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

Quick Answer

The P2248 Honda code indicates a problem with the O2 sensor reference voltage performance in Bank 2 Sensor 1. Common causes include Faulty O2 Sensor: The O2 sensor itself may be faulty and not providing accurate readings to the ECU, Wiring Issues: Problems with the wiring connecting the O2 sensor to the ECU can disrupt the reference voltage performance, Exhaust Leaks: Leaks in the exhaust system can introduce air into the exhaust stream, affecting the O2 sensor readings. 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 Honda indicates O2 Sensor Reference Voltage Performance Bank 2 Sensor 1.
Common causes
Common causes include Faulty O2 Sensor: The O2 sensor itself may be faulty and not providing accurate readings to the ECU, Wiring Issues: Problems with the wiring connecting the O2 sensor to the ECU can disrupt the reference voltage performance, Exhaust Leaks: Leaks in the exhaust system can introduce air into the exhaust stream, affecting the O2 sensor readings.
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 Honda Description

The P2248 Honda code indicates a problem with the O2 sensor reference voltage performance in Bank 2 Sensor 1. The O2 sensor, also known as the oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases as they exit the engine. This information is vital for the engine control unit (ECU) to adjust the air-fuel mixture to optimize combustion and reduce emissions.

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

Common Causes of P2248 Honda

  1. Faulty O2 Sensor: The O2 sensor itself may be faulty and not providing accurate readings to the ECU.
  2. Wiring Issues: Problems with the wiring connecting the O2 sensor to the ECU can disrupt the reference voltage performance.
  3. Exhaust Leaks: Leaks in the exhaust system can introduce air into the exhaust stream, affecting the O2 sensor readings.
  4. ECU Malfunction: Issues with the ECU can also impact the O2 sensor's performance and lead to this code being triggered.
  5. Sensor Contamination: Contaminants such as oil or coolant can affect the O2 sensor's function and cause it to malfunction.

Symptoms of P2248 Honda

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Decreased Fuel Efficiency: A faulty O2 sensor can cause the engine to run inefficiently, leading to decreased fuel efficiency.
  3. Rough Idling or Stalling: Incorrect air-fuel mixture due to a malfunctioning O2 sensor can result in rough idling or stalling.
  4. Poor Acceleration: The engine may struggle to accelerate smoothly if the O2 sensor is not providing accurate data.
  5. Increased Emissions: A malfunctioning O2 sensor can cause an increase in emissions, which may result in a failed emissions test.

How to Fix P2248 Honda

  1. Diagnose the Issue: Use an OBD-II scanner to read the code and determine the exact cause of the problem.
  2. Inspect Wiring: Check the wiring connecting the O2 sensor to the ECU for any damage or corrosion.
  3. Replace O2 Sensor: If the sensor is found to be faulty, replace it with a new, high-quality sensor.
  4. Repair Exhaust Leaks: Address any leaks in the exhaust system that may be affecting the O2 sensor readings.
  5. Clear Code and Test Drive: Clear the code from the ECU's memory, and take the vehicle for a test drive to ensure the issue has been resolved.

Cost to Fix P2248 Honda

The cost of repairing the O2 sensor reference voltage performance issue can vary depending on the specific cause of the problem and the labor rates in your area. Typically, the cost of a new O2 sensor can range from $50 to $200, depending on the make and model of your vehicle. Labor costs can add another $100 to $200, and additional costs may apply if other components need to be replaced or repaired. Overall, the total repair cost could range from $150 to $400 or more. It's important to consult with a qualified mechanic to get an accurate estimate based on your vehicle's specific needs. Labor rates at auto repair shops can vary, so it's advisable to inquire about pricing before proceeding with the repair.

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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.

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