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P2471 2017 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

Quick Answer

The P2471 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Exhaust Gas Temperature (EGT) Sensor 4 Circuit registering a high voltage. Common causes include Faulty EGT Sensor 4, Wiring issues such as shorts or open circuits, ECM software malfunction. 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
P2471 2017 GMC Sierra indicates Exhaust Gas Temperature Sensor 4 Circuit High Voltage.
Common causes
Common causes include Faulty EGT Sensor 4, Wiring issues such as shorts or open circuits, ECM software malfunction.
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 15, 2024
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Code P2471 2017 GMC Sierra Description

The P2471 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Exhaust Gas Temperature (EGT) Sensor 4 Circuit registering a high voltage. This sensor is crucial for monitoring the temperature of the exhaust gas leaving the engine. When the EGT Sensor 4 Circuit detects a voltage higher than the specified range, it triggers the P2471 code. This issue can have significant implications for the vehicle's performance and emissions control system.

OBDII Code P2471 2017 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit High Voltage
P2471 2017 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

Common Causes of P2471 2017 GMC Sierra

  1. Faulty EGT Sensor 4.
  2. Wiring issues such as shorts or open circuits.
  3. ECM software malfunction.
  4. Exhaust system leaks.
  5. Exhaust gas temperature anomalies.

Symptoms of P2471 2017 GMC Sierra

  1. Check Engine Light illuminated on the dashboard.
  2. Decreased fuel efficiency.
  3. Rough idling or engine misfires.
  4. Reduced engine power.
  5. Failed emissions test.

How to Fix P2471 2017 GMC Sierra

  1. Begin by diagnosing the EGT Sensor 4 Circuit using a scan tool to confirm the high voltage reading.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the EGT Sensor 4 for proper operation and replace if found to be faulty.
  4. Clear the DTC and reset the ECM to see if the issue persists.
  5. Perform a road test to ensure the repair was successful and the code does not return.

Cost to Fix P2471 2017 GMC Sierra

The typical repair costs for addressing a P2471 code on a 2017 GMC Sierra can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to obtain quotes from local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P2471 2017 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 P2471 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2471 in a 2017 GMC Sierra?

- Common symptoms include reduced engine performance, increased fuel consumption, and possibly the illumination of the Check Engine Light.

2. What does the OBDII code P2471 on a 2017 GMC Sierra indicate?

- The code P2471 indicates a high voltage condition detected in the circuit of Exhaust Gas Temperature Sensor 4 in the vehicle's exhaust system.

3. What are the potential causes of OBDII code P2471 in a 2017 GMC Sierra?

- Possible causes of this code include a faulty Exhaust Gas Temperature Sensor 4, wiring issues in the sensor circuit, or a problem with the sensor's connection.

4. How can I diagnose the OBDII code P2471 in a 2017 GMC Sierra?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the code, inspecting the wiring and connections of the Exhaust Gas Temperature Sensor 4, and testing the sensor itself for proper function.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P2471?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to potential engine damage or other issues. It's best to address the problem promptly.

6. Is it possible to reset the OBDII code P2471 in a 2017 GMC Sierra?

- While you can clear the code temporarily with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P2471 in a 2017 GMC Sierra?

- The cost of repairing this code can vary depending on the root cause. It may involve replacing the Exhaust Gas Temperature Sensor 4, repairing wiring issues, or addressing other related components.

8. Are there any DIY repair tips for fixing OBDII code P2471 in a 2017 GMC Sierra?

- DIY repair tips may include checking the sensor's wiring for damage, ensuring proper sensor connections, and testing the sensor's resistance to determine if it's faulty before replacing it.

9. Can a faulty Exhaust Gas Temperature Sensor 4 cause other issues in a 2017 GMC Sierra?

- Yes, a faulty sensor can lead to poor engine performance, increased emissions, and potential damage to other components if left unresolved.

10. How important is it to address OBDII code P2471 promptly in a 2017 GMC Sierra?

- It is crucial to address this code promptly to prevent further engine damage, ensure optimal performance, and maintain fuel efficiency in your 2017 GMC Sierra.

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