Engine-Codes.com
Engine-Codes – Nissan – P0174 2011 Nissan Sentra

P0174 2011 Nissan Sentra Code - Fuel Injection System Too Lean Bank 2

Quick Answer

The P0174 code for a 2011 Nissan Sentra indicates that the fuel injection system on bank 2 is running too lean. Common causes include Vacuum leak, Faulty oxygen sensor, Clogged fuel filter. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0174 2011 Nissan Sentra indicates Fuel Injection System Too Lean Bank 2.
Common causes
Common causes include Vacuum leak, Faulty oxygen sensor, Clogged fuel filter.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0174 2011 Nissan Sentra Description

The P0174 code for a 2011 Nissan Sentra indicates that the fuel injection system on bank 2 is running too lean. This means that there is an imbalance in the air-fuel mixture being delivered to the engine on the second bank of cylinders. In a properly functioning system, the air-fuel mixture should be balanced to ensure optimal combustion and engine performance. When the mixture is too lean, there is not enough fuel being delivered to the cylinders, which can lead to a variety of issues.

OBDII Code P0174 2011 Nissan Sentra - Fuel Injection System Too Lean Bank 2
P0174 2011 Nissan Sentra Code - Fuel Injection System Too Lean Bank 2

Common Causes of P0174 2011 Nissan Sentra

  1. Vacuum leak
  2. Faulty oxygen sensor
  3. Clogged fuel filter
  4. Malfunctioning mass airflow sensor
  5. Issue with fuel injectors

Symptoms of P0174 2011 Nissan Sentra

  1. Rough idle or misfiring
  2. Loss of power during acceleration
  3. Reduced fuel efficiency
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P0174 2011 Nissan Sentra

  1. Diagnose the specific cause of the lean condition by checking for vacuum leaks, testing oxygen sensors, inspecting the fuel filter, and analyzing data from the mass airflow sensor.
  2. Replace any faulty components such as oxygen sensors, fuel filters, or mass airflow sensors.
  3. Clean or replace clogged fuel injectors.
  4. Reset the engine control module to clear the code and monitor the air-fuel mixture to ensure it is now within the correct range.
  5. Test drive the vehicle to confirm that the issue has been resolved and the engine is running smoothly.

Cost to Fix P0174 2011 Nissan Sentra

The cost of repairing a P0174 code on a 2011 Nissan Sentra can vary depending on the specific cause of the lean condition. In general, parts such as oxygen sensors, fuel filters, or mass airflow sensors can range from $50 to $200 each. Labor costs at an auto repair shop typically range from $80 to $150 per hour. The total repair cost could therefore range from $200 to $800 or more, depending on the extent of the issue and the specific parts that need to be replaced. It's recommended to consult with a qualified mechanic for a more accurate estimate based on your vehicle's specific needs.

What does this mean?

Tech Notes for P0174 2011 Nissan Sentra

If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced.

When is the Code Detected?

- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Need more information about the P0174 2011 Nissan Sentra code?

Need more information on how to fix the P0174 2011 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0174 2011 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0174 2011 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0174 on a 2011 Nissan Sentra?

- Common symptoms include rough idling, poor acceleration, hesitation when accelerating, and a noticeable decrease in fuel efficiency.

2. What does the OBDII code P0174 mean on a 2011 Nissan Sentra?

- The code indicates that the fuel injection system on bank 2 of the engine is operating too lean, meaning there is an imbalance in the air-fuel mixture.

3. What are the possible causes of OBDII code P0174 on a 2011 Nissan Sentra?

- Common causes include a vacuum leak, faulty oxygen sensor, clogged fuel filter, dirty or faulty fuel injectors, or a malfunctioning mass airflow sensor.

4. How can I diagnose the cause of OBDII code P0174 on my 2011 Nissan Sentra?

- You can use a scan tool to check for any other related trouble codes, inspect the air intake system for leaks, test the oxygen sensor, and check the fuel pressure to diagnose the issue.

5. Can a dirty air filter cause OBDII code P0174 on a 2011 Nissan Sentra?

- Yes, a dirty air filter can restrict airflow and lead to a lean air-fuel mixture, triggering the P0174 trouble code.

6. How can I repair OBDII code P0174 on a 2011 Nissan Sentra?

- Repair options may include fixing any vacuum leaks, replacing the oxygen sensor, cleaning or replacing the fuel filter, cleaning the fuel injectors, or replacing a faulty mass airflow sensor.

7. Is it safe to continue driving with OBDII code P0174 on a 2011 Nissan Sentra?

- It is not recommended to continue driving with this code as it can lead to engine damage over time and may cause further issues with the vehicle's performance.

8. How much does it typically cost to repair OBDII code P0174 on a 2011 Nissan Sentra?

- The cost of repairs can vary depending on the specific cause of the issue, but it is advisable to budget for diagnostic fees, parts, and labor costs.

9. Can I reset the OBDII code P0174 on my 2011 Nissan Sentra with a simple reset tool?

- While you can reset the code with an OBDII scanner, it is crucial to address the underlying issue causing the lean condition to prevent the code from reoccurring.

10. Will fixing OBDII code P0174 improve the overall performance of my 2011 Nissan Sentra?

- Yes, resolving the lean fuel condition indicated by the code can help restore proper engine performance, improve fuel efficiency, and prevent potential damage to the engine components.

Discuss the causes and fixes for P0174 2011 Nissan Sentra OBDII Code

Submit a New Comment

Code P0174 2011 Nissan Sentra comments

No comments found for this page.