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AutoCodes – Chevrolet – P115E 2016 Chevrolet Silverado

P115E 2016 Chevrolet Silverado Code - O2 Reference Voltage Circuit (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
P115E 2016 Chevrolet Silverado indicates O2 Reference Voltage Circuit (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 223
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Mar 24, 2024
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Code P115E 2016 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 the 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 P115E 2016 Chevrolet Silverado - O2 Reference Voltage Circuit (NOx Sensor 1) - AutoCodes.com
P115E 2016 Chevrolet Silverado Code - O2 Reference Voltage Circuit (NOx Sensor 1)
What does this mean?

What are the Possible Causes of the DTC P115E 2016 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 P115E 2016 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 P115E 2016 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 P115E 2016 Chevrolet Silverado code?

Need more information on how to fix the P115E 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P115E 2016 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 P115E 2016 Chevrolet Silverado Code

1. What does the OBDII code P115E mean on a 2016 Chevrolet Silverado?

P115E indicates an issue with the O2 reference voltage circuit for NOx Sensor 1, which monitors nitrogen oxide levels in the exhaust system.

2. What are the common symptoms of P115E in a 2016 Chevrolet Silverado?

Symptoms may include the check engine light turning on, poor fuel economy, reduced engine performance, or the vehicle entering limp mode.

3. What causes the P115E code to appear on a 2016 Chevrolet Silverado?

Possible causes include a faulty NOx sensor, damaged wiring or connectors in the O2 reference voltage circuit, or a malfunction in the engine control module (ECM).

4. Can I drive my 2016 Chevrolet Silverado with a P115E code?

Driving with a P115E code is not recommended, as it can lead to reduced engine performance and potential damage to the emission system over time.

5. How do you diagnose the P115E code on a 2016 Chevrolet Silverado?

Diagnosis involves scanning for codes, inspecting the NOx sensor and its wiring, testing the reference voltage signal, and checking for ECM-related faults.

6. How can I fix the P115E code on my 2016 Chevrolet Silverado?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring, resetting the ECM, or updating its software if needed.

7. What does the O2 reference voltage circuit do in the NOx sensor?

The O2 reference voltage circuit supplies a stable voltage for the NOx sensor to measure oxygen levels and NOx emissions accurately.

8. How much does it cost to repair the P115E code on a 2016 Chevrolet Silverado?

The repair cost can range from $200 to $700, depending on whether the NOx sensor, wiring, or ECM requires replacement or repair.

9. Can a bad NOx sensor cause the P115E code in a 2016 Chevrolet Silverado?

Yes, a malfunctioning NOx sensor is one of the most common causes of the P115E code.

10. Is the P115E code covered under warranty for a 2016 Chevrolet Silverado?

It may be covered under the emissions warranty, depending on your vehicle’s mileage and warranty terms. Check with your dealership for details.

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