AutoCodes – GMC – P116F GMC

P116F GMC 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 GMC 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 343

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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

What does this mean?

What are the Possible Causes of the DTC P116F GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P116F GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P116F 2014 GMC Sierra — O2 Pump Current Control Circuit High Voltage (NOx Sensor 1)
P116F 2015 GMC Sierra — O2 Pump Current Control Circuit High Voltage (NOx Sensor 1)
P116F 2016 GMC Sierra — O2 Pump Current Control Circuit High Voltage (NOx Sensor 1)
P116F 2017 GMC Sierra — O2 Pump Current Control Circuit High Voltage (NOx Sensor 1)
P116F 2018 GMC Sierra — O2 Pump Current Control Circuit High Voltage (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 P116F GMC Code

1. What are the common symptoms of OBDII code P116F in a GMC vehicle?

- Common symptoms of OBDII code P116F include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What can cause the O2 Pump Current Control Circuit High Voltage (NOx Sensor 1) error code in a GMC vehicle?

- The P116F code in a GMC vehicle can be caused by issues such as a faulty NOx sensor, wiring problems, or a malfunctioning O2 pump current control circuit.

3. How serious is the O2 Pump Current Control Circuit High Voltage fault code in a GMC vehicle?

- The P116F fault code should be addressed promptly to prevent potential damage to the vehicle's emissions system and to ensure optimal engine performance.

4. Can I drive my GMC vehicle with the OBDII code P116F present?

- It is not recommended to drive your GMC vehicle with the P116F code present, as it can lead to poor engine performance and potential damage to the emissions system.

5. How can I diagnose the O2 Pump Current Control Circuit High Voltage error code in my GMC vehicle?

- Diagnosis of the P116F code typically involves using an OBDII scanner to retrieve the specific fault code and then conducting further testing to pinpoint the root cause.

6. What are some repair tips for fixing the O2 Pump Current Control Circuit High Voltage fault in a GMC vehicle?

- Repair tips for addressing the P116F code may include checking and replacing the NOx sensor, inspecting the wiring for any damage, and testing the O2 pump current control circuit for proper functionality.

7. Is it possible to reset the Check Engine Light after addressing the OBDII code P116F in a GMC vehicle?

- Yes, once the underlying issue causing the P116F code has been fixed, the Check Engine Light can be reset using an OBDII scanner to clear the error code.

8. Can a DIY enthusiast fix the O2 Pump Current Control Circuit High Voltage fault in a GMC vehicle?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing the P116F code may require specialized tools and expertise, so professional assistance is recommended.

9. How much does it cost to repair the O2 Pump Current Control Circuit High Voltage error code in a GMC vehicle?

- The cost of repairing the P116F code can vary depending on the specific cause of the issue, but it may involve expenses such as parts replacement, labor costs, and diagnostic fees.

10. Are there any preventive maintenance measures to avoid the OBDII code P116F in a GMC vehicle?

- To help prevent the occurrence of the P116F code, it is important to follow the manufacturer's recommended maintenance schedule, regularly inspect the emissions system, and address any issues promptly.