AutoCodes – GMC – P0131 2016 GMC Sierra

P0131 2016 GMC Sierra Code - HO2S Circuit Low Voltage Bank 1 Sensor 1

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Front Heated Oxygen Sensor (HO2S) Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front Heated Oxygen Sensor Bank 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: P0131 2016 GMC Sierra indicates HO2S Circuit Low Voltage Bank 1 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor (HO2S) Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front Heated Oxygen Sensor Bank 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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 262

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 May 26, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0131 2016 GMC Sierra Description

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the Engine Control Module (ECM) operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0 - 1, 000 mV. Once sufficient HO2S voltage fluctuation is observed by the ECM, Closed Loop is entered. The ECM uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1, 000 mV indicates a rich fuel mixture. An HO2S voltage that decreases toward 0 mV indicates a lean fuel mixture.
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the heated oxygen sensor is shorted to ground if the HO2S voltage is less than 50 mV.

OBDII Code P0131 2016 GMC Sierra - HO2S Circuit Low Voltage Bank 1 Sensor 1 - AutoCodes.com — P0131 2016 GMC Sierra Code - HO2S Circuit Low Voltage Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0131 2016 GMC Sierra?

Faulty Front Heated Oxygen Sensor (HO2S) Bank 1
Front Heated Oxygen Sensor Bank 1 harness is open or shorted
Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
Low or high fuel system pressure
Fuel contamination
Faulty fuel injectors
Exhaust gas leaks
Engine vacuum leaks

How to Fix the DTC P0131 2016 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

Replacing the Front Heated Oxygen Sensor (HO2S) Bank 1 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0131 2016 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 P0131 2016 GMC Sierra code?

Need more information on how to fix the P0131 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0131 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P0131 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0131 on a 2016 GMC Sierra?

- Common symptoms include poor fuel economy, rough idling, engine hesitation, and the illumination of the Check Engine light.

2. What does the OBDII code P0131 "HO2S Circuit Low Voltage Bank 1 Sensor 1" mean for a 2016 GMC Sierra?

- This code indicates that there is a low voltage condition in the oxygen sensor circuit of the bank 1, sensor 1 in the exhaust system.

3. What are some possible causes of OBDII code P0131 on a 2016 GMC Sierra?

- Potential causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, and issues with the engine's fuel system.

4. How can I diagnose the OBDII code P0131 on my 2016 GMC Sierra?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the sensor's voltage output.

5. Can I continue driving my 2016 GMC Sierra with OBDII code P0131?

- It is generally not recommended to drive the vehicle with this code present, as it can lead to decreased fuel efficiency and potentially cause damage to the catalytic converter over time.

6. How can I repair OBDII code P0131 on a 2016 GMC Sierra?

- Repair options may include replacing the oxygen sensor, repairing or replacing damaged wiring, fixing any exhaust leaks, and ensuring proper functioning of the fuel system components.

7. Will resetting the OBDII code P0131 on my 2016 GMC Sierra make it go away permanently?

- Resetting the code may temporarily turn off the Check Engine light, but if the underlying issue causing the code is not addressed, it is likely to reoccur.

8. How much does it cost to fix OBDII code P0131 on a 2016 GMC Sierra?

- The cost of fixing this code can vary depending on the specific issue causing it, but it may involve expenses for parts, labor, and diagnostic services.

9. Are there any maintenance tips to prevent OBDII code P0131 from appearing on a 2016 GMC Sierra?

- Regular maintenance of the vehicle, including timely replacement of oxygen sensors and ensuring the exhaust system is in good condition, can help prevent this code from occurring.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P0131 on a 2016 GMC Sierra?

- Depending on the specific cause of the code, a DIY enthusiast with some automotive knowledge may be able to address issues like replacing the oxygen sensor or repairing simple wiring problems.