AutoCodes – Chevrolet – P116A 2017 Chevrolet Silverado

P116A 2017 Chevrolet Silverado Code - O2 Signal Circuit (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: P116A 2017 Chevrolet Silverado indicates O2 Signal Circuit (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 250

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 P116A 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 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 P116A 2017 Chevrolet Silverado - O2 Signal Circuit (NOx Sensor 1) - AutoCodes.com — P116A 2017 Chevrolet Silverado Code - O2 Signal Circuit (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116A 2017 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 P116A 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 P116A 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 P116A 2017 Chevrolet Silverado code?

Need more information on how to fix the P116A 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P116A 2017 Chevrolet Silverado Code

1. What does OBDII code P116A mean on a 2017 Chevrolet Silverado?

P116A indicates an issue with the O2 signal circuit for NOx Sensor 1, which monitors nitrogen oxide levels in the vehicle's exhaust system.

2. What are the common symptoms of code P116A in a 2017 Chevy Silverado?

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, and possible limp mode activation.

3. What causes the P116A code to appear on a 2017 Chevrolet Silverado?

Common causes include a faulty NOx Sensor 1, wiring or connector issues, exhaust leaks, or a malfunctioning engine control module (ECM).

4. Can I drive my 2017 Chevrolet Silverado with a P116A code?

Driving with this code is possible but not recommended, as it may lead to increased emissions, reduced performance, and potential damage to the catalytic converter.

5. How do I diagnose a P116A code on a 2017 Chevy Silverado?

Diagnose by using an OBDII scanner to confirm the code, inspecting the NOx sensor and its wiring for damage, and checking for exhaust leaks near the sensor.

6. How do I fix the P116A code on my 2017 Chevrolet Silverado?

Repairs may involve replacing the NOx Sensor 1, repairing or replacing damaged wiring or connectors, or addressing any exhaust leaks.

7. How much does it cost to fix a P116A code on a 2017 Chevrolet Silverado?

The cost varies but typically ranges from $300 to $800, depending on whether the NOx sensor or wiring needs replacement.

8. Can a bad NOx sensor cause engine damage in a 2017 Chevrolet Silverado?

A bad NOx sensor itself won't directly cause engine damage but can lead to poor engine performance and increased emissions if left unaddressed.

9. Is the P116A code covered under warranty for a 2017 Chevrolet Silverado?

It depends on your warranty coverage, but emissions-related components like the NOx sensor may be covered under the vehicle's emissions warranty.

10. Do I need to reprogram the ECM after replacing the NOx sensor for code P116A?

In some cases, the ECM may need to be reset or updated to ensure proper communication with the new NOx sensor. Consult your vehicle's repair manual or a professional technician.