P0430 on Your 2024 Jeep Grand Wagoneer
A P0430 code on your 2024 Jeep Grand Wagoneer means the Bank 2 catalytic converter has fallen below its efficiency threshold. The 2024 Grand Wagoneer is available with the new 3.0L Hurricane twin-turbo inline-6 (510 hp standard, 420 hp in the base S/O configuration) replacing the previous HEMI V8. On the inline-6, Bank 2 refers to the secondary catalyst section. The downstream O2 sensor is reporting reduced converter efficiency.
On a brand-new 2024 flagship luxury SUV, this is a warranty issue that Jeep should address at no cost.
Symptoms
- Check engine light on (steady)
- Possible slight fuel economy decrease
- Faint exhaust odor possible
- No significant drivability changes
- Would fail emissions test
Why a New Grand Wagoneer Gets This Code
- O2 Sensor Defect — The new Hurricane engine's exhaust system may have sensors with manufacturing defects.
- Catalytic Converter Defect — New engine platforms sometimes have early converter issues.
- ECM Software Issue — The Hurricane engine's calibration may need updating for catalyst monitoring.
- Turbo System Exhaust Issue — The twin-turbo setup's complex exhaust routing may have connection or gasket issues.
Diagnostic Steps
- Dealer visit immediately. This is a premium luxury vehicle under full warranty.
- TSB and recall check. The Hurricane engine is new — there may be service bulletins being issued.
- Factory diagnostics. Stellantis dealer tools are essential for the new engine platform.
- Full documentation. Keep all records for this premium vehicle.
Repair Costs (Reference — Should Be Warranty-Covered)
- Catalytic Converter: $1,500 - $3,500. Premium luxury pricing. Warranty-covered.
- Downstream O2 Sensor: $180 - $450. Also warranty-covered.
- ECM Software Update: $0 under warranty.
- Turbo Exhaust Repair: $0 - $300 under warranty.
Full warranty coverage on the 2024 Grand Wagoneer: Jeep's 3-year/36,000-mile basic warranty, 5-year/60,000-mile powertrain warranty, and federal emissions warranty (8 years/80,000 miles).
Always Use the Dealer
The Grand Wagoneer is Jeep's $80,000+ flagship. There is absolutely no reason to attempt DIY repairs on a new vehicle with full warranty coverage. Let Jeep's premium service team handle it.
Prevention Tips
- Follow the premium maintenance schedule for the Hurricane engine
- Use quality fuel — the twin-turbo engine benefits from premium
- If towing, stay within rated capacity and follow cooldown procedures
- Report any warning lights immediately
- Stay current on software updates and dealer service campaigns