AutoCodes – Chevrolet – P11BE 2015 Chevrolet Silverado

P11BE 2015 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 2015 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 274

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 2015 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 2015 Chevrolet Silverado - O2 Reference Voltage Circuit (NOx Sensor 2) - AutoCodes.com — P11BE 2015 Chevrolet Silverado Code - O2 Reference Voltage Circuit (NOx Sensor 2)

What does this mean?

What are the Possible Causes of the DTC P11BE 2015 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 2015 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 2015 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 2015 Chevrolet Silverado code?

Need more information on how to fix the P11BE 2015 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 2015 Chevrolet Silverado Code

1. What does OBDII code P11BE for a 2015 Chevrolet Silverado indicate?

- OBDII code P11BE refers to a problem with the O2 reference voltage circuit for NOx Sensor 2 in the vehicle's emissions system.

2. What are common symptoms of OBDII code P11BE in a 2015 Chevrolet Silverado?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

3. What are possible causes of OBDII code P11BE in a 2015 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, damaged wiring or connectors in the O2 reference voltage circuit, or issues with the vehicle's powertrain control module (PCM).

4. How can I diagnose the O2 reference voltage circuit issue related to OBDII code P11BE in my 2015 Chevrolet Silverado?

- Diagnosing the problem may involve using a scan tool to check for related trouble codes, inspecting the wiring and connectors for damage, and testing the NOx sensor and its connections.

5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P11BE present?

- It is not recommended to continue driving the vehicle with this code present as it can lead to further damage and potential emissions issues.

6. How can I repair OBDII code P11BE in my 2015 Chevrolet Silverado?

- Repair may involve replacing the faulty NOx sensor, repairing or replacing damaged wiring or connectors, or reprogramming the PCM to address the issue.

7. Are there any tips for preventing O2 reference voltage circuit problems in a 2015 Chevrolet Silverado?

- Regular maintenance, such as checking and replacing sensors as needed, can help prevent issues with the O2 reference voltage circuit and related components.

8. Can a DIY enthusiast fix OBDII code P11BE in a 2015 Chevrolet Silverado?

- While some may be able to diagnose and repair simple issues related to this code, complex electrical or sensor problems may require professional diagnosis and repair.

9. How long does it typically take to repair OBDII code P11BE in a 2015 Chevrolet Silverado?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from a few hours to a day to complete the necessary repairs.

10. Is it necessary to reset the check engine light after repairing OBDII code P11BE in a 2015 Chevrolet Silverado?

- Yes, it is recommended to clear the trouble codes and reset the check engine light using a scan tool after resolving the issue to ensure proper functioning and monitoring of the vehicle's systems.