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P116D 2016 GMC Sierra Code - O2 Pump Current Control Circuit (NOx Sensor 1)

Quick Answer

The P116D diagnostic trouble code (DTC) specifically relates to the O2 pump current control circuit for NOx Sensor 1 in a 2016 GMC Sierra. Common causes include Faulty NOx Sensor: The NOx sensor itself may be malfunctioning, causing issues with the O2 pump current control circuit, Wiring or Connector Issues: Damaged wiring or connectors in the circuit can disrupt the flow of current to the sensor, ECM Malfunction: A malfunctioning engine control module (ECM) can also trigger the P116D code. 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 2016 GMC Sierra indicates O2 Pump Current Control Circuit (NOx Sensor 1).
Common causes
Common causes include Faulty NOx Sensor: The NOx sensor itself may be malfunctioning, causing issues with the O2 pump current control circuit, Wiring or Connector Issues: Damaged wiring or connectors in the circuit can disrupt the flow of current to the sensor, ECM Malfunction: A malfunctioning engine control module (ECM) can also trigger the P116D code.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P116D 2016 GMC Sierra Description

The P116D diagnostic trouble code (DTC) specifically relates to the O2 pump current control circuit for NOx Sensor 1 in a 2016 GMC Sierra. This code indicates that there is an issue with the oxygen sensor pump current control circuit, which is responsible for regulating the flow of current to the NOx sensor. The NOx sensor plays a crucial role in monitoring the levels of nitrogen oxides in the exhaust gases and helps the engine control module (ECM) adjust the air-fuel mixture for optimal performance and emissions control.

OBDII Code P116D 2016 GMC Sierra - O2 Pump Current Control Circuit (NOx Sensor 1)
P116D 2016 GMC Sierra Code - O2 Pump Current Control Circuit (NOx Sensor 1)

Common Causes of P116D 2016 GMC Sierra

  1. Faulty NOx Sensor: The NOx sensor itself may be malfunctioning, causing issues with the O2 pump current control circuit.
  2. Wiring or Connector Issues: Damaged wiring or connectors in the circuit can disrupt the flow of current to the sensor.
  3. ECM Malfunction: A malfunctioning engine control module (ECM) can also trigger the P116D code.
  4. Power Supply Problems: Issues with the power supply to the sensor can prevent it from functioning properly.

Symptoms of P116D 2016 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P116D code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A faulty NOx sensor can lead to poor fuel efficiency as the ECM struggles to adjust the air-fuel mixture.
  3. Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to the incorrect air-fuel ratio.
  4. Increased Emissions: A malfunctioning NOx sensor can cause the vehicle to emit higher levels of nitrogen oxides, leading to increased emissions.

How to Fix P116D 2016 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and perform a thorough inspection of the O2 pump current control circuit and NOx sensor.
  2. Replace the NOx Sensor: If the sensor is found to be faulty, replace it with a new, OEM-quality sensor.
  3. Repair Wiring or Connectors: Repair any damaged wiring or connectors in the circuit to ensure proper current flow.
  4. Check ECM Functionality: Test the ECM to ensure it is functioning correctly and reprogram it if necessary.
  5. Clear Codes and Test Drive: Clear the trouble codes from the ECM, and take the vehicle for a test drive to ensure the issue has been resolved.

Cost to Fix P116D 2016 GMC Sierra

The typical repair costs for addressing the P116D code in a 2016 GMC Sierra can range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.

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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 2016 GMC Sierra Code

1. What does the OBDII code P116D mean on a 2016 GMC Sierra?

The P116D code refers to an issue with the oxygen (O2) pump current control circuit for NOx Sensor 1, indicating a potential fault in the sensor or its wiring.

2. What are the common symptoms of OBDII code P116D on a GMC Sierra?

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, or the vehicle entering limp mode.

3. What causes the P116D code to appear on a 2016 GMC Sierra?

The most common causes are a faulty NOx Sensor 1, damaged wiring or connectors in the O2 pump control circuit, or a malfunctioning engine control module (ECM).

4. How can I diagnose the P116D code on my GMC Sierra?

Diagnosis typically involves scanning for codes, inspecting the NOx sensor and its wiring for damage, and testing the circuit’s voltage and resistance with a multimeter.

5. Can I drive my 2016 GMC Sierra with a P116D code?

While the vehicle may still be drivable, it is not recommended as it could lead to reduced performance, increased emissions, and potential damage to the emissions system.

6. How do I fix the P116D code on my GMC Sierra?

Repairs may include replacing the faulty NOx Sensor 1, repairing damaged wiring or connectors, or reprogramming/updating the ECM if necessary.

7. How much does it cost to fix a P116D code on a 2016 GMC Sierra?

The repair cost can vary but typically ranges from $300 to $700, depending on whether the NOx sensor needs replacement or if additional wiring repairs are required.

8. Can a dirty NOx sensor cause the P116D code?

Yes, a contaminated or clogged NOx sensor can cause the circuit to malfunction and trigger the P116D code.

9. How do I prevent the P116D code from recurring?

Regular maintenance, ensuring high-quality fuel, and promptly addressing any check engine light issues can help prevent this code from returning.

10. Do I need to replace the NOx sensor if I get a P116D code?

Not always; the issue could be related to wiring or the ECM. Proper diagnosis is necessary to confirm if the sensor itself is faulty.

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