AutoCodes – Chevrolet – P116E Chevrolet

P116E Chevrolet Code - O2 Pump Current Control Circuit Low 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: P116E Chevrolet indicates O2 Pump Current Control Circuit Low 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 789

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P116E Chevrolet 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 P116E Chevrolet - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1) - AutoCodes.com — P116E Chevrolet Code - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116E Chevrolet?

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 P116E Chevrolet?

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 P116E Chevrolet 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.

Need more information about the P116E Chevrolet code?

Need more information on how to fix the P116E Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P116E Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P116E 2014 Chevrolet Silverado — O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)
P116E 2015 Chevrolet Silverado — O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)
P116E 2016 Chevrolet Silverado — O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)
P116E 2017 Chevrolet Silverado — O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)
P116E 2018 Chevrolet Silverado — O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)

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 Chevrolet Code

1. What are the common symptoms of OBDII code P116E Chevrolet (O2 Pump Current Control Circuit Low Voltage)?

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

2. What are the possible causes of the P116E code in a Chevrolet vehicle?

- The code P116E can be triggered by issues such as a faulty NOx sensor, damaged wiring or connectors, a malfunctioning O2 pump, or a problem with the engine control module (ECM).

3. How can I diagnose the O2 Pump Current Control Circuit Low Voltage issue in my Chevrolet?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the NOx sensor and O2 pump for functionality, inspecting wiring and connectors for damage, and testing the ECM.

4. Can I continue driving my Chevrolet with the P116E trouble code?

- It is not recommended to drive with the P116E code present, as it can lead to further damage to the vehicle and potentially cause more serious issues over time.

5. Are there any DIY repair tips for fixing the O2 Pump Current Control Circuit Low Voltage problem?

- DIY repairs may include checking and cleaning the NOx sensor and O2 pump connectors, inspecting wiring for breaks or corrosion, and resetting the ECM to see if the code clears.

6. How much does it typically cost to repair the P116E code in a Chevrolet vehicle?

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

7. Can a faulty NOx sensor trigger the P116E code in a Chevrolet?

- Yes, a malfunctioning NOx sensor is a common cause of the P116E trouble code, as it can affect the O2 pump current control circuit and lead to low voltage issues.

8. Will resetting the check engine light make the P116E code disappear permanently?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear after some driving cycles.

9. Is it safe to drive my Chevrolet if the P116E code keeps coming back after repairs?

- It is not recommended to drive the vehicle if the P116E code persists after repairs, as it indicates an ongoing issue that needs to be properly addressed to ensure safe operation.

10. How important is it to address the O2 Pump Current Control Circuit Low Voltage problem in a Chevrolet promptly?

- It is essential to address the P116E code promptly to prevent further damage to the vehicle, ensure optimal engine performance, and maintain fuel efficiency.