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P2481 2015 GMC Sierra Code - Exhaust Gas Temperature Sensor 5 Circuit Low Voltage

Quick Answer

The P2481 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 5 Circuit, specifically reporting low voltage. Common causes include Faulty EGT Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the ECM, Wiring Issues: Damaged or corroded wiring connected to the EGT sensor can disrupt the voltage signal, ECM Malfunction: A problem with the engine control module can prevent it from receiving accurate data from the EGT 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
P2481 2015 GMC Sierra indicates Exhaust Gas Temperature Sensor 5 Circuit Low Voltage.
Common causes
Common causes include Faulty EGT Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the ECM, Wiring Issues: Damaged or corroded wiring connected to the EGT sensor can disrupt the voltage signal, ECM Malfunction: A problem with the engine control module can prevent it from receiving accurate data from the EGT 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 13, 2024
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Code P2481 2015 GMC Sierra Description

The P2481 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates a problem with the Exhaust Gas Temperature (EGT) Sensor 5 Circuit, specifically reporting low voltage. This sensor is responsible for monitoring the temperature of the exhaust gases before they enter the diesel particulate filter (DPF) system. The EGT sensor provides crucial data to the engine control module (ECM) to ensure optimal performance and emissions control.

OBDII Code P2481 2015 GMC Sierra - Exhaust Gas Temperature Sensor 5 Circuit Low Voltage
P2481 2015 GMC Sierra Code - Exhaust Gas Temperature Sensor 5 Circuit Low Voltage

Common Causes of P2481 2015 GMC Sierra

  1. Faulty EGT Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connected to the EGT sensor can disrupt the voltage signal.
  3. ECM Malfunction: A problem with the engine control module can prevent it from receiving accurate data from the EGT sensor.
  4. Exhaust System Leaks: Any leaks in the exhaust system can affect the readings of the EGT sensor, leading to low voltage signals.
  5. Sensor Placement: Improper installation or placement of the EGT sensor can also cause issues with voltage readings.

Symptoms of P2481 2015 GMC Sierra

  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 Power: The vehicle may experience a decrease in power output, making acceleration sluggish or difficult.
  3. Poor Fuel Economy: A faulty EGT sensor can lead to inefficient fuel combustion, resulting in decreased fuel efficiency.
  4. Increased Emissions: Low voltage from the EGT sensor can cause the vehicle to produce higher emissions than usual.
  5. DPF Regeneration Issues: Problems with the EGT sensor can disrupt the DPF regeneration process, leading to potential clogging and reduced performance.

How to Fix P2481 2015 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the exact cause of the low voltage signal from the EGT sensor.
  2. Inspect Wiring: Check the wiring harness connected to the EGT sensor for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test EGT Sensor: Test the EGT sensor itself to determine if it is functioning correctly. Replace the sensor if it is faulty.
  4. Check ECM: Verify that the engine control module is receiving accurate data from the EGT sensor. Address any ECM issues if necessary.
  5. Clear Codes and Test Drive: After completing the repairs, clear the DTCs from the ECM and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P2481 2015 GMC Sierra

The cost of repairing a P2481 code for the Exhaust Gas Temperature Sensor 5 Circuit Low Voltage in a 2015 GMC Sierra can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new EGT sensor or wiring harness, can range from $100 to $300. Labor costs at an auto repair shop typically range from $80 to $150 per hour, with the total repair time varying based on the complexity of the issue. Overall, the total repair cost for addressing this code could range from $200 to $500, including parts and labor. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.

What does this mean?

Tech Notes for P2481 2015 GMC Sierra

After starting the engine, the exhaust gas temperature sensor temperature should rise steadily, then stabilize after the engine reaches operating temperature. Exhaust gas temperature sensors may fail intermittently while operating under extreme temperatures. Review the Freeze Frame/Failure Records to verify the failure criteria.

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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 P2481 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P2481 on a 2015 GMC Sierra related to Exhaust Gas Temperature Sensor 5 Circuit Low Voltage?

The common symptoms include reduced engine performance, decreased fuel efficiency, and in some cases, the check engine light may illuminate.

2. What are the possible causes of OBDII code P2481 on a 2015 GMC Sierra?

The code P2481 can be triggered by issues such as a faulty exhaust gas temperature sensor, damaged wiring or connectors, or a problem with the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P2481 on my 2015 GMC Sierra?

To diagnose the issue, you can use a diagnostic scanner to retrieve the specific fault codes, visually inspect the wiring and connectors for any damage, and test the exhaust gas temperature sensor for proper functioning.

4. Can I continue driving my 2015 GMC Sierra with the OBDII code P2481 present?

It is not recommended to drive the vehicle with the code P2481 active, as it can lead to further damage to the engine or emissions system. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P2481 on a 2015 GMC Sierra?

Repair tips include checking and replacing the exhaust gas temperature sensor if faulty, repairing any damaged wiring or connectors, and resetting the fault codes after completing repairs.

6. How much does it cost to repair OBDII code P2481 on a 2015 GMC Sierra at a mechanic?

The cost of repairing OBDII code P2481 can vary depending on the exact cause of the issue and local labor rates. It is advisable to get a few quotes from different mechanics for an accurate estimate.

7. Can I reset the OBDII code P2481 on my 2015 GMC Sierra without fixing the underlying issue?

While you can clear the fault codes using a diagnostic scanner, the check engine light may reappear if the underlying problem is not addressed. It is recommended to fix the root cause of the issue.

8. Is OBDII code P2481 a serious problem on a 2015 GMC Sierra?

While OBDII code P2481 may not always indicate a critical issue, it can affect the performance and efficiency of the vehicle. Ignoring the problem may lead to more severe complications over time.

9. How long does it typically take to repair OBDII code P2481 on a 2015 GMC Sierra?

The repair time for OBDII code P2481 can vary based on the cause of the issue and the complexity of the repair. It may take anywhere from a few hours to a full day to complete the necessary repairs.

10. Can I fix OBDII code P2481 on my 2015 GMC Sierra myself, or should I consult a professional?

If you have experience with automotive repairs and access to the necessary tools, you may be able to address the issue yourself. However, if you are unsure or unfamiliar with the repair process, it is recommended to seek professional help.

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