty. Visit your Nissan dealer for a no-cost repair.
Prevention Tips
- Keep up with scheduled service
- Use quality fuel
- Don't ignore check engine lights
- Allow dealer software updates
- Follow the maintenance schedule