Engine-Codes.com
Engine-Codes – Hyundai – P0139 Hyundai

P0139 Hyundai Code - HO2S Circuit Slow Response Bank 1 Sensor 2

Quick Answer

The P0139 diagnostic trouble code (DTC) for Hyundai vehicles refers to a potential issue with the HO2S (Heated Oxygen Sensor) circuit's slow response on Bank 1 Sensor 2. Common causes include Faulty HO2S (Bank 1 Sensor 2), Wiring harness damage or corrosion, Exhaust leaks near the sensor. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0139 Hyundai indicates HO2S Circuit Slow Response Bank 1 Sensor 2.
Common causes
Common causes include Faulty HO2S (Bank 1 Sensor 2), Wiring harness damage or corrosion, Exhaust leaks near the sensor.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0139 Hyundai Description

The P0139 diagnostic trouble code (DTC) for Hyundai vehicles refers to a potential issue with the HO2S (Heated Oxygen Sensor) circuit's slow response on Bank 1 Sensor 2. The HO2S is a crucial component of the vehicle's emissions control system, responsible for monitoring the oxygen levels in the exhaust gases to ensure optimal fuel efficiency and emissions. Bank 1 Sensor 2 specifically refers to the sensor located downstream of the catalytic converter on the side of the engine where cylinder 1 is located.

OBDII Code P0139 Hyundai - HO2S Circuit Slow Response Bank 1 Sensor 2
P0139 Hyundai Code - HO2S Circuit Slow Response Bank 1 Sensor 2

Common Causes of P0139 Hyundai

  1. Faulty HO2S (Bank 1 Sensor 2)
  2. Wiring harness damage or corrosion
  3. Exhaust leaks near the sensor
  4. ECM malfunction
  5. Poor quality fuel or contaminated fuel affecting sensor readings

Symptoms of P0139 Hyundai

  1. Decreased fuel efficiency
  2. Rough idling or engine misfires
  3. Check Engine Light illuminated
  4. Failed emissions test
  5. Loss of engine power

How to Fix P0139 Hyundai

  1. Begin by conducting a thorough visual inspection of the oxygen sensor and its wiring harness for any signs of damage or corrosion.
  2. Use a scan tool to monitor the sensor's response in real-time and compare it to the specifications provided by the manufacturer.
  3. Test the sensor's heating element to ensure it is functioning correctly.
  4. Replace the oxygen sensor if it fails to respond within the specified timeframe or shows signs of damage.
  5. Clear the DTC from the ECM's memory and conduct a road test to verify that the issue has been resolved.

Cost to Fix P0139 Hyundai

The cost of repairing a P0139 code on a Hyundai vehicle can vary depending on the specific model, labor rates in your area, and whether you choose to address the issue at a dealership, independent repair shop, or DIY. Typically, the price of a new oxygen sensor ranges from $50 to $200, with an additional 1-2 hours of labor required for installation. Factoring in diagnostic time and potential wiring repairs, the total cost could range from $150 to $400 or more. It's advisable to contact local repair shops for accurate quotes based on your vehicle's needs. Keep in mind that prompt attention to a P0139 code can prevent more significant and costly repairs down the line.

What does this mean?

Tech Notes for P0139 Hyundai

Replacing the Rear Heated Oxygen Sensor Bank 1 usually takes care of the problem.

When is the Code Detected?

The P0139 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor takes more time to respond between rich and lean than the specified time.

Need more information about the P0139 Hyundai code?

Need more information on how to fix the P0139 Hyundai code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0139 Hyundai code diagnosed by a professional: Find a repair shop in your area

Information for Specific Hyundai Models

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 P0139 Hyundai Code

1. What are the common symptoms of OBDII code P0139 on a Hyundai?

The common symptoms of code P0139 include poor fuel efficiency, rough idling, and hesitation during acceleration.

2. What does the HO2S Circuit Slow Response Bank 1 Sensor 2 code mean for a Hyundai?

The code P0139 indicates that the oxygen sensor downstream of the catalytic converter in bank 1 is responding slowly.

3. What are the possible causes of OBDII code P0139 on a Hyundai?

Possible causes of code P0139 include a faulty oxygen sensor, wiring issues, exhaust leaks, or a malfunctioning catalytic converter.

4. How can I diagnose the OBDII code P0139 on my Hyundai?

Diagnosing code P0139 involves checking the oxygen sensor's wiring, inspecting for exhaust leaks, and testing the sensor's response time using a scan tool.

5. Can a dirty or contaminated sensor cause code P0139 on a Hyundai?

Yes, a dirty or contaminated oxygen sensor can cause slow response times and trigger code P0139 on a Hyundai.

6. What is the recommended repair for OBDII code P0139 on a Hyundai?

The recommended repair for code P0139 is to replace the oxygen sensor in bank 1 sensor 2 if testing confirms it is faulty.

7. Are there any DIY tips for fixing OBDII code P0139 on a Hyundai?

DIY tips for fixing code P0139 include checking and cleaning the sensor's wiring connections, ensuring proper installation, and clearing the code with a scan tool.

8. Can driving with OBDII code P0139 on a Hyundai cause further damage?

Continuing to drive with code P0139 may lead to decreased fuel efficiency and potential damage to the catalytic converter over time.

9. How long does it typically take to repair OBDII code P0139 on a Hyundai?

Repairing code P0139 on a Hyundai can take anywhere from 30 minutes to an hour, depending on the location of the oxygen sensor and the ease of access.

10. Is it safe to drive my Hyundai with the check engine light on due to code P0139?

While it may be safe to drive short distances with code P0139, it is recommended to address the issue promptly to prevent potential long-term damage and ensure optimal vehicle performance.

Discuss the causes and fixes for P0139 Hyundai OBDII Code

Submit a New Comment

Code P0139 Hyundai comments

No comments found for this page.