AutoCodes – Chevrolet – P116D Chevrolet

P116D Chevrolet 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 Chevrolet 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 1,004

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 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P116D Chevrolet 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 Chevrolet - O2 Pump Current Control Circuit (NOx Sensor 1) - AutoCodes.com — P116D Chevrolet Code - O2 Pump Current Control Circuit (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116D Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the P116D Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P116D Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P116D 2014 Chevrolet Silverado — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D 2015 Chevrolet Silverado — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D 2016 Chevrolet Silverado — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D 2017 Chevrolet Silverado — O2 Pump Current Control Circuit (NOx Sensor 1)
P116D 2018 Chevrolet Silverado — O2 Pump Current Control Circuit (NOx Sensor 1)

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 Chevrolet Code

1. What are the common symptoms of OBDII code P116D in a Chevrolet related to the O2 Pump Current Control Circuit (NOx Sensor 1)?

Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, and the illumination of the check engine light.

2. What are the potential causes of OBDII code P116D in a Chevrolet indicating an issue with the O2 Pump Current Control Circuit (NOx Sensor 1)?

Possible causes include a faulty NOx sensor, damaged wiring or connectors in the circuit, a malfunctioning O2 pump, or issues with the engine control module.

3. How can I diagnose OBDII code P116D in my Chevrolet to pinpoint the exact cause related to the O2 Pump Current Control Circuit (NOx Sensor 1)?

Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, conducting a visual inspection of the sensor and its wiring, testing the O2 pump, and checking for any related technical service bulletins.

4. Can I continue driving my Chevrolet with OBDII code P116D related to the O2 Pump Current Control Circuit (NOx Sensor 1) illuminated?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the emission control system and potentially affect the overall performance of the vehicle.

5. What are some repair tips for addressing OBDII code P116D in a Chevrolet due to issues with the O2 Pump Current Control Circuit (NOx Sensor 1)?

Repair options may include replacing the NOx sensor, repairing or replacing damaged wiring or connectors, testing and replacing the O2 pump if necessary, and resetting the engine control module after completing the repairs.

6. How critical is it to address OBDII code P116D in a Chevrolet associated with the O2 Pump Current Control Circuit (NOx Sensor 1)?

It is important to address this code promptly to ensure proper vehicle performance, maintain emissions compliance, and prevent potential damage to other components of the vehicle's emission control system.

7. Can a DIY enthusiast repair OBDII code P116D in a Chevrolet related to the O2 Pump Current Control Circuit (NOx Sensor 1)?

Depending on their skill level and access to tools, a DIY enthusiast may be able to address this code by following repair guides, but it is recommended to consult a professional mechanic for accurate diagnosis and proper repairs.

8. How much does it typically cost to repair OBDII code P116D in a Chevrolet caused by issues with the O2 Pump Current Control Circuit (NOx Sensor 1)?

The cost of repairs can vary depending on the specific cause of the issue, the necessary parts and labor involved, and the service provider. It is advisable to obtain multiple quotes from different repair shops.

9. Are there any recalls or technical service bulletins related to OBDII code P116D in Chevrolet vehicles concerning the O2 Pump Current Control Circuit (NOx Sensor 1)?

It is recommended to check with Chevrolet dealerships or online databases for any relevant recalls or technical service bulletins related to this specific OBDII code to see if there are any known issues or remedies provided by the manufacturer.

10. Is it possible for a faulty O2 Pump Current Control Circuit (NOx Sensor 1) to cause other OBDII codes to appear in a Chevrolet?

Yes, a malfunctioning O2 Pump Current Control Circuit (NOx Sensor 1) can cause issues that trigger other related codes, so it is essential to address and resolve this code promptly to prevent further complications.