AutoCodes – Hyundai – P0173 Hyundai

P0173 Hyundai Code - Fuel Trim Bank 2

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: P0173 Hyundai indicates Fuel Trim Bank 2.
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.

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Code Popularity 29,136

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0173 Hyundai 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 P0173 Hyundai - Fuel Trim Bank 2 - AutoCodes.com — P0173 Hyundai Code - Fuel Trim Bank 2

What does this mean?

What are the Possible Causes of the DTC P0173 Hyundai?

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 P0173 Hyundai?

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 P0173 Hyundai 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 P0173 Hyundai code?

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Need Help with the 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 P0173 Hyundai Code

1. What is OBDII code P0173 for Hyundai?

The OBDII code P0173 for Hyundai refers to a fuel trim system imbalance in Bank 2 of the engine.

2. What are common symptoms of OBDII code P0173 in a Hyundai?

Common symptoms of OBDII code P0173 in a Hyundai may include poor fuel economy, rough idling, engine hesitation, or a noticeable lack of power.

3. What are the possible causes of OBDII code P0173 in a Hyundai?

Potential causes of OBDII code P0173 in a Hyundai include a faulty oxygen sensor, vacuum leaks, a clogged fuel filter, a malfunctioning mass airflow sensor, or issues with the fuel injectors.

4. How can I diagnose OBDII code P0173 in my Hyundai?

Diagnosing OBDII code P0173 in a Hyundai typically involves using an OBDII scanner to read the code, checking for any other related trouble codes, inspecting the oxygen sensor, checking for vacuum leaks, and testing the fuel pressure.

5. How can I repair OBDII code P0173 in my Hyundai?

Repairing OBDII code P0173 in a Hyundai may involve replacing a faulty oxygen sensor, repairing any vacuum leaks, cleaning or replacing the mass airflow sensor, replacing a clogged fuel filter, or addressing issues with the fuel injectors.

6. Can I drive my Hyundai with OBDII code P0173?

It is not recommended to drive your Hyundai with OBDII code P0173 for an extended period, as it can lead to poor engine performance and potential damage if left unresolved.

7. How serious is OBDII code P0173 in a Hyundai?

OBDII code P0173 in a Hyundai should be addressed promptly to prevent further issues with the engine's performance and fuel efficiency.

8. How much does it cost to fix OBDII code P0173 in a Hyundai?

The cost to fix OBDII code P0173 in a Hyundai can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars for parts and labor.

9. Can a DIY enthusiast repair OBDII code P0173 in a Hyundai?

Some aspects of diagnosing and repairing OBDII code P0173 in a Hyundai may be suitable for experienced DIY enthusiasts, but certain repairs may require professional expertise and specialized tools.

10. How can I prevent OBDII code P0173 from reoccurring in my Hyundai?

To prevent OBDII code P0173 from reoccurring in your Hyundai, it is essential to perform regular maintenance, address any issues promptly, use high-quality fuel, and follow the manufacturer's recommended service schedule.