AutoCodes – GMC – P0031 2017 GMC Sierra

P0031 2017 GMC Sierra Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor Bank 1 Sensor 1 harness is open shorted to ground, Heated Oxygen Sensor Bank 1 Sensor 1 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: P0031 2017 GMC Sierra indicates HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1, Heated Oxygen Sensor Bank 1 Sensor 1 harness is open shorted to ground, Heated Oxygen Sensor Bank 1 Sensor 1 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 235

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 Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0031 2017 GMC Sierra Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.

OBDII Code P0031 2017 GMC Sierra - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1 - AutoCodes.com — P0031 2017 GMC Sierra Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0031 2017 GMC Sierra?

Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
Heated Oxygen Sensor Bank 1 Sensor 1 harness is open shorted to ground
Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 1 Sensor 1 circuit fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0031 2017 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

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0031 2017 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.

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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 P0031 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P0031 on a 2017 GMC Sierra?

The common symptoms of code P0031 include poor fuel economy, rough idling, stalling, and the illumination of the Check Engine Light.

2. What does the OBDII code P0031 "HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1" mean for a 2017 GMC Sierra?

This code indicates that there is a low voltage condition in the heater control circuit of the oxygen sensor (O2 sensor) located in Bank 1 Sensor 1 of the exhaust system.

3. What are the possible causes of OBDII code P0031 on a 2017 GMC Sierra?

Common causes of code P0031 include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or a malfunctioning PCM (Powertrain Control Module).

4. How can I diagnose and repair OBDII code P0031 on my 2017 GMC Sierra?

To diagnose and repair code P0031, you can start by checking the wiring and connectors for any damage, testing the oxygen sensor for proper operation, inspecting the fuse related to the sensor circuit, and ensuring the PCM is functioning correctly.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P0031?

It is not recommended to continue driving your vehicle with code P0031 present, as it can lead to poor engine performance and potential damage to the catalytic converter over time.

6. How much does it typically cost to repair OBDII code P0031 on a 2017 GMC Sierra?

The cost of repairing code P0031 can vary depending on the root cause of the issue. In general, repairing or replacing an oxygen sensor can cost between $200 to $400, while addressing wiring or fuse issues may cost less.

7. Can I clear the OBDII code P0031 on my 2017 GMC Sierra with a simple reset?

While clearing the code with a reset may temporarily turn off the Check Engine Light, it will not fix the underlying issue causing code P0031. It's important to diagnose and repair the problem to prevent it from recurring.

8. How often should the oxygen sensors be replaced on a 2017 GMC Sierra to prevent OBDII code P0031?

Oxygen sensors typically have a lifespan of around 60,000 to 100,000 miles. It is recommended to follow the manufacturer's maintenance schedule and replace the sensors as needed to avoid issues like code P0031.

9. Are there any DIY tips for troubleshooting OBDII code P0031 on a 2017 GMC Sierra?

DIY tips for troubleshooting code P0031 include visually inspecting the sensor and its wiring, checking the fuse related to the sensor circuit, and using an OBDII scanner to monitor sensor data for abnormalities.

10. How soon should I address OBDII code P0031 on my 2017 GMC Sierra to prevent further damage?

It is advisable to address code P0031 as soon as possible to prevent potential damage to the engine and emissions system of your 2017 GMC Sierra. Delaying repairs can lead to more severe issues and higher repair costs.