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P0170 Infiniti Code - Fuel Trim Malfunction Bank 1

Quick Answer

The P0170 code in an Infiniti indicates a fuel trim malfunction on Bank 1. Common causes include Faulty oxygen sensor, Vacuum leaks in the intake system, Dirty or 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
P0170 Infiniti indicates Fuel Trim Malfunction Bank 1.
Common causes
Common causes include Faulty oxygen sensor, Vacuum leaks in the intake system, Dirty or 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 P0170 Infiniti Description

The P0170 code in an Infiniti indicates a fuel trim malfunction on Bank 1. This means that the Engine Control Module (ECM) has detected that the air-fuel mixture is too lean or too rich on the first bank of cylinders. The fuel trim is a term used to describe the adjustment made by the ECM to the air-fuel mixture to ensure optimal combustion. When this code is triggered, it can lead to poor engine performance, reduced fuel efficiency, and potential damage to the catalytic converter over time.

OBDII Code P0170 Infiniti - Fuel Trim Malfunction Bank 1
P0170 Infiniti Code - Fuel Trim Malfunction Bank 1

Common Causes of P0170 Infiniti

  1. Faulty oxygen sensor
  2. Vacuum leaks in the intake system
  3. Dirty or clogged fuel injectors
  4. Fuel pressure regulator malfunction
  5. Issues with the Mass Air Flow (MAF) sensor

Symptoms of P0170 Infiniti

  1. Rough idling or stalling
  2. Decreased fuel efficiency
  3. Engine hesitation or misfires
  4. Check Engine Light illuminated
  5. Strong fuel odor from the exhaust

How to Fix P0170 Infiniti

  1. Diagnose the issue using a scan tool to confirm the P0170 code and identify the specific cause.
  2. Inspect and replace any faulty oxygen sensors, vacuum hoses, or fuel injectors.
  3. Clean or replace the MAF sensor and fuel pressure regulator if necessary.
  4. Clear the code and reset the ECM to see if the issue persists.
  5. Perform a test drive to ensure the repairs have resolved the fuel trim malfunction.

Cost to Fix P0170 Infiniti

The cost of repairing a P0170 code in an Infiniti can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the cost of parts such as oxygen sensors, vacuum hoses, or fuel injectors can range from $100 to $500, with labor costs adding another $100 to $300. Overall, you can expect to pay between $200 and $800 for this repair. It's recommended to consult with a trusted mechanic or dealership to get an accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P0170 Infiniti

A dirty air filter, air filter housing, Mass Air Flow (MAF) sensor, or faulty MAF sensor are common causes of the P0170 code.

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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 P0170 Infiniti Code

1. What does the OBDII code P0170 mean on an Infiniti?

P0170 indicates a Fuel Trim Malfunction on Bank 1, meaning the engine control module (ECM) is unable to properly adjust the air-fuel mixture on the first cylinder bank.

2. What are the common symptoms of code P0170 on an Infiniti?

Symptoms may include poor fuel economy, rough idling, difficulty starting, reduced engine performance, and the illumination of the Check Engine Light.

3. What are the common causes of a P0170 code on an Infiniti?

Causes include a faulty mass airflow (MAF) sensor, vacuum leaks, a failing oxygen sensor, fuel injector issues, or a malfunctioning fuel pressure regulator.

4. Can a dirty air filter cause the P0170 code?

Yes, a clogged or dirty air filter can restrict airflow and disrupt the air-fuel mixture, potentially triggering the P0170 code.

5. How do I diagnose the P0170 code on my Infiniti?

Start by checking for vacuum leaks, inspecting the MAF sensor, testing the oxygen sensors, and verifying the fuel pressure is within specification.

6. Is it safe to drive with a P0170 code on my Infiniti?

Driving with a P0170 code is not recommended, as it can lead to poor performance, increased emissions, and potential engine damage if left unaddressed.

7. Can bad fuel cause the P0170 code?

Yes, using contaminated or low-quality fuel can disrupt fuel trim and trigger the P0170 code.

8. How do I fix the P0170 code on my Infiniti?

Repairs may involve cleaning or replacing the MAF sensor, fixing vacuum leaks, replacing the oxygen sensor, or addressing fuel system issues like faulty injectors.

9. Can a faulty MAF sensor alone cause the P0170 code?

Yes, a malfunctioning MAF sensor can give incorrect airflow readings to the ECM, leading to improper fuel trim adjustments and triggering the P0170 code.

10. How much does it typically cost to fix a P0170 code on an Infiniti?

Repair costs vary but can range from $100 to $400 depending on the underlying issue, such as replacing sensors or fixing vacuum leaks.

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