What Does P0171 Mean on a 2024 Nissan Pathfinder?
A P0171 code on your 2024 Nissan Pathfinder means the engine control module detected a lean air-fuel mixture on Bank 1. The 2024 Pathfinder continues with the 3.5L V6 engine (VQ35DD) producing 284 horsepower, paired with a 9-speed automatic transmission. Bank 1 is one of the two cylinder banks on this V6. The code indicates the air-fuel ratio is too far lean on those cylinders.
Your 2024 Pathfinder is under full warranty. Any P0171-related repair should be handled by your Nissan dealer at no charge.
Symptoms You Might Notice
- Check engine light on
- Rough idle
- Hesitation on acceleration
- Reduced fuel economy
- Possible reduced towing power
- Misfires on Bank 1 cylinders
Common Causes of P0171 on the 2024 Nissan Pathfinder
- Intake or Vacuum Leak (30% likelihood) - Factory assembly issues like a loose intake connection or improperly seated gasket.
- MAF Sensor Issue (25% likelihood) - Contamination or defect from the factory.
- ECM Software Calibration (25% likelihood) - Nissan may have released fuel trim calibration updates for the 2024 model year.
- Fuel System Component (20% likelihood) - Factory defect in a fuel pump, injector, or pressure sensor.
How to Diagnose the Problem
- Visit your Nissan dealer - Full warranty coverage means free diagnosis and repair.
- Ask about TSBs - Check for applicable technical service bulletins.
- Scan for codes - Note companion codes for more context.
- Visual inspection - Check for loose intake connections.
Repair Options and Cost Breakdown
- Warranty repair - $0. Full coverage.
- Intake repair - $200 to $500 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 everything. There's no benefit to DIY work on a warrantied vehicle.
Prevention Tips
- Keep scheduled dealer appointments
- Use Top Tier gasoline
- Report performance changes immediately
- Use OEM air filters
- Avoid aftermarket modifications under warranty