AutoCodes – GMC – P2470 2015 GMC Sierra

P2470 2015 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 2015 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 158

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 2015 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 2015 GMC Sierra - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage - AutoCodes.com — P2470 2015 GMC Sierra Code - Exhaust Gas Temperature Sensor 4 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2470 2015 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 2015 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 2015 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 2015 GMC Sierra code?

Need more information on how to fix the P2470 2015 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 2015 GMC Sierra Code

What does the OBDII code P2470 mean on a 2015 GMC Sierra?

P2470 indicates a low voltage issue in the circuit of Exhaust Gas Temperature (EGT) Sensor 4, which monitors the temperature of exhaust gases in the emissions system.

What are the symptoms of code P2470 on a 2015 GMC Sierra?

Common symptoms include an illuminated Check Engine Light, reduced fuel efficiency, possible limp mode activation, and increased exhaust emissions.

What causes the P2470 code to appear on a 2015 GMC Sierra?

Possible causes include a faulty EGT sensor, damaged wiring or connectors, a short or open circuit, or issues with the vehicleâ€™s PCM (Powertrain Control Module).

How do I diagnose the P2470 code on my GMC Sierra?

Inspect the wiring and connectors for damage or corrosion, test the EGT sensor with a multimeter, and check for any related trouble codes that might pinpoint the source of the problem.

Can I drive my 2015 GMC Sierra with the P2470 code?

Driving with code P2470 is not recommended as it could lead to increased emissions, reduced performance, or further damage to the emissions system.

How do I fix the P2470 code on a 2015 GMC Sierra?

Repairs may include replacing the EGT sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

How much does it cost to repair a P2470 code on a GMC Sierra?

Costs can vary, but replacing an EGT sensor typically ranges from $150 to $300, including parts and labor. Additional repairs may increase costs.

Can a bad EGT sensor lead to other problems in my truck?

Yes, a malfunctioning EGT sensor can affect emissions control, engine performance, and potentially cause damage to the catalytic converter or diesel particulate filter (DPF) over time.

How can I prevent the P2470 code from occurring again?

Regular maintenance, including inspecting wiring and connectors for damage, keeping the exhaust system clean, and addressing Check Engine Light warnings promptly, can help prevent recurrence.

Does clearing the code with a scanner fix the P2470 issue?

Clearing the code may temporarily turn off the Check Engine Light, but it wonâ€™t resolve the underlying issue causing the P2470 code. Proper diagnosis and repair are necessary.