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P11BE 2016 Chevrolet Silverado Code - O2 Reference Voltage Circuit (NOx Sensor 2)

Quick Answer

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides 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: P11BE 2016 Chevrolet Silverado indicates O2 Reference Voltage Circuit (NOx Sensor 2).
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides 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 246

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 Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P11BE 2016 Chevrolet Silverado Description

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 Engine Control Module (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 if the ECM software detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor for greater than 2 s.

OBDII Code P11BE 2016 Chevrolet Silverado - O2 Reference Voltage Circuit (NOx Sensor 2) - AutoCodes.com — P11BE 2016 Chevrolet Silverado Code - O2 Reference Voltage Circuit (NOx Sensor 2)

What does this mean?

What are the Possible Causes of the DTC P11BE 2016 Chevrolet Silverado?

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

How to Fix the DTC P11BE 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 P11BE 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 P11BE 2016 Chevrolet Silverado code?

Need more information on how to fix the P11BE 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the 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 P11BE 2016 Chevrolet Silverado Code

1. What does OBDII code P11BE mean on a 2016 Chevrolet Silverado?

P11BE indicates an issue with the O2 reference voltage circuit for NOx Sensor 2, typically related to a fault in the sensor or its wiring.

2. What are common symptoms of code P11BE in a 2016 Silverado?

Symptoms include the check engine light turning on, reduced fuel efficiency, poor engine performance, and possible emissions test failure.

3. What causes the P11BE code to appear?

Common causes include a faulty NOx Sensor 2, damaged wiring or connectors in the sensor circuit, or a malfunctioning engine control module (ECM).

4. How do I troubleshoot the P11BE code on my Silverado?

Start by inspecting the wiring and connectors for NOx Sensor 2 for damage or corrosion, then test the sensor's functionality and ensure the reference voltage is within specifications.

5. Can I drive with the P11BE code active?

Driving with the P11BE code is not recommended, as it can lead to increased emissions, reduced engine performance, and potential damage to other components.

6. How much does it cost to fix the P11BE code?

Repair costs can vary, but replacing a NOx sensor typically costs $300-$700, including parts and labor. Wiring or connector repairs may be less expensive.

7. How do I reset the P11BE code after repairs?

Use an OBDII scanner to clear the code after completing repairs. If the issue is resolved, the code should not return.

8. Can a dirty or clogged NOx sensor cause the P11BE code?

Yes, a dirty or clogged NOx sensor can cause inaccurate readings, leading to the P11BE code. Cleaning or replacing the sensor may resolve the issue.

9. What is the role of NOx Sensor 2 in the 2016 Silverado?

NOx Sensor 2 monitors nitrogen oxide levels in the exhaust to ensure proper emissions control and efficient operation of the selective catalytic reduction (SCR) system.

10. Will fixing the P11BE code improve fuel efficiency?

Yes, addressing the P11BE code can improve fuel efficiency by restoring proper engine and emissions system performance.