AutoCodes – Chevrolet – P2273 2017 Chevrolet Silverado

P2273 2017 Chevrolet Silverado Code - HO2S Signal Stuck Rich 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: P2273 2017 Chevrolet Silverado indicates HO2S Signal Stuck Rich 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 258

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 P2273 2017 Chevrolet Silverado 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 less than 100 mV before accumulated mass airflow exceeds a calibrated value.

OBDII Code P2273 2017 Chevrolet Silverado - HO2S Signal Stuck Rich Bank 2 Sensor 2 - AutoCodes.com — P2273 2017 Chevrolet Silverado Code - HO2S Signal Stuck Rich Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P2273 2017 Chevrolet Silverado?

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 P2273 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

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 P2273 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.

Need more information about the P2273 2017 Chevrolet Silverado code?

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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 P2273 2017 Chevrolet Silverado Code

1. What does the OBDII code P2273 on a 2017 Chevrolet Silverado mean?

The code P2273 indicates a problem with the HO2S (Heated Oxygen Sensor) signal being stuck rich on Bank 2 Sensor 2 in the exhaust system of the vehicle.

2. What are the common symptoms of OBDII code P2273 in a 2017 Chevrolet Silverado?

Common symptoms of code P2273 include poor fuel economy, rough idling, engine hesitation, and potentially increased emissions.

3. What are the possible causes of the HO2S signal being stuck rich on Bank 2 Sensor 2 in a 2017 Chevrolet Silverado?

Possible causes of P2273 can include a faulty oxygen sensor, issues with the fuel injection system, vacuum leaks, exhaust leaks, or a problem with the engine's air intake system.

4. How can I diagnose the OBDII code P2273 in my 2017 Chevrolet Silverado?

Diagnosing code P2273 typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor wiring and connections, checking for leaks in the exhaust system, and testing the sensor's voltage output.

5. Can I continue driving my 2017 Chevrolet Silverado with the P2273 code?

It is not recommended to continue driving with the P2273 code as it can lead to poor engine performance and potentially damage the catalytic converter over time.

6. How do I repair the HO2S signal stuck rich Bank 2 Sensor 2 code on my 2017 Chevrolet Silverado?

Repairs for P2273 may involve replacing the Bank 2 Sensor 2 oxygen sensor, addressing any fuel system issues, fixing vacuum or exhaust leaks, or cleaning/replacing the air intake system components.

7. Will resetting the OBDII code P2273 on my 2017 Chevrolet Silverado make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P2273 is not addressed, the code is likely to return.

8. How much does it cost to fix the OBDII code P2273 on a 2017 Chevrolet Silverado?

The cost of fixing P2273 can vary depending on the specific cause of the issue, but it may involve parts and labor costs for replacing the oxygen sensor or addressing other related components.

9. Can a DIY enthusiast repair the P2273 code on a 2017 Chevrolet Silverado?

Depending on their skill level, a DIY enthusiast may be able to address the P2273 code by replacing the oxygen sensor or checking for leaks, but more complex issues may require professional assistance.

10. How often does the OBDII code P2273 occur in a 2017 Chevrolet Silverado?

The occurrence of P2273 can vary based on factors such as vehicle maintenance, driving conditions, and the overall health of the engine and emissions system in the 2017 Chevrolet Silverado.