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Engine-Codes – GMC – P165C 2014 GMC Sierra

P165C 2014 GMC Sierra Code - Sensor Reference Voltage Status Message Counter Incorrect

Quick Answer

The diagnostic trouble code P165C for a 2014 GMC Sierra indicates that the Sensor Reference Voltage Status Message Counter is incorrect. Common causes include Faulty sensor in the sensor reference voltage system, Wiring issues in the sensor reference voltage circuit, Malfunctioning ECM. 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
P165C 2014 GMC Sierra indicates Sensor Reference Voltage Status Message Counter Incorrect.
Common causes
Common causes include Faulty sensor in the sensor reference voltage system, Wiring issues in the sensor reference voltage circuit, Malfunctioning ECM.
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 13, 2024
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Code P165C 2014 GMC Sierra Description

The diagnostic trouble code P165C for a 2014 GMC Sierra indicates that the Sensor Reference Voltage Status Message Counter is incorrect. This code typically points to an issue with the sensor reference voltage system in the vehicle. The sensor reference voltage is a crucial component that provides power to various sensors in the vehicle, allowing them to function properly and send data to the engine control module (ECM). When the message counter for the sensor reference voltage is incorrect, it means that the ECM is not receiving the expected number of messages from the sensors, which can lead to performance issues and potential long-term damage if not addressed promptly.

OBDII Code P165C 2014 GMC Sierra - Sensor Reference Voltage Status Message Counter Incorrect
P165C 2014 GMC Sierra Code - Sensor Reference Voltage Status Message Counter Incorrect

Common Causes of P165C 2014 GMC Sierra

  1. Faulty sensor in the sensor reference voltage system
  2. Wiring issues in the sensor reference voltage circuit
  3. Malfunctioning ECM
  4. Poor connection between sensors and ECM
  5. Corrosion or damage to sensor connectors

Symptoms of P165C 2014 GMC Sierra

  1. Check engine light illuminated on the dashboard
  2. Reduced engine performance or power
  3. Poor fuel efficiency
  4. Rough idling or stalling
  5. Difficulty starting the vehicle

How to Fix P165C 2014 GMC Sierra

  1. Begin by using a diagnostic scanner to retrieve the trouble code and identify the specific sensor causing the issue.
  2. Inspect the wiring and connectors in the sensor reference voltage circuit for any damage or corrosion. Repair or replace as needed.
  3. Test the sensors in the system to ensure they are functioning correctly. Replace any faulty sensors.
  4. Clear the trouble code from the ECM's memory and perform a test drive to verify that the issue has been resolved.
  5. If the code persists, further diagnostics may be necessary to pinpoint the exact cause of the problem, such as testing the ECM for faults or conducting a more in-depth inspection of the sensor reference voltage system.

Cost to Fix P165C 2014 GMC Sierra

The typical repair costs for addressing a P165C code in a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for replacing a faulty sensor or repairing wiring issues can range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair time may vary depending on the complexity of the issue. Therefore, the total cost for addressing this code could range from $200 to $600 or more, including parts and labor. It is advisable to consult with a professional mechanic or auto repair shop for a more accurate estimate based on the specific diagnosis and repair needed for your vehicle.

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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 P165C 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P165C in a 2014 GMC Sierra?

- Common symptoms include check engine light illumination, reduced engine performance, and potential issues with the vehicle's sensors.

2. What does the OBDII code P165C "Sensor Reference Voltage Status Message Counter Incorrect" mean for a 2014 GMC Sierra?

- This code indicates that the message counter for the sensor reference voltage status is not matching the expected value, signaling a potential communication error between the sensor and the vehicle's computer.

3. What are the possible causes of OBDII code P165C in a 2014 GMC Sierra?

- Possible causes include faulty sensor connections, damaged wiring harness, issues with the sensor itself, or problems with the vehicle's computer system.

4. How can I diagnose the OBDII code P165C in my 2014 GMC Sierra?

- Diagnosing this code typically involves checking the sensor connections, inspecting the wiring harness for any damage, testing the sensor's functionality, and using a diagnostic scanner to retrieve specific error codes.

5. Can I continue driving my 2014 GMC Sierra with OBDII code P165C?

- It is not recommended to ignore this code and continue driving, as it can lead to further issues with the vehicle's performance and potentially cause damage to other components.

6. How can I repair OBDII code P165C in a 2014 GMC Sierra?

- Repair options may include fixing or replacing faulty sensor connections, repairing damaged wiring, replacing the sensor if necessary, and resetting the error code using a diagnostic tool.

7. Will resetting the error code make OBDII code P165C go away permanently in a 2014 GMC Sierra?

- Resetting the code may temporarily clear the error, but if the underlying issue causing the code is not addressed, it is likely to reappear once the problem persists.

8. Is it safe to attempt DIY repairs for OBDII code P165C in a 2014 GMC Sierra?

- DIY repairs are feasible for simple fixes like checking connections and inspecting wiring, but more complex issues may require professional diagnosis and repair to ensure proper resolution.

9. How long does it typically take to repair OBDII code P165C in a 2014 GMC Sierra?

- The repair time can vary depending on the specific cause of the code, ranging from a few minutes for simple fixes to several hours for more extensive repairs or part replacements.

10. Can extreme weather conditions affect the likelihood of OBDII code P165C occurring in a 2014 GMC Sierra?

- Extreme weather conditions, such as extreme heat or cold, can potentially exacerbate existing sensor or wiring issues, increasing the likelihood of triggering OBDII code P165C in the vehicle.

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