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P116E GMC Code - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)

Quick Answer

The P116E GMC diagnostic trouble code (DTC) indicates an issue with the O2 pump current control circuit's low voltage, specifically relating to the NOx sensor 1. Common causes include Faulty O2 Pump Current Control Circuit: A malfunction in the O2 pump current control circuit can cause low voltage readings, triggering this code, Wiring Issues: Damaged or corroded wiring connecting the NOx sensor to the control module can disrupt the voltage signal, Sensor Malfunction: A faulty NOx sensor itself can also cause low voltage readings and trigger this 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
P116E GMC indicates O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1).
Common causes
Common causes include Faulty O2 Pump Current Control Circuit: A malfunction in the O2 pump current control circuit can cause low voltage readings, triggering this code, Wiring Issues: Damaged or corroded wiring connecting the NOx sensor to the control module can disrupt the voltage signal, Sensor Malfunction: A faulty NOx sensor itself can also cause low voltage readings and trigger this 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 Aug 19, 2024
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Code P116E GMC Description

The P116E GMC diagnostic trouble code (DTC) indicates an issue with the O2 pump current control circuit's low voltage, specifically relating to the NOx sensor 1. This code is typically found in vehicles equipped with advanced emissions control systems, such as newer GMC models. The NOx sensor is responsible for monitoring the nitrogen oxide levels in the exhaust gases and adjusting the air-fuel mixture to reduce harmful emissions. When the O2 pump current control circuit experiences low voltage, it can lead to improper sensor readings, affecting the vehicle's performance and emissions output.

OBDII Code P116E GMC - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)
P116E GMC Code - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)

Common Causes of P116E GMC

  1. Faulty O2 Pump Current Control Circuit: A malfunction in the O2 pump current control circuit can cause low voltage readings, triggering this code.
  2. Wiring Issues: Damaged or corroded wiring connecting the NOx sensor to the control module can disrupt the voltage signal.
  3. Sensor Malfunction: A faulty NOx sensor itself can also cause low voltage readings and trigger this code.
  4. Exhaust System Leaks: Leaks in the exhaust system can affect sensor readings and lead to incorrect voltage levels.

Symptoms of P116E GMC

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A decrease in fuel efficiency may occur due to the engine running rich or lean as a result of incorrect sensor readings.
  3. Rough Idling: The engine may experience rough idling or hesitation during acceleration due to the incorrect air-fuel mixture.
  4. Failed Emissions Test: Vehicles with this code may fail emissions tests due to higher levels of nitrogen oxide emissions.

How to Fix P116E GMC

  1. Diagnose the Issue: Use a diagnostic scanner to pinpoint the exact cause of the low voltage in the O2 pump current control circuit.
  2. Check Wiring and Connections: Inspect the wiring and connections related to the NOx sensor for any damage or corrosion and repair as necessary.
  3. Test NOx Sensor: Test the NOx sensor itself to determine if it is functioning properly and replace if needed.
  4. Clear Codes: Clear the DTC and reset the vehicle's computer after completing the repairs to see if the issue has been resolved.
  5. Perform Emissions Test: After repairs are completed, it is advisable to conduct an emissions test to ensure the vehicle meets regulatory standards.

Cost to Fix P116E GMC

The typical repair costs for addressing the P116E GMC code can vary depending on the exact cause of the issue. On average, the cost of parts and labor for this repair can range from $200 to $500. However, as mentioned earlier, specific diagnosis time and labor rates at auto repair shops can fluctuate based on various factors. It is recommended to consult with a local mechanic or dealership for a more accurate estimate.

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Information for Specific GMC Models

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 P116E GMC Code

1. What are common symptoms of OBDII code P116E GMC?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine light.

2. What can cause the OBDII code P116E GMC to trigger?

- The code P116E GMC is typically triggered by a malfunction in the O2 pump current control circuit, specifically low voltage in the NOx Sensor 1.

3. How serious is the O2 Pump Current Control Circuit Low Voltage fault?

- This fault can affect the vehicle's emissions control system and may lead to increased emissions output. While the vehicle may still be drivable, it is recommended to have the issue diagnosed and repaired promptly.

4. Can a faulty oxygen sensor cause code P116E to appear?

- Yes, a faulty NOx Sensor 1, which is an oxygen sensor, can cause the OBDII code P116E GMC to appear due to low voltage in the O2 pump current control circuit.

5. What are some diagnostic steps to address code P116E related to the NOx Sensor 1?

- Diagnostic steps may include checking the wiring and connections related to the NOx Sensor 1, testing the sensor's voltage output, and ensuring the O2 pump current control circuit is functioning properly.

6. How can I repair OBDII code P116E GMC related to the O2 pump current control circuit?

- Repairing code P116E may involve replacing the NOx Sensor 1, repairing any damaged wiring or connections, and resetting the fault code with an OBDII scanner after the repairs.

7. Is it safe to continue driving with the O2 Pump Current Control Circuit Low Voltage fault?

- While the vehicle may still be operational, continued driving with this fault can lead to increased emissions and potential long-term damage to the emissions control system. It is recommended to address the issue as soon as possible.

8. Are there any DIY tips for troubleshooting code P116E GMC?

- DIY troubleshooting tips may include visually inspecting the wiring and connections related to the NOx Sensor 1, checking for any visible damage or corrosion, and ensuring proper sensor operation.

9. Can a malfunctioning catalytic converter trigger code P116E GMC?

- A malfunctioning catalytic converter may indirectly contribute to the triggering of code P116E GMC if it affects the overall efficiency of the emissions control system, leading to issues with the NOx Sensor 1.

10. How can I prevent the recurrence of OBDII code P116E GMC in the future?

- Regular maintenance, including checking and replacing oxygen sensors as recommended, keeping the emissions control system in good condition, and addressing any related issues promptly, can help prevent the recurrence of code P116E in the future.

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