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P116A 2016 Chevrolet Silverado Code - O2 Signal Circuit (NOx Sensor 1)

Quick Answer

The P116A code for a 2016 Chevrolet Silverado specifically relates to the O2 signal circuit for the NOx sensor 1. Common causes include Faulty NOx Sensor: The NOx sensor itself may be malfunctioning, leading to inaccurate readings being sent to the ECM, Wiring Issues: Problems with the wiring connecting the NOx sensor to the ECM can cause signal disruptions, ECM Malfunction: If the ECM is not functioning correctly, it may not be able to properly interpret the signals from the NOx sensor. 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
P116A 2016 Chevrolet Silverado indicates O2 Signal Circuit (NOx Sensor 1).
Common causes
Common causes include Faulty NOx Sensor: The NOx sensor itself may be malfunctioning, leading to inaccurate readings being sent to the ECM, Wiring Issues: Problems with the wiring connecting the NOx sensor to the ECM can cause signal disruptions, ECM Malfunction: If the ECM is not functioning correctly, it may not be able to properly interpret the signals from the NOx sensor.
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 10, 2024
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Code P116A 2016 Chevrolet Silverado Description

The P116A code for a 2016 Chevrolet Silverado specifically relates to the O2 signal circuit for the NOx sensor 1. The NOx sensor is responsible for monitoring the levels of nitrogen oxide in the exhaust gases. This sensor is crucial for ensuring that the vehicle meets emission standards and operates efficiently. When the O2 signal circuit for the NOx sensor 1 is not functioning properly, it can lead to issues with the vehicle's emissions, fuel efficiency, and overall performance.

OBDII Code P116A 2016 Chevrolet Silverado - O2 Signal Circuit (NOx Sensor 1)
P116A 2016 Chevrolet Silverado Code - O2 Signal Circuit (NOx Sensor 1)

Common Causes of P116A 2016 Chevrolet Silverado

  1. Faulty NOx Sensor: The NOx sensor itself may be malfunctioning, leading to inaccurate readings being sent to the ECM.
  2. Wiring Issues: Problems with the wiring connecting the NOx sensor to the ECM can cause signal disruptions.
  3. ECM Malfunction: If the ECM is not functioning correctly, it may not be able to properly interpret the signals from the NOx sensor.
  4. Exhaust System Leaks: Any leaks in the exhaust system can also affect the NOx sensor's readings.

Symptoms of P116A 2016 Chevrolet Silverado

  1. Check Engine Light: The most obvious symptom of this code is the illumination of the check engine light on the dashboard.
  2. Reduced Fuel Efficiency: A faulty NOx sensor can cause the vehicle to consume more fuel than usual.
  3. Poor Performance: The vehicle may experience a decrease in performance, such as rough idling or hesitation during acceleration.
  4. Failed Emissions Test: If the NOx levels are not being properly monitored, the vehicle may fail an emissions test.

How to Fix P116A 2016 Chevrolet Silverado

  1. Diagnostic Testing: The first step in addressing this code is to perform diagnostic testing to determine the exact cause of the issue.
  2. Replace NOx Sensor: If the sensor is found to be faulty, it will need to be replaced with a new one.
  3. Check Wiring: Inspect the wiring connecting the NOx sensor to the ECM for any damage or corrosion, and repair or replace as necessary.
  4. ECM Reprogramming: In some cases, the ECM may need to be reprogrammed to ensure it is properly receiving and interpreting signals from the NOx sensor.
  5. Clear Codes: Once the repairs have been completed, the codes can be cleared from the vehicle's system to reset the check engine light.

Cost to Fix P116A 2016 Chevrolet Silverado

The cost of repairing the O2 signal circuit for the NOx sensor 1 can vary depending on the exact cause of the issue and the cost of parts and labor. On average, the cost for this repair can range from $200 to $600. It's important to note that this is a rough estimate, and the actual cost may be higher or lower based on the specific circumstances of the vehicle. Additionally, labor rates at auto repair shops can vary, so it's advisable to check with local shops for more accurate pricing information.

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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 P116A 2016 Chevrolet Silverado Code

1. What does the OBDII code P116A mean on a 2016 Chevrolet Silverado?

P116A indicates an issue with the O2 signal circuit related to NOx Sensor 1, which monitors nitrogen oxide levels in the exhaust system.

2. What are the common symptoms of code P116A in a 2016 Chevrolet Silverado?

Common symptoms include poor fuel efficiency, reduced engine performance, an illuminated check engine light, and possible difficulty passing emissions tests.

3. What causes the P116A code to appear on a 2016 Chevrolet Silverado?

Possible causes include a faulty NOx sensor, damaged wiring or connectors in the O2 signal circuit, excessive exhaust contamination, or a malfunctioning engine control module (ECM).

4. How can I diagnose the P116A code on my Silverado?

Start by scanning for codes with an OBDII scanner, visually inspecting the NOx sensor wiring and connectors, and testing the sensor with a multimeter to ensure proper voltage and continuity.

5. Can I drive my 2016 Chevrolet Silverado with a P116A code?

While the vehicle may still be drivable, ignoring the code can lead to further engine or emissions system damage and reduced efficiency over time.

6. How do I fix the P116A code on a 2016 Chevrolet Silverado?

Repairs may include replacing the faulty NOx sensor, repairing or replacing damaged wiring, cleaning the exhaust system, or reprogramming/updating the ECM if necessary.

7. How much does it cost to repair the P116A code on a Silverado?

The cost varies, but replacing the NOx sensor typically ranges from $300 to $700, depending on labor and parts pricing.

8. Can a dirty exhaust system cause the P116A code?

Yes, excessive soot or contamination in the exhaust system can interfere with the NOx sensor's ability to function properly and trigger the code.

9. Does the P116A code require reprogramming the ECM?

Reprogramming the ECM is not always required, but if the issue is related to outdated or corrupted software, it may be necessary.

10. How can I prevent the P116A code from reoccurring?

Regular maintenance, using high-quality fuel, and addressing exhaust system issues promptly can help prevent the code from reoccurring.

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