What Does P0171 Mean on a 2023 Nissan Murano?
A P0171 code on your 2023 Nissan Murano means the engine control module detected a lean air-fuel mixture on Bank 1. The 2023 Murano, the final model year before its redesign, uses a 3.5L V6 engine (VQ35DE) producing 260 horsepower paired with a CVT. On this V6, Bank 1 is one of the two cylinder banks.
Your 2023 Murano should be under warranty. Take it to your Nissan dealer for a free diagnosis and repair before attempting anything yourself.
Symptoms You Might Notice
- Check engine light on
- Rough idle
- Hesitation on acceleration
- Reduced fuel economy
- Engine surging
- Possible misfires
Common Causes of P0171 on the 2023 Nissan Murano
- MAF Sensor Issue (30% likelihood) - Contamination or early defect in the mass airflow sensor.
- Vacuum or Intake Leak (25% likelihood) - Gasket or hose issues, possibly from factory assembly.
- Software Calibration (25% likelihood) - ECM updates may be available from Nissan.
- Fuel System Component (20% likelihood) - Fuel pump, injector, or pressure sensor issue.
How to Diagnose the Problem
- Dealer visit - Warranty coverage means free diagnosis and repair.
- Ask about TSBs - Check for service bulletins specific to the 2023 Murano.
- Scan for codes - Note companion codes like P0174.
- Monitor fuel trims - Compare Bank 1 vs Bank 2.
Repair Options and Cost Breakdown
- Warranty repair - $0.
- MAF sensor service - $50 to $280 if out of pocket.
- Vacuum repair - $150 to $450.
- ECM update - $0 to $150.
- Fuel system repair - $300 to $700.
Can You DIY This Repair?
Under warranty, let the dealer handle it. The only easy DIY task is MAF sensor cleaning, but warranty coverage makes it unnecessary to do yourself.
Prevention Tips
- Keep dealer service appointments
- Use Top Tier gasoline
- Use OEM air filters
- Report performance changes immediately
- Follow Nissan's maintenance schedule