P0175 on the 2024 Nissan Frontier: What to Know
The 2024 Nissan Frontier continues with the VQ38DD 3.8L direct-injection V6 producing 310 hp and 281 lb-ft of torque, paired with a 9-speed automatic transmission. Bank 2 on this V6 is the front cylinder bank (cylinders 1, 3, 5). A P0175 code indicates the ECM has found that Bank 2 is running persistently rich. On a relatively new vehicle like a 2024 model, this code is uncommon but not impossible.
Warning Signs
- Check engine light illuminated
- Fuel economy lower than the expected 18-24 MPG
- Subtle rough idle or vibration
- Dark exhaust residue at the tailpipe
- Reduced power during acceleration or under load
- Faint fuel odor from exhaust
Most Likely Causes
1. MAF Sensor Contamination (High Likelihood)
Even on a new truck, the MAF sensor can get dirty quickly if the Frontier is used off-road, on unpaved roads, or in dusty work environments. The VQ38DD's large-volume air intake draws significant amounts of air, and any fine dust or PCV oil vapor that reaches the hot-wire element causes underreporting of airflow. The ECM then delivers too much fuel relative to the actual air entering the engine. This is the first thing to check and the cheapest to address.
2. Software Calibration Issue (Medium Likelihood)
New model years sometimes have ECM calibration imperfections that Nissan corrects through technical service bulletins (TSBs). A fuel trim calibration issue can cause false or premature P0175 codes. Check with your Nissan dealer for any available software updates. This would be a free warranty repair if applicable.
3. Early O2 Sensor Failure (Medium Likelihood)
While uncommon on a new vehicle, the Bank 2 upstream wideband O2 sensor can fail prematurely due to manufacturing defects or exposure to contaminated fuel. The sensor provides the primary feedback for fuel mixture control, and any bias in its reading directly affects fuel delivery. Warranty coverage applies for any premature sensor failure on a 2024 model.
4. Direct Injector Seal Issue (Low Likelihood)
The VQ38DD's high-pressure direct injectors operate at extremely high pressures. Occasionally, an injector may have a manufacturing defect in its seal or solenoid that allows minor fuel leakage. On a truck with minimal mileage, this would be a manufacturing defect covered under warranty. An injector balance test at the dealer can identify any problematic injectors.
Warranty Information
The 2024 Frontier is covered by Nissan's comprehensive warranty: 3-year/36,000-mile bumper-to-bumper, 5-year/60,000-mile powertrain, and 8-year/80,000-mile federal emissions warranty. All components that could cause P0175 are covered. Take the truck to a Nissan dealer for no-cost diagnosis and repair.
Diagnostic Approach
- Visit a Nissan dealer for warranty diagnosis if mileage and time are within coverage.
- If DIY diagnosing, scan all codes and check for TSBs.
- Monitor Bank 2 STFT and LTFT data.
- Clean the MAF sensor if visibly contaminated.
- Request dealer check for ECM software updates.
- Have the dealer test the Bank 2 O2 sensor and fuel injectors if needed.
Cost Estimates (If Out of Warranty)
MAF cleaning: $10-$15. MAF replacement: $140-$300. ECM software update: $100-$200 at dealer. O2 sensor: $200-$400. Fuel injector: $300-$550 each. Most 2024 models should have full warranty coverage for these repairs.