AutoCodes – Infiniti – P0172 2006 Infiniti G35

P0172 2006 Infiniti G35 Code - Fuel Injection System Too Rich 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 Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor. 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: P0172 2006 Infiniti G35 indicates Fuel Injection System Too Rich Bank 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor.
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.

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Code Popularity 2,893

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 02, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0172 2006 Infiniti G35 Description

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. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
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).

OBDII Code P0172 2006 Infiniti G35 - Fuel Injection System Too Rich Bank 1 - AutoCodes.com — P0172 2006 Infiniti G35 Code - Fuel Injection System Too Rich Bank 1

What does this mean?

What are the Possible Causes of the DTC P0172 2006 Infiniti G35?

Faulty Front Heated Oxygen Sensor
Faulty Spark Plugs
Faulty Mass Air Flow (MAF) sensor
Exhaust Gas Leaks
Ignition Misfiring
Incorrect Fuel Pressure
Faulty Fuel Injectors

How to Fix the DTC P0172 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0172 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.

Need more information about the P0172 2006 Infiniti G35 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 P0172 2006 Infiniti G35 Code

1. What does OBDII code P0172 for a 2006 Infiniti G35 mean?

The code P0172 indicates that the fuel injection system on Bank 1 of the engine is running too rich.

2. What are common symptoms of a P0172 code on a 2006 Infiniti G35?

Common symptoms include decreased fuel efficiency, rough idling, engine stalling, and the smell of unburned fuel from the exhaust.

3. What are the possible causes of a P0172 code on a 2006 Infiniti G35?

Possible causes include a faulty oxygen sensor, issues with the fuel injectors, a clogged air filter, vacuum leaks, or a malfunctioning mass airflow sensor.

4. How can I diagnose the P0172 code on my 2006 Infiniti G35?

Diagnosing the code may involve checking the oxygen sensor readings, inspecting the fuel injectors, testing the air filter and intake system for blockages, and looking for any vacuum leaks.

5. How can I repair a P0172 code on a 2006 Infiniti G35?

Repairing the code may involve replacing a faulty oxygen sensor, cleaning or replacing clogged fuel injectors, replacing the air filter, fixing any vacuum leaks, or replacing a malfunctioning mass airflow sensor.

6. Can a P0172 code on a 2006 Infiniti G35 cause damage to the engine?

Continuously running too rich can potentially cause damage to the engine over time, such as fouling spark plugs or damaging the catalytic converter.

7. Will a P0172 code on a 2006 Infiniti G35 cause the check engine light to illuminate?

Yes, the P0172 code will trigger the check engine light to come on in your 2006 Infiniti G35.

8. How urgent is it to address a P0172 code on a 2006 Infiniti G35?

While the vehicle may still be driveable with a P0172 code, it is important to address the issue promptly to prevent potential engine damage and improve fuel efficiency.

9. Can I reset the OBDII code P0172 on my 2006 Infiniti G35 with a simple scan tool?

Yes, you can reset the code using an OBDII scan tool, but it is recommended to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

10. Should I attempt to repair a P0172 code on my 2006 Infiniti G35 myself, or seek professional help?

Depending on your level of automotive knowledge and experience, you may attempt to repair the issue yourself. However, complex diagnostics and repairs may require professional assistance to ensure the problem is properly resolved.