P0171 2006 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 2006 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 2006 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 2006 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 2006 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 2006 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.
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Frequently Asked Questions about P0171 2006 Infiniti G35 Code
1. What are the common symptoms of OBDII code P0171 in a 2006 Infiniti G35?
- Common symptoms include rough idling, poor acceleration, loss of power, and the illumination of the check engine light.
2. What does the OBDII code P0171 indicate for a 2006 Infiniti G35?
- The code indicates that the fuel injection system on Bank 1 is running too lean, meaning there is an imbalance of air and fuel mixture.
3. What are the possible causes of OBDII code P0171 in a 2006 Infiniti G35?
- Common causes include a vacuum leak, faulty oxygen sensor, dirty or clogged fuel injectors, a malfunctioning mass airflow sensor, or a faulty fuel pressure regulator.
4. How can I diagnose the cause of OBDII code P0171 in my 2006 Infiniti G35?
- Diagnose by checking for vacuum leaks, inspecting the oxygen sensor, cleaning or replacing fuel injectors, testing the mass airflow sensor, and checking fuel pressure.
5. Can a dirty air filter cause OBDII code P0171 in a 2006 Infiniti G35?
- Yes, a dirty air filter can disrupt the air-fuel mixture balance and lead to a lean condition triggering the P0171 code.
6. Is it safe to continue driving my 2006 Infiniti G35 with OBDII code P0171?
- While it may be possible to drive with the code present, it is not recommended as it can lead to poor engine performance and potential damage over time.
7. How can I reset the OBDII code P0171 in my 2006 Infiniti G35?
- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes, though the underlying issue should still be addressed.
8. Can a bad fuel pump cause OBDII code P0171 in a 2006 Infiniti G35?
- Yes, a failing fuel pump can affect fuel delivery, leading to a lean condition and triggering the P0171 code.
9. Will cleaning the mass airflow sensor help resolve OBDII code P0171 in a 2006 Infiniti G35?
- Cleaning the mass airflow sensor may help if it is dirty or contaminated, potentially improving the air-fuel mixture balance and resolving the lean condition.
10. How much does it typically cost to repair OBDII code P0171 in a 2006 Infiniti G35?
- The cost of repair can vary depending on the specific cause, but it may range from $100 to $500 or more, depending on the parts and labor required.
Discuss the causes and fixes for P0171 2006 Infiniti G35 OBDII Code
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Thanks for the info. If your 2006 Infiniti G35 is throwing a P0171 (too lean, Bank 1) and you’re getting a misfire when RPM drops to around 600, that usually points to a vacuum or fuel delivery issue showing up at idle.
Here’s what I’d check:
- Vacuum leaks: Common on this engine—cracked vacuum hoses, intake boot, or PCV valve/hose can cause a lean mix and misfire at low RPMs.
- Dirty or sticking MAF sensor: If it’s not reading airflow correctly, it can throw off the air/fuel mix. Try cleaning it with proper MAF cleaner.
- Fuel pressure: A weak fuel pump or clogged filter can lean out the mixture, especially at idle when the system runs at low load.
- Bank 1 O2 sensor: If the sensor is slow or failing, it might mislead the ECU into trimming fuel the wrong way.
The misfire could be secondary, caused by the lean condition. Start with a smoke test for vacuum leaks and check fuel trim readings if you can. Fixing the lean issue usually clears up the misfire too.
Let me know if anything was recently replaced or cleaned—it could help narrow things down.
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