What Does P0171 Mean on a 2024 Nissan Titan?
A P0171 code on your 2024 Nissan Titan means the engine control module detected a lean air-fuel mixture on Bank 1. The 2024 Titan continues with the 5.6L V8 engine (VK56VD) producing 400 horsepower and 413 lb-ft of torque, paired with a 9-speed automatic transmission. On this V8, 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 Titan is under full warranty. Take it to your Nissan dealer for free diagnosis and repair.
Symptoms You Might Notice
- Check engine light on
- Rough idle
- Hesitation during acceleration
- Reduced towing power
- Decreased fuel economy
- Possible misfires on Bank 1 cylinders
Common Causes of P0171 on the 2024 Nissan Titan
- Intake or Vacuum Leak (30% likelihood) - Factory assembly issues like a loose gasket or clamp can allow unmetered air into the V8's intake system.
- 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 updates for the 2024 model year VK56VD.
- Fuel System Component (20% likelihood) - Factory defect in the high-pressure 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 technical service bulletins for the 5.6L V8.
- Scan for codes - Check for P0174 and misfire codes.
- Visual inspection - Look for loose intake connections.
Repair Options and Cost Breakdown
- Warranty repair - $0. Full coverage on 2024 models.
- Intake repair - $300 to $650 if out of warranty.
- MAF sensor service - $50 to $300.
- ECM update - $0 to $150.
- Fuel system repair - $500 to $1,100.
Can You DIY This Repair?
Under warranty, let the dealer handle everything. There's no financial benefit to DIY work on a warrantied vehicle, and unauthorized repairs could affect warranty coverage.
Prevention Tips
- Keep all dealer service appointments
- Use Top Tier gasoline
- Change air filters frequently if driving in dusty conditions
- Report performance changes to your dealer
- Use OEM air filters only