AutoCodes – GMC – P2272 2016 GMC Sierra

P2272 2016 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 2016 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 284

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 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 does not detect an HO2S voltage greater than 800 mV before accumulated mass airflow exceeds a calibrated value.

OBDII Code P2272 2016 GMC Sierra - HO2S Signal Stuck Lean Bank 2 Sensor 2 - AutoCodes.com — P2272 2016 GMC Sierra Code - HO2S Signal Stuck Lean Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P2272 2016 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 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 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 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.

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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 2016 GMC Sierra Code

1. What does OBDII code P2272 mean for a 2016 GMC Sierra?

This code indicates a problem with the HO2S (Heated Oxygen Sensor) signal being stuck lean on Bank 2 Sensor 2 in your GMC Sierra.

2. What are the common symptoms of OBDII code P2272 on a 2016 GMC Sierra?

Common symptoms include poor fuel efficiency, rough idling, engine misfires, and the illumination of the Check Engine light.

3. What are the possible causes of OBDII code P2272 on a 2016 GMC Sierra?

Potential causes include a faulty HO2S sensor, exhaust leaks, engine vacuum leaks, fuel system issues, wiring problems, or a malfunctioning PCM (Powertrain Control Module).

4. How can I diagnose OBDII code P2272 on my 2016 GMC Sierra?

To diagnose this code, you can perform a visual inspection for damaged wiring, check for exhaust or vacuum leaks, test the HO2S sensor, and use a scan tool to monitor sensor readings.

5. Can OBDII code P2272 on a 2016 GMC Sierra cause engine damage?

While the code itself may not directly cause engine damage, ignoring it can lead to decreased performance and potential long-term issues with the vehicle's fuel system.

6. How can I repair OBDII code P2272 on my 2016 GMC Sierra?

Repair options include replacing the faulty HO2S sensor, fixing any leaks in the exhaust or vacuum system, repairing or replacing damaged wiring, and clearing the code with a scan tool.

7. Is it safe to continue driving with OBDII code P2272 on a 2016 GMC Sierra?

It is generally not recommended to drive with this code active, as it can affect the vehicle's performance and fuel efficiency. It's best to address the issue promptly.

8. Will OBDII code P2272 on a 2016 GMC Sierra cause the vehicle to fail emissions tests?

Yes, having this code active can cause your vehicle to fail emissions tests due to improper oxygen sensor readings and potential issues with the fuel system.

9. How much does it typically cost to repair OBDII code P2272 on a 2016 GMC Sierra?

The cost of repairs can vary depending on the underlying cause of the code, but it may range from $100 to $500 or more, including parts and labor.

10. Can I clear OBDII code P2272 on a 2016 GMC Sierra without fixing the underlying issue?

Clearing the code without addressing the root cause is not recommended, as the issue will likely persist and may lead to further problems down the line.