AutoCodes – Chevrolet – P115F 2017 Chevrolet Silverado

P115F 2017 Chevrolet Silverado Code - O2 Reference Voltage 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: P115F 2017 Chevrolet Silverado indicates O2 Reference Voltage 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.

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Code Popularity 180

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
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Code P115F 2017 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 P115F 2017 Chevrolet Silverado - O2 Reference Voltage Circuit Low Voltage (NOx Sensor 1) - AutoCodes.com — P115F 2017 Chevrolet Silverado Code - O2 Reference Voltage Circuit Low Voltage (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P115F 2017 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 P115F 2017 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 P115F 2017 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 P115F 2017 Chevrolet Silverado code?

Need more information on how to fix the P115F 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P115F 2017 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 P115F 2017 Chevrolet Silverado Code

1. What does the OBDII code P115F mean on a 2017 Chevrolet Silverado?

P115F indicates "O2 Reference Voltage Circuit Low Voltage" related to NOx Sensor 1, meaning the sensor is detecting an issue with the reference voltage for proper operation.

2. What are the symptoms of code P115F on a 2017 Chevrolet Silverado?

Common symptoms include the check engine light turning on, reduced fuel efficiency, poor engine performance, and potentially the truck entering limp mode.

3. What causes the P115F code on a 2017 Chevrolet Silverado?

Possible causes include a faulty NOx sensor, damaged wiring or connectors in the O2 reference voltage circuit, a malfunctioning ECM, or issues with the exhaust system.

4. Can I drive my 2017 Silverado with a P115F code?

While the vehicle may still be drivable, it is not recommended as it can lead to reduced performance, increased emissions, and potential damage to other components if left unresolved.

5. How do I diagnose the P115F code on my 2017 Chevrolet Silverado?

Diagnosis involves checking the NOx sensor and its wiring for damage, testing the reference voltage at the sensor, and using a scan tool to monitor live data for abnormalities in the exhaust system.

6. How do I fix the P115F code on a 2017 Chevrolet Silverado?

Repairs may include replacing the faulty NOx sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

7. What is the NOx sensor, and why is it important for the P115F code?

The NOx sensor measures nitrogen oxide levels in the exhaust to ensure proper emission control and engine efficiency. A failure can disrupt emissions compliance and performance.

8. How much does it cost to repair a P115F code on a 2017 Chevrolet Silverado?

Repair costs vary depending on the issue. Replacing a NOx sensor typically costs $200-$600, while wiring repairs or ECM replacements can increase the cost.

9. Can a dirty exhaust system cause the P115F code?

Yes, excessive soot or carbon buildup in the exhaust system can affect the NOx sensor's readings and lead to this code.

10. Do I need to clear the P115F code after repairs on my 2017 Silverado?

Yes, after completing repairs, use an OBDII scan tool to clear the code and confirm that it does not return during a test drive.

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