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Engine-Codes – Nissan – P0171 2007 Nissan Maxima

P0171 2007 Nissan Maxima Code - Fuel Injection System Too Lean Bank 1

Quick Answer

The P0171 code for a 2007 Nissan Maxima indicates that the fuel injection system on bank 1 is running too lean. Common causes include Vacuum leak in the intake system, Faulty mass airflow 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
P0171 2007 Nissan Maxima indicates Fuel Injection System Too Lean Bank 1.
Common causes
Common causes include Vacuum leak in the intake system, Faulty mass airflow 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 11, 2024
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Code P0171 2007 Nissan Maxima Description

The P0171 code for a 2007 Nissan Maxima indicates that the fuel injection system on bank 1 is running too lean. This means that there is an imbalance in the air-fuel mixture being delivered to the engine, with too much air and not enough fuel. This can result in a variety of performance issues, including reduced power, rough idling, hesitation when accelerating, and potentially even engine misfires. A lean air-fuel mixture can also lead to increased emissions, which can cause the vehicle to fail emissions tests.

OBDII Code P0171 2007 Nissan Maxima - Fuel Injection System Too Lean Bank 1
P0171 2007 Nissan Maxima Code - Fuel Injection System Too Lean Bank 1

Common Causes of P0171 2007 Nissan Maxima

  1. Vacuum leak in the intake system
  2. Faulty mass airflow sensor
  3. Clogged fuel filter
  4. Malfunctioning fuel injector
  5. Issue with the fuel pump

Symptoms of P0171 2007 Nissan Maxima

  1. Reduced engine power
  2. Rough idling or stalling
  3. Hesitation or jerking during acceleration
  4. Increased fuel consumption
  5. Check Engine Light illuminated

How to Fix P0171 2007 Nissan Maxima

  1. Perform a thorough inspection of the intake system for any vacuum leaks and repair as necessary.
  2. Test and potentially replace the mass airflow sensor if faulty.
  3. Check and replace the fuel filter if it is clogged.
  4. Inspect and clean or replace the fuel injectors if they are malfunctioning.
  5. Test the fuel pump for proper operation and replace if needed.

Cost to Fix P0171 2007 Nissan Maxima

The cost of repairing a P0171 code on a 2007 Nissan Maxima can vary depending on the specific cause of the issue. In general, the cost of parts such as a mass airflow sensor, fuel filter, fuel injector, or fuel pump can range from $50 to $500 each. Labor costs for diagnosis and repair can range from $100 to $500 or more, depending on the shop's hourly rates and the complexity of the repair. Overall, the total cost for addressing a P0171 code can range from $200 to $1500 or more, including parts and labor. It is recommended to consult with a qualified mechanic to get an accurate estimate based on the specific circumstances of your vehicle.

What does this mean?

Tech Notes for P0171 2007 Nissan Maxima

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.)

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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 P0171 2007 Nissan Maxima Code

1. What does OBDII code P0171 on a 2007 Nissan Maxima mean?

The code P0171 indicates that the fuel injection system on Bank 1 is too lean, meaning there is too much air and not enough fuel in the air-fuel mixture.

2. What are some common symptoms of OBDII code P0171 on a 2007 Nissan Maxima?

Common symptoms of code P0171 include rough idling, poor acceleration, engine misfires, and a decrease in fuel efficiency.

3. What are the possible causes of OBDII code P0171 on a 2007 Nissan Maxima?

Potential causes of code P0171 include a vacuum leak, faulty oxygen sensor, clogged fuel filter, fuel pump issues, or a malfunctioning mass airflow sensor.

4. How can I diagnose the cause of OBDII code P0171 on my 2007 Nissan Maxima?

Diagnosing the cause of code P0171 usually involves checking for vacuum leaks, inspecting the oxygen sensor, testing the fuel pressure, and examining the mass airflow sensor.

5. Can a dirty or clogged air filter trigger OBDII code P0171 on a 2007 Nissan Maxima?

Yes, a dirty or clogged air filter can disrupt the air-fuel mixture ratio and potentially trigger code P0171 on a 2007 Nissan Maxima.

6. Is it safe to continue driving my 2007 Nissan Maxima with OBDII code P0171?

It is not recommended to drive your vehicle with code P0171 present, as it can lead to engine damage and further issues if left unresolved.

7. How can I repair OBDII code P0171 on my 2007 Nissan Maxima?

Repairing code P0171 involves addressing the root cause, such as fixing vacuum leaks, replacing faulty sensors, cleaning or replacing the air filter, and ensuring proper fuel system function.

8. Can I reset the OBDII code P0171 on my 2007 Nissan Maxima using a diagnostic scanner?

Yes, you can reset the code using a diagnostic scanner, but it is important to address and fix the underlying issue causing code P0171 to prevent it from reoccurring.

9. Will code P0171 on a 2007 Nissan Maxima cause the check engine light to illuminate?

Yes, OBDII code P0171 typically triggers the check engine light to illuminate on the dashboard of a 2007 Nissan Maxima.

10. How much does it cost to repair OBDII code P0171 on a 2007 Nissan Maxima?

The cost to repair code P0171 can vary depending on the underlying issue and the specific components that need to be replaced. It is recommended to consult a mechanic for an accurate estimate.

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