AutoCodes – Chevrolet – P0031 2015 Chevrolet Silverado

P0031 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 426

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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1 - AutoCodes.com — P0031 2015 Chevrolet Silverado Code - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0031 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado?

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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado Code

1. What does OBDII code P0031 on a 2015 Chevrolet Silverado mean?

The code P0031 indicates a malfunction in the HO2S (Heated Oxygen Sensor) heater control circuit for Bank 1 Sensor 1, specifically low voltage detected.

2. What are common symptoms of OBDII code P0031 on a 2015 Chevrolet Silverado?

Common symptoms of P0031 may include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light on the dashboard.

3. What can cause the OBDII code P0031 to trigger on a 2015 Chevrolet Silverado?

Possible causes of P0031 include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse related to the sensor heater, or an issue with the engine control module.

4. How serious is the OBDII code P0031 on a 2015 Chevrolet Silverado?

While the vehicle may still operate with the P0031 code present, it is important to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

5. How can I diagnose and repair OBDII code P0031 on my 2015 Chevrolet Silverado?

Diagnosing P0031 involves testing the oxygen sensor heater circuit, inspecting wiring and connectors, checking for blown fuses, and verifying the sensor's functionality. Repair typically involves replacing the faulty oxygen sensor or repairing damaged wiring.

6. Can I drive my 2015 Chevrolet Silverado with the OBDII code P0031?

It is generally safe to drive your vehicle with the P0031 code, but it is recommended to have the issue diagnosed and repaired as soon as possible to avoid potential long-term damage and ensure optimal engine performance.

7. Will resetting the Check Engine Light fix the OBDII code P0031 on my 2015 Chevrolet Silverado?

Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue causing P0031 is not addressed, the code is likely to reappear once the vehicle's systems run diagnostic tests again.

8. How much does it cost to repair OBDII code P0031 on a 2015 Chevrolet Silverado?

The cost of repairing P0031 can vary depending on the exact cause of the issue. Typically, the cost includes the price of a new oxygen sensor, labor for installation, and any additional parts or repairs needed.

9. Are there any DIY tips for fixing OBDII code P0031 on a 2015 Chevrolet Silverado?

While diagnosing and repairing P0031 may require some automotive knowledge and tools, simple steps like checking for loose wiring connections, inspecting fuses, and ensuring proper sensor installation can be DIY-friendly.

10. How often does OBDII code P0031 occur in 2015 Chevrolet Silverado vehicles?

The occurrence of P0031 can vary among 2015 Chevrolet Silverado vehicles, with factors such as driving conditions, maintenance history, and overall vehicle health influencing the likelihood of this specific code being triggered.