AutoCodes – Chevrolet – P0031 2014 Chevrolet Silverado

P0031 2014 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 2014 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 582

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 2014 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 2014 Chevrolet Silverado - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1 - AutoCodes.com — P0031 2014 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 2014 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 2014 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 2014 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 2014 Chevrolet Silverado Code

1. What does the OBDII code P0031 for a 2014 Chevrolet Silverado mean?

The code P0031 on a 2014 Chevrolet Silverado indicates a problem with the HO2S (heated oxygen sensor) heater control circuit low voltage for Bank 1 Sensor 1.

2. What are the common symptoms of OBDII code P0031 on a 2014 Chevrolet Silverado?

Common symptoms of code P0031 may include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light on the dashboard.

3. What are the possible causes of OBDII code P0031 on a 2014 Chevrolet Silverado?

Possible causes of code P0031 include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse, or a problem with the vehicle's PCM (powertrain control module).

4. How can I diagnose the OBDII code P0031 on my 2014 Chevrolet Silverado?

Diagnosing code P0031 may involve visually inspecting the sensor and its connections, testing the sensor's heater circuit for continuity, checking for voltage at the sensor connector, and using a scan tool to monitor sensor data.

5. Can I continue driving my 2014 Chevrolet Silverado with OBDII code P0031?

While the vehicle may still be operable with code P0031, it is not recommended to ignore the issue. Continuing to drive with a malfunctioning oxygen sensor can lead to decreased fuel efficiency and potential damage to other engine components over time.

6. How can I repair OBDII code P0031 on my 2014 Chevrolet Silverado?

Repairing code P0031 may involve replacing the Bank 1 Sensor 1 oxygen sensor, repairing or replacing damaged wiring or connectors, checking and replacing any blown fuses, and resetting the trouble codes using a scan tool.

7. Is it possible to prevent OBDII code P0031 from appearing on my 2014 Chevrolet Silverado?

While some causes of code P0031 may be due to normal wear and tear, maintaining regular vehicle maintenance schedules, avoiding driving with a misfiring engine, and using quality fuel can help prevent premature sensor failures.

8. How much does it cost to repair OBDII code P0031 on a 2014 Chevrolet Silverado?

The cost of repairing code P0031 can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to do the repairs yourself or take the vehicle to a professional mechanic. Costs may range from $100 to $400 or more.

9. Can a DIY enthusiast fix OBDII code P0031 on a 2014 Chevrolet Silverado?

Depending on your skill level and access to tools, DIY enthusiasts may be able to diagnose and repair code P0031 themselves. However, working with electrical components and engine sensors can be complex, so it's recommended to proceed with caution and follow a repair manual or guide.

10. Will resetting the check engine light resolve OBDII code P0031 on a 2014 Chevrolet Silverado?

Simply resetting the check engine light without addressing the underlying issue causing code P0031 will not solve the problem. It's important to diagnose the root cause of the code and perform the necessary repairs to prevent it from reoccurring.