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P2470 2016 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage

Quick Answer

The P2470 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Exhaust Gas Temperature (EGT) Sensor 4 Circuit, specifically detecting low voltage. Common causes include Faulty EGT Sensor: The sensor itself may be malfunctioning, providing inaccurate temperature readings to the ECM, Wiring Issues: Corroded, damaged, or loose wiring connections between the EGT Sensor and ECM can cause low voltage readings, ECM Malfunction: A problem with the engine control module could also be the cause of the low voltage detected in the EGT Sensor circuit. 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
P2470 2016 GMC Sierra indicates Exhaust Gas Temperature Sensor 4 Circuit Low Voltage.
Common causes
Common causes include Faulty EGT Sensor: The sensor itself may be malfunctioning, providing inaccurate temperature readings to the ECM, Wiring Issues: Corroded, damaged, or loose wiring connections between the EGT Sensor and ECM can cause low voltage readings, ECM Malfunction: A problem with the engine control module could also be the cause of the low voltage detected in the EGT Sensor circuit.
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 12, 2024
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Code P2470 2016 GMC Sierra Description

The P2470 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Exhaust Gas Temperature (EGT) Sensor 4 Circuit, specifically detecting low voltage. The EGT Sensor is a crucial component in modern diesel engines, as it measures the temperature of the exhaust gases. This information is essential for the engine control module (ECM) to regulate fuel injection timing, exhaust gas recirculation (EGR) flow, and regeneration of the diesel particulate filter (DPF), among other functions.

OBDII Code P2470 2016 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage
P2470 2016 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage

Common Causes of P2470 2016 GMC Sierra

  1. Faulty EGT Sensor: The sensor itself may be malfunctioning, providing inaccurate temperature readings to the ECM.
  2. Wiring Issues: Corroded, damaged, or loose wiring connections between the EGT Sensor and ECM can cause low voltage readings.
  3. ECM Malfunction: A problem with the engine control module could also be the cause of the low voltage detected in the EGT Sensor circuit.
  4. Exhaust System Leak: A leak in the exhaust system before the EGT Sensor can lead to incorrect temperature readings.
  5. Poor Electrical Ground: A weak or compromised electrical ground connection can also result in low voltage in the EGT Sensor circuit.

Symptoms of P2470 2016 GMC Sierra

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Engine Power: The vehicle may experience a decrease in engine power or responsiveness, especially during acceleration.
  3. Poor Fuel Economy: Low voltage in the EGT Sensor can lead to inefficient fuel combustion, resulting in decreased fuel economy.
  4. Increased Emissions: The vehicle may fail emissions tests or emit higher levels of pollutants due to improper temperature readings.

How to Fix P2470 2016 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the EGT Sensor circuit, including the sensor itself, wiring, and connections.
  2. Replace EGT Sensor: If the sensor is found to be faulty, replace it with a new one following the manufacturer's specifications.
  3. Check Wiring: Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as necessary.
  4. Test ECM: Verify the functionality of the engine control module to ensure it is not causing the low voltage issue in the EGT Sensor circuit.
  5. Clear Codes and Test Drive: After completing the repair, clear the DTCs from the ECM memory, and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P2470 2016 GMC Sierra

The typical repair costs for addressing a P2470 code related to the EGT Sensor 4 Circuit low voltage issue in a 2016 GMC Sierra can vary depending on the specific components that need to be replaced or repaired. On average, the parts cost for a new EGT Sensor ranges from $100 to $200, while the labor costs can amount to approximately $100 to $200. Therefore, the total repair cost may fall within the range of $200 to $400, excluding any diagnostic fees or additional repairs that may be required. It is important to note that labor rates at auto repair shops can vary, so it is advisable to inquire about specific rates in your area for a more accurate estimate.

What does this mean?

Tech Notes for P2470 2016 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 P2470 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P2470 in a 2016 GMC Sierra?

The common symptoms of OBDII code P2470 include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What does the Exhaust Gas Temperature Sensor 4 Circuit Low Voltage mean in a GMC Sierra?

The code P2470 indicates that the Exhaust Gas Temperature Sensor 4 circuit is reporting a low voltage condition, which can affect the proper functioning of the emissions control system.

3. What are the possible causes of OBDII code P2470 in a 2016 GMC Sierra?

Possible causes of code P2470 include a faulty Exhaust Gas Temperature Sensor 4, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

4. How can I diagnose the cause of OBDII code P2470 in my GMC Sierra?

Diagnosing code P2470 typically involves inspecting the Exhaust Gas Temperature Sensor 4 and its wiring for any visible damage, testing the sensor's voltage output, and checking for any related trouble codes.

5. Can I continue driving my GMC Sierra with OBDII code P2470?

It is not recommended to continue driving your GMC Sierra with code P2470, as it can lead to further damage to the emissions system and potentially affect the vehicle's performance.

6. How can I repair OBDII code P2470 in my 2016 GMC Sierra?

Repairing code P2470 may involve replacing the Exhaust Gas Temperature Sensor 4, repairing any damaged wiring or connectors, or reprogramming the engine control module to address the low voltage issue.

7. Is it possible to reset OBDII code P2470 in a GMC Sierra without fixing the underlying issue?

While you can clear the code temporarily, it is important to address the underlying issue causing code P2470 to prevent further problems and ensure the proper functioning of your vehicle's emissions system.

8. How much does it cost to repair OBDII code P2470 in a 2016 GMC Sierra?

The cost of repairing code P2470 can vary depending on the specific cause of the issue, but it may involve parts and labor expenses ranging from $100 to $300 or more.

9. Can a DIY enthusiast fix OBDII code P2470 in a GMC Sierra?

Depending on your mechanical skills and access to tools, a DIY enthusiast may be able to address code P2470 by replacing the Exhaust Gas Temperature Sensor 4 or repairing damaged wiring, but professional diagnosis and repair are recommended for accurate resolution.

10. Will OBDII code P2470 cause my GMC Sierra to fail an emissions test?

Yes, code P2470 can cause your GMC Sierra to fail an emissions test due to the malfunction in the Exhaust Gas Temperature Sensor 4 circuit, which is crucial for emissions control and compliance.

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