AutoCodes – GMC – P2272 2015 GMC Sierra

P2272 2015 GMC Sierra Code - HO2S Signal Stuck Lean Bank 2 Sensor 2

Quick Answer

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 Sensor 2 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: P2272 2015 GMC Sierra indicates HO2S Signal Stuck Lean Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Bank 2 Sensor 2, Heated Oxygen Bank 2 Sensor 2 harness is open or shorted, Heated Oxygen Bank 2 Sensor 2 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 183

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 28, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P2272 2015 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 does not detect an HO2S voltage greater than 800 mV before accumulated mass airflow exceeds a calibrated value.

OBDII Code P2272 2015 GMC Sierra - HO2S Signal Stuck Lean Bank 2 Sensor 2 - AutoCodes.com — P2272 2015 GMC Sierra Code - HO2S Signal Stuck Lean Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P2272 2015 GMC Sierra?

Faulty Heated Oxygen Bank 2 Sensor 2
Heated Oxygen Bank 2 Sensor 2 harness is open or shorted
Heated Oxygen Bank 2 Sensor 2 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 P2272 2015 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 Rear Heated Oxygen Sensors (HO2S) usually takes care of the problem.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2272 2015 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 P2272 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P2272 in a 2015 GMC Sierra?

- Common symptoms include poor fuel economy, rough idling, loss of power, and the illumination of the Check Engine Light.

2. What does the OBDII code P2272 "HO2S Signal Stuck Lean Bank 2 Sensor 2" mean for a 2015 GMC Sierra?

- This code indicates that the downstream oxygen sensor on bank 2 is detecting a consistently lean air-fuel mixture.

3. What are the possible causes of OBDII code P2272 in a 2015 GMC Sierra?

- Potential causes include a faulty oxygen sensor, vacuum leaks, exhaust leaks, fuel system issues, or a malfunctioning catalytic converter.

4. How can I diagnose the OBDII code P2272 in my 2015 GMC Sierra?

- Diagnosing this code typically involves inspecting the oxygen sensor, checking for leaks in the intake or exhaust system, and verifying proper fuel system operation using a scan tool.

5. Can driving with the OBDII code P2272 in a 2015 GMC Sierra cause further damage?

- Continuing to drive with this code may lead to reduced fuel efficiency, potential damage to the catalytic converter, and increased emissions.

6. How can I repair OBDII code P2272 in my 2015 GMC Sierra?

- Repair methods may include replacing the faulty oxygen sensor, fixing any vacuum or exhaust leaks, addressing fuel system issues, or replacing a malfunctioning catalytic converter.

7. Is it safe to continue driving my 2015 GMC Sierra with the Check Engine Light on due to code P2272?

- While the vehicle may still be operable, it is advisable to address the underlying issue causing the code to prevent potential damage and ensure optimal performance.

8. Can I reset the Check Engine Light caused by OBDII code P2272 in my 2015 GMC Sierra?

- You can reset the Check Engine Light using an OBDII scanner, but it is recommended to diagnose and repair the underlying issue first to prevent the light from coming back on.

9. How much does it cost to fix OBDII code P2272 in a 2015 GMC Sierra?

- The cost of fixing this code can vary depending on the specific cause. Expenses may include the price of parts like oxygen sensors or catalytic converters, labor costs, and diagnostic fees.

10. How often does OBDII code P2272 occur in 2015 GMC Sierra vehicles?

- While the frequency of this code can vary, it is relatively uncommon compared to more prevalent codes like those related to oxygen sensor failures or misfires.