AutoCodes – Chevrolet – P11B3 2016 Chevrolet Silverado

P11B3 2016 Chevrolet Silverado Code - HO2S Performance During Deceleration Fuel Cut-Off Bank 1 Sensor 2

Quick Answer

The oxygen content of the exhaust is measured via the nitrogen oxide (NOx) sensors. Common causes include Faulty Nitrogen Oxide (NOx) Sensor 2, Nitrogen Oxide Sensor 2 harness is open or shorted, Nitrogen Oxide 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: P11B3 2016 Chevrolet Silverado indicates HO2S Performance During Deceleration Fuel Cut-Off Bank 1 Sensor 2.
Common causes: Common causes include Faulty Nitrogen Oxide (NOx) Sensor 2, Nitrogen Oxide Sensor 2 harness is open or shorted, Nitrogen Oxide 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 278

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P11B3 2016 Chevrolet Silverado Description

The oxygen content of the exhaust is measured via the nitrogen oxide (NOx) sensors. The nitrogen oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. There are two NOx sensors, one placed upstream of selective catalytic reduction, to measure inlet NOx concentration, and one placed downstream. They are connected with the control module via CAN and all the information is exchanged through it. Since it is a smart sensor, all the electrical monitoring is performed inside the sensor and only the results are sent to the ECM. Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within the sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust. The ECM varies the amount of diesel exhaust fluid (reductant) added by varying the reductant injector duty cycle in response to changes in engine exhaust NOx levels. The smart NOx sensors consist of two components, the NOx module, and the NOx sensor element, that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module. The Diagnostic Trouble Code (DTC) will be set when the NOx sensor module detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor.

OBDII Code P11B3 2016 Chevrolet Silverado - HO2S Performance During Deceleration Fuel Cut-Off Bank 1 Sensor 2 - AutoCodes.com — P11B3 2016 Chevrolet Silverado Code - HO2S Performance During Deceleration Fuel Cut-Off Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P11B3 2016 Chevrolet Silverado?

Faulty Nitrogen Oxide (NOx) Sensor 2
Nitrogen Oxide Sensor 2 harness is open or shorted
Nitrogen Oxide Sensor 2 circuit poor electrical connection

How to Fix the DTC P11B3 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P11B3 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.

Need more information about the P11B3 2016 Chevrolet Silverado code?

Need more information on how to fix the P11B3 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11B3 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P11B3 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P11B3 on a 2016 Chevrolet Silverado?

- Common symptoms include poor fuel economy, rough idle, engine hesitation, and illuminated Check Engine Light.

2. What does the OBDII code P11B3 indicate on a 2016 Chevrolet Silverado?

- The code P11B3 specifically relates to the HO2S (Heated Oxygen Sensor) performance during deceleration fuel cut-off for Bank 1 Sensor 2.

3. What are the possible causes of OBDII code P11B3 on a 2016 Chevrolet Silverado?

- Potential causes may include a faulty oxygen sensor, wiring issues, exhaust leaks, fuel system problems, or an engine performance issue.

4. How can I diagnose the OBDII code P11B3 on my 2016 Chevrolet Silverado?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and related wiring, and testing the sensor's performance.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P11B3?

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

6. How can I repair OBDII code P11B3 on my 2016 Chevrolet Silverado?

- Repairing this code may involve replacing the Bank 1 Sensor 2 oxygen sensor, repairing any wiring issues, fixing exhaust leaks, or addressing underlying fuel system problems.

7. Is it possible to clear OBDII code P11B3 on a 2016 Chevrolet Silverado without fixing the issue?

- Clearing the code without addressing the underlying problem may temporarily turn off the Check Engine Light, but the issue will likely reoccur.

8. Are there any maintenance tips to prevent OBDII code P11B3 on a 2016 Chevrolet Silverado?

- Regularly inspecting and maintaining the oxygen sensors, fuel system components, and exhaust system can help prevent issues leading to this code.

9. How long does it typically take to repair OBDII code P11B3 on a 2016 Chevrolet Silverado?

- The repair time can vary depending on the exact cause of the code, but it may take anywhere from a few hours to a full day to diagnose and fix the issue.

10. Can I reset the Check Engine Light after repairing OBDII code P11B3 on my 2016 Chevrolet Silverado?

- Yes, after successfully repairing the issue causing the code, you can reset the Check Engine Light using an OBDII scanner to clear the code from the system.