AutoCodes – GMC – P2471 2014 GMC Sierra

P2471 2014 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 2014 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 174

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 2014 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 2014 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit High Voltage - AutoCodes.com — P2471 2014 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2471 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P2471 2014 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 2014 GMC Sierra Code

What does the OBD-II code P2471 mean for a 2014 GMC Sierra?

Code P2471 indicates a high voltage issue in the Exhaust Gas Temperature (EGT) Sensor 4 circuit, which monitors exhaust temperatures to optimize emissions control.

What are the common symptoms of code P2471 in a 2014 GMC Sierra?

Symptoms may include the check engine light turning on, reduced engine performance, increased emissions, and possible activation of limp mode.

What causes code P2471 on a 2014 GMC Sierra?

The code is typically caused by a faulty EGT sensor, damaged wiring or connectors in the sensor circuit, or issues with the powertrain control module (PCM).

How can I diagnose the P2471 code on my GMC Sierra?

Start by checking the wiring and connectors for damage or corrosion, then test the EGT sensor for proper functionality, and inspect the PCM for faults if other components appear fine.

Can I drive my 2014 GMC Sierra with the P2471 code?

While the vehicle may still be operable, driving with this code can lead to reduced performance, higher emissions, and potential damage to the exhaust system.

How do I repair the P2471 code on a GMC Sierra?

Typical repairs include replacing the EGT sensor, repairing or replacing damaged wiring or connectors, and updating or replacing the PCM if necessary.

How much does it cost to fix the P2471 code on a 2014 GMC Sierra?

Repair costs can vary, but replacing an EGT sensor typically costs $100-$300, while wiring repairs or PCM replacement can be more expensive depending on the extent of the issue.

Is the P2471 code related to emissions control?

Yes, the EGT sensor helps monitor exhaust temperatures to manage emissions control systems effectively, and a malfunction can impact emissions compliance.

Can a faulty EGT sensor damage the engine or exhaust system?

Yes, a faulty EGT sensor can cause improper exhaust temperature readings, potentially leading to overheating or damage to the catalytic converter and other components.

How do I prevent the P2471 code from recurring?

Regular maintenance, including inspecting wiring and sensors for damage, addressing exhaust system issues promptly, and keeping the PCM updated, can help prevent this code from recurring.