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P2248 Hyundai Code - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1

Quick Answer

The O2 Sensor Reference Voltage Performance Bank 2 Sensor 1 diagnostic trouble code (DTC) P2248 in Hyundai vehicles indicates that there is a performance issue with the oxygen sensor (O2 sensor) located in bank 2, which is typically the side of the engine where the cylinder number 2 is located. Common causes include Faulty O2 Sensor: The O2 sensor itself may be malfunctioning and not providing accurate readings, Wiring or Connector Issues: Loose or damaged wiring or connectors connecting the O2 sensor to the ECM can cause communication problems, Faulty ECM: A malfunctioning ECM may not be able to receive or interpret the signals from the O2 sensor correctly. 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
P2248 Hyundai indicates O2 Sensor Reference Voltage Performance Bank 2 Sensor 1.
Common causes
Common causes include Faulty O2 Sensor: The O2 sensor itself may be malfunctioning and not providing accurate readings, Wiring or Connector Issues: Loose or damaged wiring or connectors connecting the O2 sensor to the ECM can cause communication problems, Faulty ECM: A malfunctioning ECM may not be able to receive or interpret the signals from the O2 sensor correctly.
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 09, 2024
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Code P2248 Hyundai Description

The O2 Sensor Reference Voltage Performance Bank 2 Sensor 1 diagnostic trouble code (DTC) P2248 in Hyundai vehicles indicates that there is a performance issue with the oxygen sensor (O2 sensor) located in bank 2, which is typically the side of the engine where the cylinder number 2 is located. The sensor is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.

OBDII Code P2248 Hyundai - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1
P2248 Hyundai Code - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1

Common Causes of P2248 Hyundai

  1. Faulty O2 Sensor: The O2 sensor itself may be malfunctioning and not providing accurate readings.
  2. Wiring or Connector Issues: Loose or damaged wiring or connectors connecting the O2 sensor to the ECM can cause communication problems.
  3. Faulty ECM: A malfunctioning ECM may not be able to receive or interpret the signals from the O2 sensor correctly.
  4. Exhaust Leaks: Leaks in the exhaust system can affect the O2 sensor readings and performance.
  5. Vacuum Leak: A vacuum leak in the engine can impact the O2 sensor's ability to measure oxygen levels accurately.

Symptoms of P2248 Hyundai

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Fuel Efficiency: A malfunctioning O2 sensor can lead to an incorrect air-fuel mixture, resulting in decreased fuel efficiency.
  3. Rough Idling: The engine may idle roughly or inconsistently when the O2 sensor reference voltage is not performing correctly.
  4. Poor Acceleration: The vehicle may experience hesitation or lack of power during acceleration.
  5. Increased Emissions: A faulty O2 sensor can cause higher emissions output, potentially causing the vehicle to fail emissions testing.

How to Fix P2248 Hyundai

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble codes and perform tests to identify the root cause of the problem.
  2. Inspect O2 Sensor: Check the O2 sensor in bank 2 sensor 1 for any signs of damage or wear and replace if necessary.
  3. Check Wiring and Connectors: Inspect the wiring and connectors for any loose connections, corrosion, or damage and repair or replace as needed.
  4. Test ECM: Verify the functionality of the ECM by checking for any software updates or malfunctions that may be affecting the O2 sensor readings.
  5. Clear Codes and Test Drive: After completing the repairs, clear the trouble codes from the ECM, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2248 Hyundai

The typical repair costs for addressing the P2248 Hyundai code can vary depending on the specific cause of the issue. On average, the cost of replacing an O2 sensor can range from $100 to $300, including parts and labor. However, if the problem is related to wiring, connectors, or the ECM, the costs may increase accordingly. It is recommended to consult with a professional mechanic or dealership to get a more accurate estimate based on the specific diagnosis and repair needed. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to inquire about rates in your local area for a more precise cost estimate.

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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 P2248 Hyundai Code

1. What does the OBDII code P2248 mean on a Hyundai?

P2248 indicates an issue with the O2 sensor reference voltage performance on Bank 2 Sensor 1, meaning the sensor is reporting a voltage outside the expected range.

2. What are the symptoms of code P2248 on a Hyundai?

Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, a lit check engine light, and increased emissions.

3. What causes the P2248 code on a Hyundai?

Possible causes include a faulty Bank 2 Sensor 1 oxygen sensor, damaged wiring or connectors, a malfunctioning engine control module (ECM), or an exhaust leak near the sensor.

4. How do I diagnose the P2248 code on a Hyundai?

Start by inspecting the O2 sensor wiring and connectors for damage or corrosion, check for exhaust leaks, and use a multimeter to test the reference voltage at the sensor.

5. Can I still drive my Hyundai with a P2248 code?

While the car may still be drivable, driving with this code can lead to poor performance, reduced fuel efficiency, and potential damage to the catalytic converter over time.

6. How do I fix the P2248 code on a Hyundai?

Repairs may include replacing the faulty O2 sensor, repairing damaged wiring or connectors, addressing exhaust leaks, or updating/reprogramming the ECM.

7. How much does it cost to fix a P2248 code on a Hyundai?

The repair cost varies but typically includes $100–$300 for a new O2 sensor plus labor, depending on your location and vehicle model.

8. What tools are needed to troubleshoot the P2248 code?

Tools may include an OBDII scanner, multimeter, basic hand tools for removing the O2 sensor, and possibly a smoke machine to detect exhaust leaks.

9. What is the role of Bank 2 Sensor 1 in a Hyundai?

Bank 2 Sensor 1 is a pre-catalytic converter oxygen sensor that monitors the air-fuel ratio for one side of the engine to ensure optimal combustion.

10. Can a bad catalytic converter cause the P2248 code on a Hyundai?

While rare, a clogged or failing catalytic converter can disrupt O2 sensor readings, potentially triggering the P2248 code. Inspect other components first.

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