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P0174 2004 Nissan Maxima Code - Fuel Injection System Too Lean Bank 2

Quick Answer

When the OBD-II code P0174 appears on a 2004 Nissan Maxima, it indicates that the fuel injection system on the vehicle's Bank 2 side is running too lean. Common causes include Vacuum leaks in the intake system, Faulty oxygen sensor, Clogged fuel injectors. 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 2004 Nissan Maxima indicates Fuel Injection System Too Lean Bank 2.
Common causes
Common causes include Vacuum leaks in the intake system, Faulty oxygen sensor, Clogged fuel injectors.
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 Aug 25, 2024
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Code P0174 2004 Nissan Maxima Description

When the OBD-II code P0174 appears on a 2004 Nissan Maxima, it indicates that the fuel injection system on the vehicle's Bank 2 side is running too lean. This means that there is an imbalance in the air-fuel mixture, resulting in insufficient fuel being delivered to the engine. The imbalance can lead to poor engine performance, reduced fuel efficiency, and potential damage to the engine over time.

OBDII Code P0174 2004 Nissan Maxima - Fuel Injection System Too Lean Bank 2
P0174 2004 Nissan Maxima Code - Fuel Injection System Too Lean Bank 2

Common Causes of P0174 2004 Nissan Maxima

  1. Vacuum leaks in the intake system
  2. Faulty oxygen sensor
  3. Clogged fuel injectors
  4. Low fuel pressure
  5. Mass airflow sensor issues

Symptoms of P0174 2004 Nissan Maxima

  1. Engine misfires or runs rough
  2. Reduced acceleration and power
  3. Poor fuel economy
  4. Check Engine Light illuminated
  5. Rough idling or stalling

How to Fix P0174 2004 Nissan Maxima

  1. Perform a thorough inspection of the intake system for any vacuum leaks and repair as needed.
  2. Test and replace any faulty oxygen sensors.
  3. Clean or replace clogged fuel injectors.
  4. Check and adjust fuel pressure to the manufacturer's specifications.
  5. Inspect and clean the mass airflow sensor or replace if necessary.

Cost to Fix P0174 2004 Nissan Maxima

The cost of repairing a P0174 code on a 2004 Nissan Maxima can vary depending on the specific cause of the issue. On average, the repair cost can range from $200 to $800, including parts and labor. Keep in mind that diagnostic time and labor rates can impact the final cost, so it's recommended to get a quote from a trusted auto repair shop in your area.

What does this mean?

Tech Notes for P0174 2004 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.

There is a factory service bulletin for the following Nissan models:

2004 Maxima (A34) with 5 speed A/T only
2004 Nissan Maxima Factory Service Bulletin OBDII Code P0174

2004 Maxima (A34) with 4-speed A/T and 6-speed M/T2004 Nissan Maxima Factory Service Bulletin OBDII Code P0174













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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 P0174 2004 Nissan Maxima Code

1. What are common symptoms of OBDII code P0174 on a 2004 Nissan Maxima?

- Common symptoms include rough idling, reduced power, engine hesitation, and an illuminated check engine light.

2. What does the OBDII code P0174 for a 2004 Nissan Maxima indicate?

- The code P0174 indicates that the fuel injection system on Bank 2 is running too lean, meaning there is too much air or too little fuel in the mixture.

3. What are potential causes of OBDII code P0174 on a 2004 Nissan Maxima?

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

4. How can I diagnose the cause of OBDII code P0174 on my 2004 Nissan Maxima?

- Diagnostic steps may include checking for vacuum leaks, inspecting the oxygen sensor, testing the mass airflow sensor, examining the fuel filter, and ensuring proper fuel injector function.

5. What are some repair tips for addressing OBDII code P0174 on a 2004 Nissan Maxima?

- Repair tips may involve fixing any vacuum leaks, replacing a faulty oxygen sensor, cleaning or replacing the mass airflow sensor, changing the fuel filter, or servicing the fuel injectors.

6. Can driving with OBDII code P0174 on a 2004 Nissan Maxima cause further damage?

- Continuing to drive with a lean fuel mixture can potentially damage the engine over time, so it's advisable to address the issue promptly.

7. How much does it typically cost to repair OBDII code P0174 on a 2004 Nissan Maxima?

- The cost of repairs can vary depending on the specific cause, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Is it safe to continue driving my 2004 Nissan Maxima with OBDII code P0174?

- While it may be safe to drive for a short period, it's recommended to address the issue as soon as possible to prevent potential engine damage and ensure optimal performance.

9. Can I clear the OBDII code P0174 on my 2004 Nissan Maxima with a reset tool?

- Clearing the code with a reset tool may temporarily turn off the check engine light, but it will not fix the underlying issue causing the lean fuel mixture.

10. How often does OBDII code P0174 occur in a 2004 Nissan Maxima, and is it a common problem?

- OBDII code P0174 can occur occasionally in vehicles with a lean fuel mixture issue, but it is not considered a common problem specific to the 2004 Nissan Maxima.

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