AutoCodes – Chevrolet – P116E 2018 Chevrolet Silverado

P116E 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 251

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 24, 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1) - AutoCodes.com — P116E 2018 Chevrolet Silverado Code - O2 Pump Current Control Circuit Low Voltage (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P116E 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P116E 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P116E 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2018 Chevrolet Silverado Code

1. What does the OBDII code P116E mean for a 2018 Chevrolet Silverado?

The code P116E indicates "O2 Pump Current Control Circuit Low Voltage" related to NOx Sensor 1, which monitors nitrogen oxide levels in the exhaust system.

2. What are common symptoms of the P116E code?

Symptoms may include a check engine light, reduced fuel efficiency, diminished engine performance, and issues with emissions compliance.

3. What causes the P116E code to appear?

Common causes include a faulty NOx sensor, wiring issues, poor electrical connections, or a malfunctioning engine control module (ECM).

4. Can driving with the P116E code damage my vehicle?

Prolonged driving with this code can increase emissions and may lead to engine performance problems, but immediate damage is unlikely unless other issues are also present.

5. How do I diagnose the P116E code?

Use an OBDII scanner to confirm the code, perform a visual inspection of the NOx sensor and wiring, and check for proper voltage and continuity in the circuit.

6. How do I fix the P116E code?

Repairs may include replacing the NOx sensor, repairing damaged wiring, ensuring proper electrical connections, or reprogramming the ECM if necessary.

7. How much does it cost to repair the P116E code?

Costs vary depending on the issue, but replacing a NOx sensor typically ranges from $300 to $600, including parts and labor.

8. Can a dirty exhaust system cause the P116E code?

While unlikely, excessive soot buildup can interfere with NOx sensor readings, though the issue typically lies with the sensor or circuit itself.

9. Is the P116E code related to fuel quality?

Poor fuel quality can contribute to higher NOx emissions, but it is not a direct cause of the P116E code.

10. Do I need a mechanic to fix the P116E code?

If you're comfortable with electrical diagnostics and sensor replacement, you can attempt the repair yourself. Otherwise, it's best to seek professional assistance.