AutoCodes – GMC – P2470 2018 GMC Sierra

P2470 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit Low 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: P2470 2018 GMC Sierra indicates Exhaust Gas Temperature Sensor 4 Circuit Low 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 308

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 P2470 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 less than 158 Ω for greater than 2 s.

OBDII Code P2470 2018 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage - AutoCodes.com — P2470 2018 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2470 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 P2470 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 P2470 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 P2470 2018 GMC Sierra code?

Need more information on how to fix the P2470 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 P2470 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2470 (Exhaust Gas Temperature Sensor 4 Circuit Low Voltage) in a 2018 GMC Sierra?

- Common symptoms include reduced engine performance, increased fuel consumption, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P2470 in a 2018 GMC Sierra?

- The code P2470 can be triggered by issues such as a faulty exhaust gas temperature sensor, damaged wiring or connectors, or a problem with the sensor circuit.

3. How can I diagnose the OBDII code P2470 in a 2018 GMC Sierra?

- Diagnosis involves using a scan tool to read the code, inspecting the exhaust gas temperature sensor and its connections, and testing the sensor's voltage and resistance.

4. Can a faulty exhaust gas temperature sensor cause other issues besides triggering the P2470 code in a 2018 GMC Sierra?

- Yes, a faulty sensor can lead to incorrect temperature readings, affecting the engine's performance and potentially causing damage to components like the diesel particulate filter.

5. What are some repair tips for resolving OBDII code P2470 in a 2018 GMC Sierra?

- Repair tips include replacing the faulty exhaust gas temperature sensor, repairing any damaged wiring or connectors, and resetting the fault codes after completing the repairs.

6. Is it safe to continue driving a 2018 GMC Sierra with the OBDII code P2470 active?

- It is not recommended to drive the vehicle with the P2470 code active, as it can lead to reduced engine efficiency and potential damage to other components over time.

7. How much does it typically cost to repair OBDII code P2470 in a 2018 GMC Sierra?

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

8. Can a DIY enthusiast fix the OBDII code P2470 issue in a 2018 GMC Sierra?

- While some DIY enthusiasts may have the skills to replace the exhaust gas temperature sensor, diagnosing and repairing wiring or circuit issues may require professional assistance.

9. Will resetting the check engine light resolve the OBDII code P2470 temporarily in a 2018 GMC Sierra?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the P2470 code is not addressed, the light is likely to reappear.

10. How often should the exhaust gas temperature sensors be inspected in a 2018 GMC Sierra to prevent OBDII code P2470 from occurring?

- It is recommended to include the exhaust gas temperature sensors in regular vehicle maintenance checks, such as during scheduled services or if any related symptoms are noticed, to prevent the occurrence of the P2470 code.