AutoCodes – Chevrolet – P0056 2016 Chevrolet Silverado

P0056 2016 Chevrolet Silverado Code - HO2S Heater Control Circuit Bank 2 Sensor 2

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 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0056 2016 Chevrolet Silverado indicates HO2S Heater Control Circuit Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 511

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0056 2016 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 an open circuit 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 P0056 2016 Chevrolet Silverado - HO2S Heater Control Circuit Bank 2 Sensor 2 - AutoCodes.com — P0056 2016 Chevrolet Silverado Code - HO2S Heater Control Circuit Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0056 2016 Chevrolet Silverado?

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

How to Fix the DTC P0056 2016 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 P0056 2016 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 P0056 2016 Chevrolet Silverado Code

1. What does OBDII code P0056 on a 2016 Chevrolet Silverado mean?

Code P0056 refers to a malfunction in the HO2S (Heated Oxygen Sensor) Heater Control Circuit for Bank 2 Sensor 2.

2. What are the common symptoms of OBDII code P0056 in a 2016 Chevrolet Silverado?

Common symptoms of P0056 may include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.

3. What are the possible causes of OBDII code P0056 in a 2016 Chevrolet Silverado?

Possible causes of P0056 include a faulty HO2S sensor, damaged wiring or connectors, a blown fuse, or issues with the ECM (Engine Control Module).

4. How can I diagnose OBDII code P0056 in my 2016 Chevrolet Silverado?

Diagnosing P0056 involves using an OBDII scanner to retrieve the code, inspecting the wiring and connectors related to Bank 2 Sensor 2, and testing the sensor's heater circuit for proper function.

5. Can I drive my 2016 Chevrolet Silverado with OBDII code P0056?

It is not recommended to drive your Silverado with code P0056 as it can lead to decreased fuel efficiency and potential engine damage. It's best to address the issue promptly.

6. How can I repair OBDII code P0056 on my 2016 Chevrolet Silverado?

Repairing P0056 may involve replacing the HO2S sensor for Bank 2 Sensor 2, repairing or replacing damaged wiring or connectors, checking and replacing fuses if necessary, and clearing the trouble code.

7. Is it possible to prevent OBDII code P0056 from occurring in my 2016 Chevrolet Silverado?

Regular maintenance, such as ensuring proper engine performance and timely sensor replacements, can help prevent issues like P0056 from occurring in your Silverado.

8. How much does it typically cost to repair OBDII code P0056 on a 2016 Chevrolet Silverado?

The cost of repairing P0056 can vary depending on the extent of the issue and the parts needed, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast fix OBDII code P0056 on a 2016 Chevrolet Silverado?

If you have the necessary tools, knowledge, and experience, it is possible to address P0056 as a DIY project. However, if you're unsure, it's best to consult a professional mechanic.

10. How urgent is it to address OBDII code P0056 on a 2016 Chevrolet Silverado?

While your vehicle may still be operable with P0056, it's important to address the issue promptly to prevent further damage and maintain optimal engine performance.