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AutoCodes – Chevrolet – P116D 2015 Chevrolet Silverado

P116D 2015 Chevrolet Silverado Code - O2 Pump Current Control 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
P116D 2015 Chevrolet Silverado indicates O2 Pump Current Control 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 195
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Mar 24, 2024
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Code P116D 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 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 P116D 2015 Chevrolet Silverado - O2 Pump Current Control Circuit (NOx Sensor 1) - AutoCodes.com
P116D 2015 Chevrolet Silverado Code - O2 Pump Current Control Circuit (NOx Sensor 1)
What does this mean?

What are the Possible Causes of the DTC P116D 2015 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 P116D 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 P116D 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 P116D 2015 Chevrolet Silverado code?

Need more information on how to fix the P116D 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 P116D 2015 Chevrolet Silverado Code

1. What does the OBDII code P116D mean on a 2015 Chevrolet Silverado?

P116D indicates an issue with the O2 Pump Current Control Circuit in NOx Sensor 1, which monitors and regulates the nitrogen oxide levels emitted by the engine.

2. What are the symptoms of a P116D code in a 2015 Chevrolet Silverado?

Symptoms may include reduced fuel efficiency, illuminated check engine light, rough idling, poor engine performance, or increased emissions.

3. What causes the P116D code in a 2015 Chevrolet Silverado?

Common causes include a faulty NOx sensor, damaged wiring or connectors in the O2 pump circuit, or issues with the engine control module (ECM).

4. How do you diagnose a P116D code on a 2015 Chevrolet Silverado?

Diagnosing involves scanning with an OBDII tool, checking the NOx sensor and wiring for damage, and testing the O2 pump circuit for proper voltage and resistance.

5. Can a bad NOx sensor trigger the P116D code?

Yes, a faulty NOx sensor is one of the most common reasons for this code.

6. Can you drive with a P116D code on a 2015 Chevrolet Silverado?

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

7. How is a P116D code typically fixed on a 2015 Chevrolet Silverado?

Repairs typically involve replacing the NOx sensor, repairing damaged wiring or connectors, or reprogramming/updating the ECM.

8. How much does it cost to fix a P116D code on a 2015 Chevrolet Silverado?

The cost can vary, but replacing a NOx sensor typically ranges from $300 to $700, including parts and labor.

9. Is a software update required to fix the P116D code?

In some cases, an ECM software update may be needed to resolve the issue, especially if the problem persists after sensor replacement.

10. What tools are needed to troubleshoot the P116D code?

You’ll need an OBDII scanner, a multimeter for circuit testing, and possibly a diagnostic flowchart specific to the 2015 Chevrolet Silverado.

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