AutoCodes – Buick – P116F Buick

P116F Buick 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 Buick 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 553

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

What does this mean?

What are the Possible Causes of the DTC P116F Buick?

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 Buick?

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 Buick 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.

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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 P116F Buick Code

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

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and illuminated check engine light.

2. What can cause the OBDII code P116F in a Buick?

- The code P116F is typically triggered by a malfunction in the O2 pump current control circuit, often due to wiring issues, a faulty NOx sensor, or a problem with the NOx module.

3. How serious is the O2 pump current control circuit high voltage issue in a Buick?

- While the issue may not cause immediate harm to the vehicle, it can lead to increased exhaust emissions and potential long-term damage to the engine or emissions system if left unrepaired.

4. How can I diagnose the OBDII code P116F in my Buick?

- To diagnose the code P116F, a thorough inspection of the NOx sensor, wiring, and associated components is necessary. Using an OBDII scanner to retrieve and interpret the code is also recommended.

5. Can I continue driving my Buick with the O2 pump current control circuit high voltage issue?

- It is generally not recommended to continue driving the vehicle with an active OBDII code like P116F, as it can lead to further damage and potential safety risks. It is best to address the issue promptly.

6. How can I repair the OBDII code P116F in my Buick?

- Repairing the P116F code usually involves fixing the underlying issue with the O2 pump current control circuit, which may require repairing or replacing wiring, the NOx sensor, or the NOx module.

7. Is it possible to reset the OBDII code P116F in a Buick without fixing the issue?

- While you can reset the code using an OBDII scanner, the underlying problem causing the P116F code will persist unless properly diagnosed and repaired.

8. Are there any DIY tips for addressing the O2 pump current control circuit high voltage issue in a Buick?

- DIY tips for addressing the P116F code include checking for loose or damaged wiring, ensuring proper sensor connections, and inspecting for any visible signs of damage in the NOx sensor system.

9. How much does it typically cost to repair the O2 pump current control circuit high voltage issue in a Buick?

- The cost of repairing the P116F code can vary depending on the underlying cause and the extent of the damage. Repairs may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a mechanic help me resolve the O2 pump current control circuit high voltage issue in my Buick?

- Yes, a qualified mechanic with experience in diagnosing and repairing automotive electrical issues should be able to help you resolve the OBDII code P116F in your Buick efficiently and effectively.