What Does P0171 Mean on a 2024 Nissan Frontier?
A P0171 code on your 2024 Nissan Frontier means the engine control module detected a lean air-fuel mixture on Bank 1. The 2024 Frontier continues with the 3.8L V6 engine (VQ38DD) producing 310 horsepower paired with a 9-speed automatic transmission. On this V6, Bank 1 is one of the two cylinder banks. A lean condition means the air-fuel ratio is too far on the air-heavy side.
Your 2024 Frontier is under full warranty. Your Nissan dealer should diagnose and repair this code at no charge.
Symptoms You Might Notice
- Check engine light on
- Rough idle
- Hesitation when accelerating
- Reduced fuel economy
- Reduced towing power
- Possible misfires on Bank 1
Common Causes of P0171 on the 2024 Nissan Frontier
- Intake or Vacuum Leak (30% likelihood) - A loose factory connection or improperly seated gasket can allow unmetered air into the intake.
- MAF Sensor Issue (25% likelihood) - Contamination or factory defect in the mass airflow sensor.
- ECM Software Calibration (25% likelihood) - Nissan may have released fuel trim calibration updates for the 2024 model.
- Fuel System Component (20% likelihood) - Factory defect in the fuel pump, injector, or pressure sensor.
How to Diagnose the Problem
- Visit your Nissan dealer - Full warranty means free diagnosis and repair.
- Ask about TSBs - Check for applicable service bulletins.
- Scan for codes - Note companion codes for context.
- Visual inspection - Look for loose intake connections.
Repair Options and Cost Breakdown
- Warranty repair - $0. Full coverage.
- Intake repair - $100 to $400 if out of warranty.
- MAF sensor service - $50 to $280.
- ECM update - $0 to $150.
- Fuel system repair - $400 to $800.
Can You DIY This Repair?
Under warranty, let the dealer handle it. No financial benefit to DIY work on a warrantied vehicle.
Prevention Tips
- Keep scheduled service appointments
- Use Top Tier gasoline
- Change air filters more often if driving in dusty conditions
- Use OEM air filters
- Report performance changes promptly