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P2471 2016 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

Quick Answer

The P2471 diagnostic trouble code (DTC) specifically relates to the Exhaust Gas Temperature (EGT) Sensor 4 Circuit registering a high voltage. Common causes include Faulty EGT Sensor 4: The most common cause of the P2471 code is a malfunctioning EGT Sensor 4, which can lead to inaccurate temperature readings, Wiring Issues: Damaged or corroded wiring in the sensor circuit can disrupt the signal between the sensor and the ECM, triggering the high voltage code, ECM Malfunction: A problem with the engine control module receiving and interpreting data from the EGT Sensor 4 can also cause the code to appear. 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 Chevrolet Silverado indicates Exhaust Gas Temperature Sensor 4 Circuit High Voltage.
Common causes
Common causes include Faulty EGT Sensor 4: The most common cause of the P2471 code is a malfunctioning EGT Sensor 4, which can lead to inaccurate temperature readings, Wiring Issues: Damaged or corroded wiring in the sensor circuit can disrupt the signal between the sensor and the ECM, triggering the high voltage code, ECM Malfunction: A problem with the engine control module receiving and interpreting data from the EGT Sensor 4 can also cause the code to appear.
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 17, 2024
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Code P2471 2016 Chevrolet Silverado Description

The P2471 diagnostic trouble code (DTC) specifically relates to the Exhaust Gas Temperature (EGT) Sensor 4 Circuit registering a high voltage. In a 2016 Chevrolet Silverado, this code indicates that there is an issue with the EGT Sensor 4, which is responsible for monitoring the exhaust gas temperature in the diesel particulate filter (DPF) system. The EGT sensor plays a crucial role in ensuring the optimal performance and efficiency of the DPF system by providing data to the engine control module (ECM) to regulate exhaust gas temperature.

OBDII Code P2471 2016 Chevrolet Silverado - Exhaust Gas Temperature Sensor 4 Circuit High Voltage
P2471 2016 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 4 Circuit High Voltage

Common Causes of P2471 2016 Chevrolet Silverado

  1. Faulty EGT Sensor 4: The most common cause of the P2471 code is a malfunctioning EGT Sensor 4, which can lead to inaccurate temperature readings.
  2. Wiring Issues: Damaged or corroded wiring in the sensor circuit can disrupt the signal between the sensor and the ECM, triggering the high voltage code.
  3. ECM Malfunction: A problem with the engine control module receiving and interpreting data from the EGT Sensor 4 can also cause the code to appear.
  4. Exhaust System Leaks: Any leaks in the exhaust system can lead to higher exhaust gas temperatures, triggering the high voltage reading.
  5. DPF System Blockage: A blocked or clogged diesel particulate filter can cause exhaust gas temperatures to rise, resulting in the P2471 code.

Symptoms of P2471 2016 Chevrolet Silverado

  1. Check Engine Light: The most common symptom associated with the P2471 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Power: The vehicle may experience a decrease in engine power, leading to sluggish acceleration and overall performance.
  3. Increased Fuel Consumption: High exhaust gas temperatures can result in increased fuel consumption as the engine works harder to maintain proper temperature levels.
  4. Rough Idle: The engine may exhibit rough idling or shaking when the EGT Sensor 4 Circuit is registering high voltage.
  5. Emission Issues: The vehicle may fail emissions tests due to the increased emissions caused by high exhaust gas temperatures.

How to Fix P2471 2016 Chevrolet Silverado

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the exact cause of the high voltage reading from the EGT Sensor 4.
  2. Inspect EGT Sensor 4: Check the EGT Sensor 4 for any visible damage or signs of malfunction. Replace the sensor if necessary.
  3. Check Wiring: Inspect the wiring harness connected to the EGT Sensor 4 for any damage, corrosion, or loose connections. Repair or replace the wiring as needed.
  4. Test ECM Communication: Verify that the engine control module is receiving accurate data from the EGT Sensor 4 and that there are no communication issues.
  5. Clear Codes and Test Drive: After making the necessary repairs, clear the DTCs from the ECM and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P2471 2016 Chevrolet Silverado

The typical repair costs for addressing the P2471 code in a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of replacing a faulty EGT Sensor 4 can range from $100 to $200, including parts and labor. If wiring repairs or ECM diagnostics are needed, additional costs may apply. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and the extent of the repairs needed can also impact the overall cost. For a more accurate estimate, it is recommended to consult with a local auto repair shop.

What does this mean?

Tech Notes for P2471 2016 Chevrolet Silverado

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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2471 in a 2016 Chevrolet Silverado?

The common symptoms of code P2471 include the Check Engine Light illuminating on the dashboard, reduced engine power, and potential issues with the exhaust gas temperature sensor readings.

2. What causes the OBDII code P2471 in a 2016 Chevrolet Silverado?

The most common cause of code P2471 in a 2016 Chevrolet Silverado is a malfunction in Exhaust Gas Temperature Sensor 4, leading to high voltage in the circuit.

3. How serious is the OBDII code P2471 in a 2016 Chevrolet Silverado?

While the vehicle may still be operable with code P2471, it is important to address the issue promptly to prevent potential damage to the engine or emissions system.

4. Can I continue to drive my 2016 Chevrolet Silverado with OBDII code P2471?

It is not recommended to continue driving the vehicle with code P2471, as it may lead to reduced engine performance and could potentially cause further damage if left unresolved.

5. How can I diagnose OBDII code P2471 in my 2016 Chevrolet Silverado?

Diagnosing code P2471 involves using a diagnostic scanner to retrieve the specific fault codes, testing the Exhaust Gas Temperature Sensor 4, and inspecting the related wiring and connectors for any issues.

6. What are the repair options for OBDII code P2471 in a 2016 Chevrolet Silverado?

Repair options for code P2471 may include replacing the faulty Exhaust Gas Temperature Sensor 4, repairing any damaged wiring or connectors, or addressing any underlying issues that may have caused the high voltage in the circuit.

7. Can I clear OBDII code P2471 in my 2016 Chevrolet Silverado with a simple reset?

While clearing the code may temporarily turn off the Check Engine Light, it is crucial to address the underlying issue causing code P2471 to prevent it from reoccurring.

8. How much does it cost to repair OBDII code P2471 in a 2016 Chevrolet Silverado?

The cost of repairing code P2471 can vary depending on the specific cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is recommended to consult with a mechanic for an accurate estimate.

9. Are there any DIY tips for troubleshooting OBDII code P2471 in my 2016 Chevrolet Silverado?

While some basic troubleshooting steps can be taken, diagnosing and repairing code P2471 often requires specialized tools and expertise. It is advisable to seek professional help for accurate diagnosis and repair.

10. How can I prevent OBDII code P2471 from occurring in my 2016 Chevrolet Silverado in the future?

Regular maintenance, such as checking and replacing sensors as recommended by the manufacturer, can help prevent issues like code P2471 from occurring. Additionally, driving habits and avoiding rough driving conditions can contribute to the longevity of the vehicle's components.

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