P0171 2004 Infiniti G35 Code - Fuel Injection System Too Lean Bank 1
Quick Answer
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely 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
- P0171 2004 Infiniti G35 indicates Fuel Injection System Too Lean Bank 1.
- 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 P0171 2004 Infiniti G35 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 Malfunction Indicator Light (MIL) (2 trip detection logic).
What are the Possible Causes of the DTC P0171 2004 Infiniti G35?
- 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 P0171 2004 Infiniti G35?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0171 2004 Infiniti G35 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.
Need more information about the P0171 2004 Infiniti G35 code?
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Frequently Asked Questions about P0171 2004 Infiniti G35 Code
1. What does OBDII code P0171 on a 2004 Infiniti G35 mean?
The OBDII code P0171 in a 2004 Infiniti G35 indicates a fuel injection system too lean condition on Bank 1.
2. What are the common symptoms of OBDII code P0171 on a 2004 Infiniti G35?
Common symptoms of code P0171 in a 2004 Infiniti G35 include rough idling, poor acceleration, engine hesitation, and possibly an illuminated check engine light.
3. What are the possible causes of OBDII code P0171 on a 2004 Infiniti G35?
Common causes of code P0171 in a 2004 Infiniti G35 include a vacuum leak, faulty oxygen sensor, dirty or clogged fuel injectors, fuel pressure issues, or a malfunctioning mass airflow sensor.
4. How can I diagnose the issue causing OBDII code P0171 on my 2004 Infiniti G35?
To diagnose the cause of code P0171, you can start by checking for vacuum leaks, inspecting the oxygen sensor, cleaning or replacing fuel injectors, testing fuel pressure, and examining the mass airflow sensor for any problems.
5. Can a dirty air filter trigger OBDII code P0171 on a 2004 Infiniti G35?
Yes, a dirty air filter can restrict airflow to the engine, causing a lean fuel condition that triggers code P0171 in a 2004 Infiniti G35.
6. How important is it to address OBDII code P0171 on a 2004 Infiniti G35 promptly?
It is important to address code P0171 promptly on a 2004 Infiniti G35 to prevent potential engine damage, poor performance, and reduced fuel efficiency.
7. Is it safe to continue driving my 2004 Infiniti G35 with OBDII code P0171 present?
It is not recommended to drive your 2004 Infiniti G35 with code P0171 present, as it can lead to engine misfires, increased emissions, and other potential issues.
8. Can a faulty fuel pump cause OBDII code P0171 on a 2004 Infiniti G35?
Yes, a faulty fuel pump that does not deliver enough fuel pressure can contribute to a lean fuel condition triggering code P0171 in a 2004 Infiniti G35.
9. How much does it typically cost to repair OBDII code P0171 on a 2004 Infiniti G35?
The cost to repair code P0171 on a 2004 Infiniti G35 can vary depending on the specific cause, but it may range from around $100 for simple fixes like replacing an air filter to several hundred dollars for more complex repairs like replacing a faulty oxygen sensor.
10. Can a DIY enthusiast fix OBDII code P0171 on a 2004 Infiniti G35, or is it best left to a professional mechanic?
While some aspects of diagnosing and repairing code P0171 on a 2004 Infiniti G35 may be tackled by a DIY enthusiast, more complex issues like fuel system diagnostics or sensor replacements are best left to a professional mechanic with the necessary tools and expertise.
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