AutoCodes – GMC – P2272 2014 GMC Sierra

P2272 2014 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 2014 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 259

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 2014 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 2014 GMC Sierra - HO2S Signal Stuck Lean Bank 2 Sensor 2 - AutoCodes.com — P2272 2014 GMC Sierra Code - HO2S Signal Stuck Lean Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P2272 2014 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 2014 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 2014 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 2014 GMC Sierra Code

1. What does OBDII code P2272 for a 2014 GMC Sierra mean?

The code P2272 indicates that the Heated Oxygen Sensor (HO2S) signal is stuck lean for Bank 2 Sensor 2 in the vehicle's exhaust system.

2. What are the common symptoms of OBDII code P2272 in a 2014 GMC Sierra?

Common symptoms of code P2272 may include poor fuel efficiency, rough idling, engine misfires, and the illumination of the check engine light on the dashboard.

3. What are the possible causes of OBDII code P2272 in a 2014 GMC Sierra?

Potential causes of code P2272 include a faulty HO2S sensor, wiring issues in the sensor circuit, vacuum leaks in the intake system, exhaust leaks, or issues with the fuel system.

4. How can I diagnose OBDII code P2272 in my 2014 GMC Sierra?

Diagnosing code P2272 typically involves using an OBDII scanner to read the code, inspecting the HO2S sensor for damage, checking the wiring for any faults, and conducting a thorough inspection of the intake and exhaust systems.

5. Can I continue to drive my 2014 GMC Sierra with OBDII code P2272?

It is not recommended to drive your vehicle with an unresolved P2272 code, as it can lead to potential engine performance issues and further damage if left unaddressed.

6. How can I repair OBDII code P2272 in my 2014 GMC Sierra?

Repairing code P2272 may involve replacing the faulty HO2S sensor, repairing any damaged wiring, fixing vacuum or exhaust leaks, and ensuring the fuel system is functioning correctly.

7. Is it possible to reset OBDII code P2272 in a 2014 GMC Sierra without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it is not recommended to do so without addressing the root cause, as the issue may persist and trigger the code again.

8. How much does it cost to fix OBDII code P2272 in a 2014 GMC Sierra?

The cost of repairing code P2272 can vary depending on the specific cause of the issue, but it may involve sensor replacement, wiring repairs, or fixing other components, which can range from moderate to high costs.

9. Can a DIY enthusiast fix OBDII code P2272 in a 2014 GMC Sierra?

DIY enthusiasts with automotive repair experience may be able to address code P2272 by following repair guides, but complex issues may require professional diagnosis and repair to ensure proper resolution.

10. How long does it take to repair OBDII code P2272 in a 2014 GMC Sierra?

The repair time for code P2272 can vary based on the extent of the issue and the availability of parts, but it may range from a few hours to a full day, depending on the complexity of the repair needed.