AutoCodes – Chevrolet – P0051 2014 Chevrolet Silverado

P0051 2014 Chevrolet Silverado Code - HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 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: P0051 2014 Chevrolet Silverado indicates HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 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 446

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 Mar 25, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0051 2014 Chevrolet Silverado Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.

OBDII Code P0051 2014 Chevrolet Silverado - HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1 - AutoCodes.com — P0051 2014 Chevrolet Silverado Code - HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0051 2014 Chevrolet Silverado?

Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 2 Sensor 1 fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0051 2014 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

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0051 2014 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.

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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 P0051 2014 Chevrolet Silverado Code

1. What does the OBDII code P0051 on a 2014 Chevrolet Silverado mean?

- The code P0051 indicates a problem with the HO2S (Heated Oxygen Sensor) Heater Control Circuit Low Voltage for Bank 2 Sensor 1.

2. What are the common symptoms of OBDII code P0051 in a 2014 Chevrolet Silverado?

- Common symptoms include poor fuel economy, rough idling, stalling, or a noticeable decrease in engine performance.

3. What could cause the HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1 error code in a 2014 Chevrolet Silverado?

- Possible causes for P0051 include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the engine control module.

4. How can I diagnose the P0051 code on my 2014 Chevrolet Silverado?

- To diagnose P0051, you can use an OBDII scanner to retrieve the code, visually inspect the oxygen sensor and related wiring, and test the sensor's resistance and voltage.

5. Can I continue to drive my 2014 Chevrolet Silverado with the P0051 code present?

- It is not recommended to drive your vehicle with the P0051 code active, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. What is the typical repair process for fixing the HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1 issue on a 2014 Chevrolet Silverado?

- Repairs for P0051 may involve replacing the oxygen sensor, repairing damaged wiring or connectors, ensuring proper fuse functionality, or reprogramming the engine control module.

7. How much does it cost to repair the P0051 code on a 2014 Chevrolet Silverado?

- The cost of repairing the P0051 code can vary depending on the exact cause of the issue, but it may range from $100 to $400, including parts and labor.

8. Are there any DIY tips for addressing the P0051 error code in a 2014 Chevrolet Silverado?

- DIY enthusiasts can attempt to inspect the oxygen sensor and wiring for visible damage, check and replace any blown fuses, and clear the code with an OBDII scanner to see if it returns.

9. What happens if the P0051 code is ignored in a 2014 Chevrolet Silverado?

- Ignoring the P0051 code can lead to reduced fuel efficiency, potential engine performance issues, and long-term damage to the vehicle's emissions system.

10. How often does the HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 1 error occur in a 2014 Chevrolet Silverado?

- The occurrence of the P0051 code can vary, but it is not an uncommon issue in vehicles with heated oxygen sensors like the 2014 Chevrolet Silverado.