AutoCodes – GMC – P116D 2015 GMC Sierra

P116D 2015 GMC Sierra 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 GMC Sierra 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 176

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 P116D 2015 GMC Sierra 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 GMC Sierra - O2 Pump Current Control Circuit (NOx Sensor 1) - AutoCodes.com — P116D 2015 GMC Sierra Code - O2 Pump Current Control Circuit (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116D 2015 GMC Sierra?

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 GMC Sierra?

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 GMC Sierra 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 GMC Sierra 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 GMC Sierra Code

1. What are common symptoms of OBDII code P116D in a 2015 GMC Sierra?

- Common symptoms include reduced engine performance, decreased fuel efficiency, rough idling, and the illumination of the check engine light.

2. What does the O2 Pump Current Control Circuit (NOx Sensor 1) error code P116D indicate in a 2015 GMC Sierra?

- This code indicates a malfunction in the oxygen pump current control circuit related to the NOx (nitrogen oxide) sensor 1 in the vehicle's emissions system.

3. What are possible causes of the P116D error code in a 2015 GMC Sierra?

- Potential causes include a faulty NOx sensor, damaged wiring or connectors in the O2 pump current control circuit, a malfunctioning PCM (powertrain control module), or issues with the sensor's heater circuit.

4. How serious is the O2 Pump Current Control Circuit (NOx Sensor 1) error code P116D in a 2015 GMC Sierra?

- While the vehicle may still be operable with this code present, it is important to address it promptly to prevent potential damage to the emissions system and ensure optimal engine performance.

5. Can I continue driving my 2015 GMC Sierra with the P116D OBDII code?

- It is generally not recommended to continue driving the vehicle with this code as it can lead to decreased fuel efficiency, poor engine performance, and potential emissions issues.

6. How can I diagnose and repair the P116D code in my 2015 GMC Sierra?

- Diagnosing and repairing this code typically involves using a diagnostic scanner to pinpoint the exact cause, inspecting the NOx sensor and related components, checking wiring and connectors for damage, and potentially replacing the faulty parts.

7. Are there any DIY tips for resolving the P116D error code in a 2015 GMC Sierra?

- DIY tips include checking for loose or damaged wiring, ensuring proper connections, and inspecting the NOx sensor for signs of damage. However, complex repairs may require professional assistance.

8. Will resetting the check engine light clear the P116D code in my 2015 GMC Sierra?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the P116D code is not addressed, the light is likely to come back on.

9. How much does it cost to fix the O2 Pump Current Control Circuit (NOx Sensor 1) error code P116D in a 2015 GMC Sierra?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a mechanic easily fix the P116D error code in a 2015 GMC Sierra?

- A qualified mechanic with experience in diagnosing and repairing emission system issues should be able to efficiently address the P116D code in a 2015 GMC Sierra.