AutoCodes – Chevrolet – P116B 2016 Chevrolet Silverado

P116B 2016 Chevrolet Silverado Code - O2 Signal Circuit Low Voltage (NOx Sensor 1)

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, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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: P116B 2016 Chevrolet Silverado indicates O2 Signal Circuit Low Voltage (NOx Sensor 1).
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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 254

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 P116B 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 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 P116B 2016 Chevrolet Silverado - O2 Signal Circuit Low Voltage (NOx Sensor 1) - AutoCodes.com — P116B 2016 Chevrolet Silverado Code - O2 Signal Circuit Low Voltage (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116B 2016 Chevrolet Silverado?

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

How to Fix the DTC P116B 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 P116B 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 P116B 2016 Chevrolet Silverado code?

Need more information on how to fix the P116B 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 P116B 2016 Chevrolet Silverado Code

1. What does the OBDII code P116B mean on a 2016 Chevrolet Silverado?

P116B indicates that the O2 signal circuit for NOx Sensor 1 is detecting low voltage, which means the sensor is not operating within its expected range.

2. What are the common symptoms of the P116B code in a 2016 Chevy Silverado?

Symptoms may include a check engine light, reduced fuel efficiency, poor engine performance, and possibly increased emissions.

3. What causes the P116B code to appear?

Common causes include a faulty NOx sensor 1, damaged wiring or connectors in the sensor circuit, or a malfunctioning engine control module (ECM).

4. Can a dirty or clogged NOx sensor cause the P116B code?

Yes, a dirty, clogged, or contaminated NOx sensor can cause signal issues, leading to the P116B code.

5. How can I diagnose the P116B code on my Silverado?

Start by inspecting the wiring and connectors for damage or corrosion, test the NOx sensor with a multimeter, and verify its function using an advanced scan tool.

6. Is it safe to drive with the P116B code on a 2016 Chevy Silverado?

While it may be safe to drive temporarily, ignoring the issue can lead to reduced engine performance and potential damage to the catalytic converter over time.

7. How is the P116B code fixed?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ECM if necessary.

8. How much does it cost to fix the P116B code on a Silverado?

The cost varies but typically ranges from $300 to $700, depending on whether the NOx sensor needs replacing and labor rates in your area.

9. Can I clear the P116B code without fixing it?

Clearing the code without addressing the root cause will only temporarily remove the check engine light, as the issue will likely trigger the code again.

10. How can I prevent the P116B code from recurring?

Regular maintenance, using high-quality fuel, and addressing any wiring or sensor issues promptly can help prevent this code from returning.