AutoCodes – GMC – P116F 2015 GMC Sierra

P116F 2015 GMC Sierra Code - O2 Pump Current Control Circuit High 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: P116F 2015 GMC Sierra indicates O2 Pump Current Control Circuit High 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 160

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 P116F 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 P116F 2015 GMC Sierra - O2 Pump Current Control Circuit High Voltage (NOx Sensor 1) - AutoCodes.com — P116F 2015 GMC Sierra Code - O2 Pump Current Control Circuit High Voltage (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116F 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 P116F 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 P116F 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 P116F 2015 GMC Sierra code?

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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 P116F 2015 GMC Sierra Code

What does the OBDII code P116F mean for a 2015 GMC Sierra?

P116F indicates an issue with the O2 Pump Current Control Circuit High Voltage in NOx Sensor 1, meaning the sensor is detecting higher-than-expected voltage in the circuit.

What are the common symptoms of code P116F in a 2015 GMC Sierra?

Common symptoms include the Check Engine Light being illuminated, reduced engine performance, increased fuel consumption, and potential difficulty passing emissions tests.

What causes the P116F code to appear on a 2015 GMC Sierra?

The code can be triggered by a faulty NOx sensor, damaged wiring or connectors, a malfunctioning ECM (Engine Control Module), or a buildup of carbon or contaminants in the exhaust system.

Can I drive my 2015 GMC Sierra with the P116F code active?

While the vehicle may still be drivable, it is not recommended to ignore the issue as it can lead to reduced performance, higher emissions, and potential damage to other components.

How do I diagnose the P116F code on a 2015 GMC Sierra?

Start by using an OBDII scanner to confirm the code, inspect the NOx sensor and its wiring for damage, and check for loose or corroded connectors. Advanced diagnostics may require testing the sensor's voltage and current readings.

What tools are needed to fix the P116F code on a 2015 GMC Sierra?

You may need an OBDII scanner, a multimeter for electrical testing, and basic hand tools for removing and replacing the NOx sensor or repairing wiring.

How much does it cost to fix a P116F code on a 2015 GMC Sierra?

The cost varies depending on the issue. Replacing the NOx sensor can cost $300â€“$700, while repairing wiring or connectors is typically less expensive.

Can a P116F code be caused by a software issue in the 2015 GMC Sierra?

Yes, in some cases, a software update for the ECM may be required to resolve the issue, especially if the code persists after replacing the NOx sensor.

How do I prevent the P116F code from returning on my 2015 GMC Sierra?

Regular maintenance, using high-quality fuel, and ensuring the exhaust system is clean can help prevent this issue. Additionally, promptly addressing any wiring or sensor problems can reduce the risk of recurrence.

Is it necessary to replace the NOx sensor to fix the P116F code?

Not always. While a faulty NOx sensor is a common cause, the issue could also stem from damaged wiring, connectors, or ECM problems, so a proper diagnosis is essential before replacing the sensor.