P0171 2003 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 2003 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 2003 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 2003 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 2003 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 2003 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 2003 Infiniti G35 Code
1. What are common symptoms of OBDII code P0171 on a 2003 Infiniti G35?
- Common symptoms include rough idle, poor acceleration, engine hesitation, and potential stalling.
2. What does the OBDII code P0171 for a 2003 Infiniti G35 indicate?
- The code indicates that the fuel injection system is running too lean on Bank 1 of the engine.
3. What are the possible causes of OBDII code P0171 in a 2003 Infiniti G35?
- Common causes include a vacuum leak, faulty oxygen sensor, clogged fuel filter, dirty mass airflow sensor, or a malfunctioning fuel injector.
4. How can I diagnose the reason behind OBDII code P0171 on my 2003 Infiniti G35?
- You can start by checking for vacuum leaks, inspecting the oxygen sensor, testing the fuel pressure, cleaning the mass airflow sensor, and checking the fuel injector operation.
5. Can a dirty air filter trigger OBDII code P0171 on a 2003 Infiniti G35?
- Yes, a dirty or clogged air filter can disrupt the air-fuel mixture ratio and lead to a lean condition, triggering the P0171 code.
6. Is it safe to continue driving my 2003 Infiniti G35 with OBDII code P0171?
- It is not recommended to drive extensively with the P0171 code as it can lead to poor engine performance and potential damage in the long run.
7. How can I reset the OBDII code P0171 on my 2003 Infiniti G35 after performing repairs?
- You can reset the code using an OBDII scanner tool or by disconnecting the car battery for a few minutes to clear the error code.
8. Will fixing OBDII code P0171 on a 2003 Infiniti G35 improve fuel efficiency?
- Yes, resolving the P0171 code by addressing the underlying issues can help improve fuel efficiency and overall engine performance.
9. Can a bad fuel pump cause OBDII code P0171 in a 2003 Infiniti G35?
- While a failing fuel pump may not directly cause the P0171 code, it can contribute to a lean condition if it is not delivering enough fuel to the engine.
10. How much does it typically cost to repair OBDII code P0171 on a 2003 Infiniti G35?
- The cost of repairing the P0171 code can vary depending on the underlying issue, but it may range from $100 to $500 or more, including parts and labor.
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