AutoCodes – GMC – P116F 2014 GMC Sierra

P116F 2014 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 2014 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 150

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 2014 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 2014 GMC Sierra - O2 Pump Current Control Circuit High Voltage (NOx Sensor 1) - AutoCodes.com — P116F 2014 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 2014 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 2014 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 2014 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 2014 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 P116F 2014 GMC Sierra Code

What does OBDII code P116F mean for a 2014 GMC Sierra?

Code P116F indicates an issue with the O2 Pump Current Control Circuit High Voltage for NOx Sensor 1, which monitors nitrogen oxide levels in the exhaust.

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

Symptoms can include a check engine light, reduced fuel efficiency, poor engine performance, and possible limp mode activation.

What causes the P116F code in a 2014 GMC Sierra?

Common causes include a faulty NOx sensor, wiring issues such as damaged or corroded connectors, or problems with the vehicleâ€™s PCM (Powertrain Control Module).

How do I diagnose the P116F code on my GMC Sierra?

Start by inspecting the NOx sensor wiring and connectors for damage or corrosion, then test the sensor itself and check for proper voltage readings using a scan tool.

Can I drive my 2014 GMC Sierra with code P116F?

Driving is possible but not recommended, as this code can lead to decreased engine performance and increased emissions. Prompt repairs are advised.

How do I fix code P116F on a GMC Sierra?

Repairs may involve replacing the NOx sensor, repairing or replacing damaged wiring, or reprogramming or replacing the PCM if necessary.

What is the cost of repairing code P116F on a 2014 GMC Sierra?

Repair costs vary but typically range from $200 to $600, depending on whether the NOx sensor or other components need replacement.

Can I clear code P116F without fixing the issue?

Clearing the code without addressing the underlying issue may temporarily turn off the check engine light, but the code will likely return, and performance issues may persist.

How can I prevent code P116F from occurring again?

Regular maintenance, including checking wiring and connectors for corrosion or damage, can help prevent recurrence. Using high-quality fuel may also reduce NOx sensor wear.

Does code P116F affect emissions testing?

Yes, code P116F can cause your vehicle to fail emissions testing due to increased nitrogen oxide levels in the exhaust.