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

Quick Answer

The P116E diagnostic trouble code (DTC) for Buick vehicles indicates an issue with the O2 pump current control circuit, specifically low voltage detected in the NOx (nitrogen oxide) sensor 1. Common causes include Faulty O2 pump current control circuit, Damaged wiring or connectors in the NOx sensor circuit, Malfunctioning 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
P116E Buick indicates O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1).
Common causes
Common causes include Faulty O2 pump current control circuit, Damaged wiring or connectors in the NOx sensor circuit, Malfunctioning 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 P116E Buick Description

The P116E diagnostic trouble code (DTC) for Buick vehicles indicates an issue with the O2 pump current control circuit, specifically low voltage detected in the NOx (nitrogen oxide) sensor 1. The NOx sensor is responsible for monitoring the level of nitrogen oxides in the exhaust gases and plays a crucial role in ensuring the vehicle meets emissions standards. The O2 pump current control circuit is designed to regulate the current flow to the NOx sensor, allowing it to accurately measure the concentration of nitrogen oxides in the exhaust gas.

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

Common Causes of P116E Buick

  1. Faulty O2 pump current control circuit
  2. Damaged wiring or connectors in the NOx sensor circuit
  3. Malfunctioning NOx sensor
  4. Issues with the engine control module (ECM)
  5. Exhaust system leaks

Symptoms of P116E Buick

  1. Illumination of the check engine light
  2. Reduced fuel efficiency
  3. Poor engine performance
  4. Failed emissions test
  5. Rough idling or stalling

How to Fix P116E Buick

  1. Diagnose the O2 pump current control circuit using a scan tool to pinpoint the exact cause of the low voltage issue.
  2. Inspect the wiring and connectors in the NOx sensor circuit for any signs of damage or corrosion.
  3. Test the NOx sensor's functionality and replace it if necessary.
  4. Check the ECM for any faults or software updates that may be required.
  5. Repair any exhaust system leaks that could be affecting the NOx sensor's performance.

Cost to Fix P116E Buick

The cost of repairing a P116E DTC on a Buick vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts required for this repair, such as a new NOx sensor or wiring harness, can range from $100 to $300. Labor costs can add an additional $100 to $200, bringing the total repair cost to approximately $200 to $500. Keep in mind that these are estimates, and actual repair costs may differ based on the complexity of the repair and the rates charged by your chosen auto repair shop. It is recommended to obtain quotes from multiple reputable shops to ensure you receive a fair price for the repair.

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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 P116E Buick Code

1. What are the common symptoms of OBDII code P116E in a Buick related to the O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)?

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

2. What are some possible causes of OBDII code P116E in a Buick?

- Possible causes may include a faulty NOx sensor, damaged wiring or connectors in the O2 pump current control circuit, or issues with the vehicle's engine control module.

3. How can I diagnose OBDII code P116E in my Buick?

- Diagnosis typically involves using an OBDII scanner to retrieve the fault code, inspecting the NOx sensor and related wiring for damage, and testing the O2 pump current control circuit for proper voltage.

4. What are the repair options for OBDII code P116E in a Buick?

- Repair options may include replacing the faulty NOx sensor, repairing or replacing damaged wiring or connectors, or reprogramming the engine control module if necessary.

5. Can I drive my Buick with OBDII code P116E present?

- It is not recommended to drive your vehicle with this fault code present, as it can lead to further engine damage and potentially worsen fuel efficiency.

6. Will resetting the check engine light resolve OBDII code P116E in a Buick?

- Resetting the check engine light may temporarily turn it off, but the underlying issue causing the fault code will still need to be diagnosed and repaired to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P116E in a Buick?

- The cost of repairs for this code can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P116E in a Buick?

- While some experienced DIY enthusiasts may be able to diagnose and repair this issue themselves, it is recommended to seek professional help, especially when dealing with complex electrical systems like the O2 pump current control circuit.

9. How long does it take to repair OBDII code P116E in a Buick?

- The repair time can vary depending on the exact cause of the fault, availability of parts, and the skill level of the mechanic. It may take anywhere from a few hours to a full day to complete the repair.

10. Is OBDII code P116E a common issue in Buick vehicles?

- While it may not be as common as some other OBDII codes, P116E related to the O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1) can still occur in Buick vehicles, especially as they age and components wear out.

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