AutoCodes – GMC – P165C GMC

P165C GMC Code - Sensor Reference Voltage Status Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Sensor Reference Voltage. 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 GMC indicates Sensor Reference Voltage Status Message Counter Incorrect.
Common causes: Common causes include Faulty Sensor Reference Voltage.
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 836

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 Sep 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P165C GMC Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Sensor Reference Voltage Status Message Counter is Incorrect.

OBDII Code P165C GMC - Sensor Reference Voltage Status Message Counter Incorrect - AutoCodes.com — P165C GMC Code - Sensor Reference Voltage Status Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P165C GMC?

Faulty Sensor Reference Voltage

How to Fix the DTC P165C GMC?

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 P165C GMC 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 P165C GMC code?

Need more information on how to fix the P165C GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P165C 2014 GMC Sierra — Sensor Reference Voltage Status Message Counter Incorrect
P165C 2015 GMC Sierra — Sensor Reference Voltage Status Message Counter Incorrect
P165C 2016 GMC Sierra — Sensor Reference Voltage Status Message Counter Incorrect
P165C 2017 GMC Sierra — Sensor Reference Voltage Status Message Counter Incorrect
P165C 2018 GMC Sierra — Sensor Reference Voltage Status Message Counter Incorrect

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 GMC Code

1. What are the common symptoms of OBDII code P165C GMC?

- Common symptoms include rough idling, reduced engine performance, illuminated Check Engine Light, and potential stalling of the vehicle.

2. What does the OBDII code P165C GMC indicate?

- This code indicates that the sensor reference voltage status message counter is incorrect, meaning there is a problem with the sensor voltage reference circuit.

3. What are the possible causes of OBDII code P165C GMC?

- Possible causes include a faulty sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning PCM (Powertrain Control Module), or a short circuit in the sensor reference voltage circuit.

4. How can I diagnose the issue related to OBDII code P165C GMC?

- Diagnosing the issue involves checking the sensor's voltage output, inspecting the wiring and connectors for damage, and using a diagnostic scan tool to gather data from the PCM.

5. Is it safe to continue driving with OBDII code P165C GMC present?

- It is not recommended to drive with this code present, as it can lead to potential engine performance issues and further damage if left unresolved.

6. Can I repair OBDII code P165C GMC on my own?

- Depending on your experience and access to tools, you may be able to repair the issue on your own by identifying and addressing the root cause, such as replacing a faulty sensor or repairing damaged wiring.

7. Will resetting the Check Engine Light clear OBDII code P165C GMC?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle again.

8. How much does it typically cost to repair OBDII code P165C GMC at a mechanic?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve a diagnostic fee, parts replacement costs, and labor charges, which can range from around $100 to $500 or more.

9. Can a low battery voltage trigger OBDII code P165C GMC?

- Yes, a low battery voltage can potentially trigger this code, as it can affect the overall operation of the sensor reference voltage circuit and cause irregular voltage readings.

10. Is OBDII code P165C GMC specific to GMC vehicles only?

- While the specific code P165C may be associated with GMC vehicles, similar issues related to the sensor reference voltage status message counter can occur in other vehicle makes and models as well.