AutoCodes – Chevrolet – P11BE 2017 Chevrolet Silverado

P11BE 2017 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 2017 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 427

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 2017 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 2017 Chevrolet Silverado - O2 Reference Voltage Circuit (NOx Sensor 2) - AutoCodes.com — P11BE 2017 Chevrolet Silverado Code - O2 Reference Voltage Circuit (NOx Sensor 2)

What does this mean?

What are the Possible Causes of the DTC P11BE 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P11BE 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11BE 2017 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 P11BE 2017 Chevrolet Silverado Code

1. What is OBDII code P11BE on a 2017 Chevrolet Silverado related to?

The OBDII code P11BE on a 2017 Chevrolet Silverado is related to the O2 reference voltage circuit for NOx Sensor 2.

2. What are common symptoms of OBDII code P11BE on a 2017 Chevrolet Silverado?

Common symptoms of OBDII code P11BE may include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

3. What can cause the OBDII code P11BE to trigger on a 2017 Chevrolet Silverado?

The OBDII code P11BE can be triggered on a 2017 Chevrolet Silverado due to issues such as a faulty NOx sensor, damaged wiring, or a malfunctioning engine control module.

4. How serious is OBDII code P11BE on a 2017 Chevrolet Silverado?

OBDII code P11BE should be addressed promptly to prevent potential damage to the emissions control system and ensure optimal engine performance.

5. How can I diagnose OBDII code P11BE on my 2017 Chevrolet Silverado?

Diagnosing OBDII code P11BE typically involves using an OBDII scanner to retrieve the specific fault code and then performing further testing on the NOx sensor, wiring, and related components.

6. Can I repair OBDII code P11BE on my 2017 Chevrolet Silverado myself?

While it's possible to address some causes of OBDII code P11BE, such as checking and repairing wiring connections, more complex issues may require professional diagnosis and repair.

7. What are some tips for fixing OBDII code P11BE on a 2017 Chevrolet Silverado?

Tips for fixing OBDII code P11BE include checking for damaged wiring, ensuring proper sensor connections, and following the manufacturer's diagnostic procedures.

8. Is it safe to continue driving with OBDII code P11BE illuminated on a 2017 Chevrolet Silverado?

It is not recommended to continue driving with the OBDII code P11BE illuminated, as it can lead to increased emissions, reduced fuel efficiency, and potential engine damage if left unresolved.

9. How much does it cost to repair OBDII code P11BE on a 2017 Chevrolet Silverado?

The cost to repair OBDII code P11BE on a 2017 Chevrolet Silverado can vary depending on the underlying cause of the issue, with expenses ranging from a simple sensor replacement to more extensive repairs.

10. Can resetting the check engine light resolve OBDII code P11BE on a 2017 Chevrolet Silverado?

Resetting the check engine light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing OBDII code P11BE on a 2017 Chevrolet Silverado.