AutoCodes – Chevrolet – P115E Chevrolet

P115E Chevrolet 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 Chevrolet 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 892

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
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Code P115E 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 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 Chevrolet - O2 Reference Voltage Circuit (NOx Sensor 1) - AutoCodes.com — P115E Chevrolet Code - O2 Reference Voltage Circuit (NOx Sensor 1)

What does this mean?

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

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

Need Help with the Code?

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Information for Specific Chevrolet Models

P115E 2014 Chevrolet Silverado — O2 Reference Voltage Circuit (NOx Sensor 1)
P115E 2015 Chevrolet Silverado — O2 Reference Voltage Circuit (NOx Sensor 1)
P115E 2016 Chevrolet Silverado — O2 Reference Voltage Circuit (NOx Sensor 1)
P115E 2017 Chevrolet Silverado — O2 Reference Voltage Circuit (NOx Sensor 1)
P115E 2018 Chevrolet Silverado — O2 Reference Voltage Circuit (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 P115E Chevrolet Code

1. What are the common symptoms of OBDII code P115E in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

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

2. What are some possible causes of OBDII code P115E related to the O2 Reference Voltage Circuit (NOx Sensor 1) in a Chevrolet?

- Potential causes can include a faulty NOx sensor, damaged wiring or connectors in the O2 sensor circuit, issues with the powertrain control module (PCM), or a malfunctioning NOx sensor heater element.

3. How can I diagnose OBDII code P115E in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, conducting a visual inspection of the sensor and its wiring, checking for voltage and continuity, and performing any necessary tests recommended by the manufacturer.

4. Is it safe to continue driving with OBDII code P115E related to the O2 Reference Voltage Circuit (NOx Sensor 1) in a Chevrolet?

- It is generally not recommended to drive with this code present, as it can lead to poor engine performance and potentially cause further damage to the vehicle. It is advisable to address the issue promptly.

5. Can I repair OBDII code P115E myself in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

- Depending on your level of automotive knowledge and skills, you may be able to address this issue yourself by replacing the NOx sensor, checking and repairing any damaged wiring, or resetting the PCM after making necessary repairs. However, professional assistance is recommended if you are unsure.

6. Are there any specific repair tips for fixing OBDII code P115E in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

- It is advisable to follow the manufacturer's diagnostic procedures, use high-quality replacement parts, ensure proper connection and routing of wiring, and clear the fault code after completing the repairs to reset the system.

7. How much does it typically cost to repair OBDII code P115E related to the O2 Reference Voltage Circuit (NOx Sensor 1) in a Chevrolet?

- The cost of repairs can vary depending on the specific cause of the issue, the cost of replacement parts, labor charges, and whether you choose to address the problem yourself or take your vehicle to a professional mechanic. It's recommended to obtain quotes from different repair shops for an accurate estimate.

8. Can a faulty NOx sensor trigger OBDII code P115E in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

- Yes, a faulty NOx sensor is one of the potential causes that can trigger this OBDII code, indicating an issue with the O2 reference voltage circuit related to NOx Sensor 1 in a Chevrolet.

9. How urgent is it to address OBDII code P115E in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

- It is advisable to address this code promptly to prevent any further damage to the vehicle, ensure optimal engine performance, and maintain fuel efficiency. Ignoring the issue can lead to more severe problems over time.

10. Can resetting the PCM resolve OBDII code P115E in a Chevrolet related to the O2 Reference Voltage Circuit (NOx Sensor 1)?

- In some cases, resetting the PCM after making necessary repairs can help clear the fault code and reset the system. However, if the underlying issue is not fixed, the code is likely to reappear.