AutoCodes – GMC – P2471 2018 GMC Sierra

P2471 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

Quick Answer

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 4, Exhaust Gas Temperature Sensor 4 harness is open or shorted, Exhaust Gas Temperature Sensor 4 circuit poor electrical connection. 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 2018 GMC Sierra indicates Exhaust Gas Temperature Sensor 4 Circuit High Voltage.
Common causes: Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 4, Exhaust Gas Temperature Sensor 4 harness is open or shorted, Exhaust Gas Temperature Sensor 4 circuit poor electrical connection.
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.

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Code Popularity 187

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 03, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2471 2018 GMC Sierra Description

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Exhaust temperature sensor 1 is the first exhaust temperature sensor in the exhaust system, the following exhaust temperature sensors are counted upward from the engine outlet to the exhaust system end. The Engine Control Module (ECM) supplies 5 V to the exhaust gas temperature signal circuit and supplies a ground to the low reference circuit. The exhaust gas temperature sensor temperature information is used by the ECM during the exhaust gas particulate filter cleaning process. The Diagnostic Trouble Code (DTC) will ve set when the ECM detects that the exhaust gas temperature sensor is greater than 900 Ω for greater than 2 s.

OBDII Code P2471 2018 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit High Voltage - AutoCodes.com — P2471 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2471 2018 GMC Sierra?

Faulty Exhaust Gas Temperature Sensor (EGTS) 4
Exhaust Gas Temperature Sensor 4 harness is open or shorted
Exhaust Gas Temperature Sensor 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2471 2018 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2471 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2471 2018 GMC Sierra code?

Need more information on how to fix the P2471 2018 GMC Sierra code? Get Access to Factory Service Manuals

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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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2471 in a 2018 GMC Sierra?

When the Exhaust Gas Temperature Sensor 4 Circuit registers high voltage, common symptoms include reduced engine performance, decreased fuel efficiency, and possibly the illumination of the check engine light.

2. What are the potential causes of OBDII code P2471 in a 2018 GMC Sierra?

The high voltage in the Exhaust Gas Temperature Sensor 4 Circuit can be triggered by issues such as a faulty sensor, damaged wiring, a poor electrical connection, or problems with the engine control module.

3. How can I diagnose the cause of OBDII code P2471 in my 2018 GMC Sierra?

To diagnose the issue, you can start by visually inspecting the sensor and its wiring for any visible damage. Using a multimeter, you can test the sensor's resistance and voltage output to determine if it is functioning correctly.

4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P2471 active?

While the vehicle may still be operational with this code, it is recommended to address the issue promptly to prevent potential damage to the engine or emissions system. Continued driving with a faulty sensor can lead to more severe problems over time.

5. Can I reset OBDII code P2471 in my 2018 GMC Sierra without fixing the underlying issue?

Resetting the code without fixing the root cause will only temporarily turn off the check engine light. The code will likely reappear once the issue persists, so it's best to address the problem to ensure proper vehicle functionality.

6. How much does it typically cost to repair OBDII code P2471 in a 2018 GMC Sierra?

The cost of repairing OBDII code P2471 can vary depending on the exact cause of the issue. Expenses may include the price of a new sensor, labor costs for installation, and any additional components that need to be replaced or repaired.

7. Can I replace the Exhaust Gas Temperature Sensor 4 in my 2018 GMC Sierra myself?

Replacing the sensor yourself is possible if you have the necessary tools and automotive knowledge. However, if you're unsure about the process or lack experience, it's recommended to seek professional assistance to ensure the job is done correctly.

8. How long does it typically take to repair OBDII code P2471 in a 2018 GMC Sierra?

The repair time for OBDII code P2471 can vary based on the exact issue and the expertise of the technician. In general, the repair process can take anywhere from 1 to 3 hours, depending on the complexity of the repair.

9. Will fixing OBDII code P2471 improve the overall performance of my 2018 GMC Sierra?

Addressing the high voltage issue in the Exhaust Gas Temperature Sensor 4 Circuit can help restore optimal engine performance, improve fuel efficiency, and prevent potential damage to other components in the vehicle.

10. Are there any preventive measures I can take to avoid OBDII code P2471 in my 2018 GMC Sierra in the future?

Regular maintenance, such as inspecting and cleaning the sensors, checking the wiring for damage, and addressing any engine issues promptly, can help prevent the recurrence of OBDII code P2471 in your 2018 GMC Sierra.