P0174 2004 Nissan Maxima Code - Fuel Injection System Too Lean Bank 2
Quick Answer
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closer to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring. 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 Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring.
- 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.
Code P0174 2004 Nissan Maxima Description
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
The Diagnostic Trouble Code (DTC) will set when the Fuel Injection system does not operate properly or the amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
What are the Possible Causes of the DTC P0174 2004 Nissan Maxima?
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
How to Fix the DTC P0174 2004 Nissan Maxima?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0174 2004 Nissan Maxima code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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.
Discuss the causes and fixes for P0174 2004 Nissan Maxima OBDII Code
-
I have change fuel pump, service the injector, and replace some of the nossles, but I'm still seeing this code... and sometimes the power is low
-
If the fuel pump is OK and there are no intake air leaks, then the Air/Fuel Ratio Sensor Bank 2 it's more than likely the cause of the problem.
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