AutoCodes – GMC – P2471 2016 GMC Sierra

P2471 2016 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 2016 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 222

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 2016 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 2016 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit High Voltage - AutoCodes.com — P2471 2016 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2471 2016 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 2016 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 2016 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 2016 GMC Sierra code?

Need more information on how to fix the P2471 2016 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 2016 GMC Sierra Code

1. What does the OBDII code P2471 mean on a 2016 GMC Sierra?

P2471 indicates a high voltage issue in the Exhaust Gas Temperature Sensor 4 circuit, which monitors exhaust temperatures to ensure proper emissions control.

2. What are the symptoms of code P2471 on a 2016 GMC Sierra?

Common symptoms include an illuminated check engine light, reduced engine performance, increased emissions, and possible overheating of exhaust components.

3. What causes the P2471 code to appear on a 2016 GMC Sierra?

Causes may include a faulty Exhaust Gas Temperature Sensor 4, damaged wiring or connectors, a short circuit, or a malfunctioning ECM.

4. Can I drive my 2016 GMC Sierra with the P2471 code?

Driving with this code is not recommended as it may affect engine performance and emissions, and prolonged use can damage exhaust system components.

5. How do I diagnose the P2471 code on a 2016 GMC Sierra?

Start by scanning for codes, inspecting the Exhaust Gas Temperature Sensor 4 and its wiring for damage, and testing the sensorâ€™s voltage and resistance with a multimeter.

6. How is the P2471 code fixed on a 2016 GMC Sierra?

Repairs may involve replacing the Exhaust Gas Temperature Sensor 4, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.

7. What tools are needed to fix the P2471 code on a 2016 GMC Sierra?

You may need an OBDII scanner, a multimeter, basic hand tools, and possibly a wiring repair kit to diagnose and fix this issue.

8. How much does it cost to repair the P2471 code on a 2016 GMC Sierra?

The cost can vary but typically ranges from $100 to $300, depending on whether the sensor needs replacement or if wiring repairs are required.

9. Can a faulty Exhaust Gas Temperature Sensor 4 damage the engine?

While it may not directly damage the engine, it can lead to overheating in exhaust components or improper emissions control if not addressed.

10. How can I prevent the P2471 code from reoccurring on my 2016 GMC Sierra?

Regular maintenance, inspecting the exhaust system for damage, and addressing sensor or wiring issues promptly can help prevent this code from returning.