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Engine-Codes – GMC – P115E 2017 GMC Sierra

P115E 2017 GMC Sierra Code - O2 Reference Voltage Circuit (NOx Sensor 1)

Quick Answer

The P115E diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the O2 reference voltage circuit for NOx sensor 1. Common causes include Faulty oxygen sensor, Wiring issues in the O2 sensor circuit, ECM malfunction. 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 2017 GMC Sierra indicates O2 Reference Voltage Circuit (NOx Sensor 1).
Common causes
Common causes include Faulty oxygen sensor, Wiring issues in the O2 sensor circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P115E 2017 GMC Sierra Description

The P115E diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the O2 reference voltage circuit for NOx sensor 1. This code indicates an issue with the oxygen sensor's reference voltage circuit that is responsible for monitoring and regulating the amount of nitrogen oxide (NOx) emissions in the vehicle's exhaust system. The NOx sensor plays a crucial role in ensuring that the vehicle meets emission standards and operates efficiently.

OBDII Code P115E 2017 GMC Sierra - O2 Reference Voltage Circuit (NOx Sensor 1)
P115E 2017 GMC Sierra Code - O2 Reference Voltage Circuit (NOx Sensor 1)

Common Causes of P115E 2017 GMC Sierra

  1. Faulty oxygen sensor
  2. Wiring issues in the O2 sensor circuit
  3. ECM malfunction
  4. Exhaust system leaks
  5. Contaminated fuel

Symptoms of P115E 2017 GMC Sierra

  1. Rough idling or engine misfires
  2. Decreased fuel efficiency
  3. Check Engine Light illuminated
  4. Failed emissions test
  5. Reduced engine power

How to Fix P115E 2017 GMC Sierra

  1. Diagnose the issue using a scan tool to confirm the P115E code and pinpoint the exact cause of the problem.
  2. Inspect the wiring and connections in the O2 sensor circuit for any damage or corrosion. Repair or replace as needed.
  3. Test the NOx sensor for proper operation and replace if faulty.
  4. Check the ECM for any software updates or malfunctions that may be causing the issue.
  5. Clear the code and perform a test drive to ensure the problem has been resolved.

Cost to Fix P115E 2017 GMC Sierra

The typical repair costs for addressing a P115E code on a 2017 GMC Sierra can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing.

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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 2017 GMC Sierra Code

1. What does the OBDII code P115E mean on a 2017 GMC Sierra?

The P115E code indicates an issue with the O2 Reference Voltage Circuit for NOx Sensor 1, which monitors the oxygen levels in the exhaust to optimize emissions.

2. What are the common symptoms of code P115E in a 2017 GMC Sierra?

Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, and potentially a failed emissions test.

3. What causes the P115E code to appear?

Common causes include a faulty NOx sensor, damaged wiring or connectors in the sensor circuit, or issues with the vehicle’s powertrain control module (PCM).

4. Can I drive my 2017 GMC Sierra with the P115E code active?

While the vehicle may still be drivable, ignoring the code can lead to reduced performance, increased emissions, and potential damage to the catalytic converter.

5. How is the P115E code diagnosed?

A technician will use a scan tool to confirm the code, inspect the NOx sensor and its wiring, and test the reference voltage and ground connections for the circuit.

6. How do you fix the P115E code in a 2017 GMC Sierra?

Repairs typically involve replacing the faulty NOx sensor, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. How much does it cost to repair the P115E code on a 2017 GMC Sierra?

Repair costs vary, but replacing a NOx sensor can range from $300 to $600, depending on parts and labor costs.

8. What happens if the P115E code is not resolved?

If left unresolved, the vehicle could experience worsened fuel efficiency, higher emissions, and potential long-term damage to the emissions system.

9. Can a dirty or contaminated NOx sensor cause the P115E code?

Yes, a dirty or contaminated NOx sensor can affect its performance and trigger the P115E code.

10. Does the P115E code always mean the NOx sensor is bad?

No, the issue could also stem from damaged wiring, poor electrical connections, or a malfunctioning PCM. Proper diagnosis is essential.

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