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Engine-Codes – Mercury – P2248 Mercury

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

Quick Answer

The P2248 diagnostic trouble code (DTC) for Mercury vehicles refers to an issue with the O2 sensor reference voltage performance in Bank 2 Sensor 1. Common causes include Faulty O2 sensor, Wiring or connector issues, 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
P2248 Mercury indicates O2 Sensor Reference Voltage Performance Bank 2 Sensor 1.
Common causes
Common causes include Faulty O2 sensor, Wiring or connector issues, 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 09, 2024
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Code P2248 Mercury Description

The P2248 diagnostic trouble code (DTC) for Mercury vehicles refers to an issue 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 emitted from the engine. This specific sensor, located in Bank 2 Sensor 1 position, is responsible for providing feedback to the engine control module (ECM) to ensure the optimal air-fuel mixture for combustion.

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

Common Causes of P2248 Mercury

  1. Faulty O2 sensor
  2. Wiring or connector issues
  3. Exhaust leaks near the sensor
  4. ECM malfunction
  5. Vacuum leaks

Symptoms of P2248 Mercury

  1. Decreased fuel efficiency
  2. Engine hesitation or misfires
  3. Rough idling or stalling
  4. Increased emissions
  5. Check Engine Light illuminated

How to Fix P2248 Mercury

  1. Perform a thorough inspection of the O2 sensor wiring and connectors to check for any damage or corrosion.
  2. Test the O2 sensor using a multimeter to verify its functionality.
  3. Check for exhaust leaks near the sensor and repair as needed.
  4. Clear the DTC and reset the ECM to see if the code reappears after repairs.
  5. If the issue persists, consider replacing the O2 sensor or consulting a professional mechanic for further diagnosis.

Cost to Fix P2248 Mercury

The typical repair costs for addressing the P2248 code on a Mercury vehicle can range from $200 to $500, depending on the specific cause of the issue and the cost of parts. This estimate includes the cost of a new O2 sensor, any necessary wiring repairs, and labor charges. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from local shops for a more accurate 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.

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