AutoCodes – Chevrolet – P0031 2017 Chevrolet Silverado

P0031 2017 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 2017 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 423

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 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 2017 Chevrolet Silverado - HO2S Heater Control Circuit Low Voltage Bank 1 Sensor 1 - AutoCodes.com — P0031 2017 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 2017 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 2017 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 2017 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 2017 Chevrolet Silverado Code

1. What does OBDII code P0031 on a 2017 Chevrolet Silverado mean?

The code P0031 indicates a potential issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit having low voltage on Bank 1 Sensor 1.

2. What are the common symptoms of OBDII code P0031 on a 2017 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 are the possible causes of OBDII code P0031 on a 2017 Chevrolet Silverado?

Potential causes of P0031 include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse related to the sensor, or issues with the engine control module (ECM).

4. How can I diagnose the OBDII code P0031 on a 2017 Chevrolet Silverado?

To diagnose P0031, you may need to perform a visual inspection of the sensor and its wiring, check for continuity in the circuit, test the sensor's resistance, and scan the ECM for further diagnostic trouble codes.

5. Can I continue to drive my 2017 Chevrolet Silverado with OBDII code P0031?

It is generally not recommended to drive with a P0031 fault code, as it can lead to decreased fuel efficiency and potential engine performance issues. It's best to address the problem promptly.

6. How can I repair OBDII code P0031 on a 2017 Chevrolet Silverado?

Repairing P0031 may involve replacing the Bank 1 Sensor 1 oxygen sensor, repairing damaged wiring or connectors, checking and replacing any blown fuses, and clearing the fault code with a diagnostic tool.

7. Are there any tips to prevent OBDII code P0031 from appearing on my 2017 Chevrolet Silverado?

Regular maintenance, such as keeping up with scheduled tune-ups, inspecting the oxygen sensor regularly, and avoiding driving with a malfunctioning sensor, can help prevent the recurrence of P0031.

8. Is it safe to reset the check engine light after fixing OBDII code P0031 on a 2017 Chevrolet Silverado?

Yes, it is safe to reset the check engine light after resolving P0031. This can be done using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the stored fault code.

9. How much does it cost to repair OBDII code P0031 on a 2017 Chevrolet Silverado?

The cost of repairing P0031 can vary depending on the exact cause of the issue, the labor rates of the repair shop, and the cost of parts. It's recommended to get quotes from different mechanics for an accurate estimate.

10. Can a DIY enthusiast fix OBDII code P0031 on a 2017 Chevrolet Silverado?

While some individuals may have the skills to diagnose and repair P0031 themselves, working with electrical components and sensors can be complex. If you're unsure, it's best to consult with a professional mechanic for assistance.