AutoCodes – Chevrolet – P0151 2017 Chevrolet Silverado

P0151 2017 Chevrolet Silverado Code - HO2S Circuit Low Voltage Bank 2 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 Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 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: P0151 2017 Chevrolet Silverado indicates HO2S Circuit Low Voltage Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 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 402

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 27, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0151 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 detects that the heated oxygen sensor is shorted to ground if the HO2S voltage is less than 50 mV.

OBDII Code P0151 2017 Chevrolet Silverado - HO2S Circuit Low Voltage Bank 2 Sensor 1 - AutoCodes.com — P0151 2017 Chevrolet Silverado Code - HO2S Circuit Low Voltage Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0151 2017 Chevrolet Silverado?

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 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 P0151 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 Front Heated Oxygen Sensor (HO2S) Bank 2 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0151 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 P0151 2017 Chevrolet Silverado code?

Need more information on how to fix the P0151 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P0151 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0151 on a 2017 Chevrolet Silverado?

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

2. What does the OBDII code P0151 "HO2S Circuit Low Voltage Bank 2 Sensor 1" mean on a 2017 Chevrolet Silverado?

- This code indicates a low voltage condition in the oxygen sensor (O2 sensor) circuit of Bank 2 Sensor 1 in the exhaust system.

3. What are the possible causes of OBDII code P0151 on a 2017 Chevrolet Silverado?

- Causes may include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, vacuum leaks, or issues with the engine's fuel system.

4. How can I diagnose the OBDII code P0151 on my 2017 Chevrolet Silverado?

- Diagnosing this code typically involves checking the oxygen sensor's wiring, connectors, and the sensor itself for any damage or malfunction using a diagnostic scanner.

5. Can I drive my 2017 Chevrolet Silverado with the OBDII code P0151?

- It is generally not recommended to drive with this code as it can lead to decreased fuel efficiency and potential engine performance issues.

6. How can I repair OBDII code P0151 on a 2017 Chevrolet Silverado?

- Repair options may include replacing the oxygen sensor, repairing damaged wiring or connectors, fixing exhaust leaks, addressing vacuum leaks, or troubleshooting the fuel system.

7. Is it possible to reset the OBDII code P0151 on a 2017 Chevrolet Silverado without fixing the underlying issue?

- While clearing the fault code can temporarily turn off the Check Engine Light, the code will likely reappear if the root cause is not addressed.

8. How much does it cost to fix OBDII code P0151 on a 2017 Chevrolet Silverado?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts and labor expenses for sensor replacement, wiring repairs, or other necessary fixes.

9. Can a DIY enthusiast repair OBDII code P0151 on a 2017 Chevrolet Silverado?

- Depending on the individual's skill level and access to tools, DIY repair of this code may be possible for tasks like sensor replacement or basic wiring checks. However, complex issues may require professional help.

10. How often does OBDII code P0151 occur in a 2017 Chevrolet Silverado?

- The occurrence of this code can vary based on driving conditions, maintenance history, and other factors, but it is relatively common in vehicles with oxygen sensor or related circuit issues.