AutoCodes – GMC – P2470 GMC

P2470 GMC 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 GMC 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 1,832

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

What does this mean?

What are the Possible Causes of the DTC P2470 GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P2470 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2470 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P2470 2014 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit Low Voltage
P2470 2015 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit Low Voltage
P2470 2016 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit Low Voltage
P2470 2017 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit Low Voltage
P2470 2018 GMC Sierra — Exhaust Gas Temperature Sensor 4 Circuit Low Voltage

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 GMC Code

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

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

2. What are the possible causes of OBDII code P2470 GMC?

Possible causes of code P2470 include a faulty exhaust gas temperature sensor, damaged wiring or connectors associated with the sensor, or issues with the engine control module (ECM).

3. How serious is OBDII code P2470 GMC?

While code P2470 may not cause immediate harm to the vehicle, it can lead to long-term engine damage if left unresolved. It is recommended to address the issue promptly to prevent further complications.

4. How can I diagnose OBDII code P2470 GMC?

Diagnosing code P2470 typically involves using an OBDII scanner to retrieve the code, inspecting the exhaust gas temperature sensor and its related components, and testing the sensor's voltage readings.

5. Can I drive with OBDII code P2470 GMC activated?

It is generally not recommended to drive with code P2470 active, as it can affect the engine's performance and fuel efficiency. It is best to address the issue before continuing to drive the vehicle.

6. How can I repair OBDII code P2470 GMC?

Repairing code P2470 may involve replacing the faulty exhaust gas temperature sensor, repairing or replacing damaged wiring or connectors, and resetting the ECM to clear the code.

7. Can a DIY enthusiast fix OBDII code P2470 GMC?

Depending on their skill level, a DIY enthusiast may be able to address code P2470 by replacing the exhaust gas temperature sensor and conducting basic wiring checks. However, professional help is recommended for accurate diagnosis and repair.

8. How much does it cost to repair OBDII code P2470 GMC at a mechanic?

The repair cost for code P2470 can vary depending on the root cause of the issue, the labor rates of the mechanic, and the cost of the replacement parts. It is advisable to obtain quotes from multiple mechanics for comparison.

9. Will resetting the check engine light resolve OBDII code P2470 GMC?

Simply resetting the check engine light without addressing the underlying issue causing code P2470 will not resolve the problem. The root cause of the code must be diagnosed and repaired to prevent it from reoccurring.

10. How often does OBDII code P2470 GMC occur in GMC vehicles?

While the frequency of code P2470 can vary, it has been reported as a relatively common issue in certain GMC vehicles, particularly those with exhaust gas temperature sensor 4 circuit problems. Regular maintenance and timely repairs can help prevent this code from occurring.