P165C GMC Code - Sensor Reference Voltage Status Message Counter Incorrect
Quick Answer
The P165C diagnostic trouble code for GMC vehicles indicates that the Sensor Reference Voltage Status Message Counter is incorrect. Common causes include Faulty Sensor: A defective sensor within the sensor reference voltage system can trigger the P165C trouble code, Wiring Issues: Damaged or corroded wiring connecting the sensors to the ECM or PCM can disrupt the sensor reference voltage system, ECM/PCM Malfunction: A malfunctioning ECM or PCM may not be able to interpret sensor data correctly, leading to the code. 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: A defective sensor within the sensor reference voltage system can trigger the P165C trouble code, Wiring Issues: Damaged or corroded wiring connecting the sensors to the ECM or PCM can disrupt the sensor reference voltage system, ECM/PCM Malfunction: A malfunctioning ECM or PCM may not be able to interpret sensor data correctly, leading to the code.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P165C GMC Description
The P165C diagnostic trouble code for GMC vehicles indicates that the Sensor Reference Voltage Status Message Counter is incorrect. This code is typically associated with issues related to the sensor reference voltage system, which plays a crucial role in providing accurate data to various vehicle systems. The sensor reference voltage is a fixed voltage supplied to sensors to ensure they operate correctly and provide accurate readings to the Engine Control Module (ECM) or Powertrain Control Module (PCM).
Common Causes of P165C GMC
- Faulty Sensor: A defective sensor within the sensor reference voltage system can trigger the P165C trouble code.
- Wiring Issues: Damaged or corroded wiring connecting the sensors to the ECM or PCM can disrupt the sensor reference voltage system.
- ECM/PCM Malfunction: A malfunctioning ECM or PCM may not be able to interpret sensor data correctly, leading to the code.
- Voltage Regulator Failure: If the voltage regulator that supplies the sensor reference voltage is faulty, it can cause issues with the system.
- Poor Electrical Connections: Loose or poor electrical connections can result in inconsistent sensor readings and trigger the code.
Symptoms of P165C GMC
- Check Engine Light: The most common symptom associated with the P165C code is the illumination of the Check Engine Light on the dashboard.
- Reduced Engine Performance: The vehicle may experience reduced engine performance, including hesitation, rough idle, or lack of power.
- Poor Fuel Efficiency: A faulty sensor reference voltage system can lead to decreased fuel efficiency, resulting in increased fuel consumption.
- Stalling: In severe cases, the vehicle may stall or have difficulty starting due to inaccurate sensor readings.
How to Fix P165C GMC
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the sensor reference voltage system.
- Check Sensor Operation: Test each sensor within the system to identify any faulty sensors that may need replacement.
- Inspect Wiring: Check the wiring harness for any damage, corrosion, or loose connections, and repair or replace as needed.
- Test Voltage Regulator: Verify the voltage regulator's functionality to ensure it is supplying the correct voltage to the sensors.
- Clear Codes and Test Drive: Clear the trouble code from the ECM/PCM memory, and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P165C GMC
The typical repair costs for addressing the P165C code can vary depending on the specific cause of the issue. In general, replacing a faulty sensor or repairing wiring issues may cost between $100 and $300, including parts and labor. If the ECM/PCM needs to be replaced or reprogrammed, the costs can range from $500 to $1000 or more. Additional costs for diagnostic time, taxes, and fees may apply. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on your vehicle's make and model, as well as local labor rates.
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?
Get the P165C GMC code diagnosed by a professional: Find a repair shop in your area
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
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.
Discuss the causes and fixes for P165C GMC OBDII Code
Code P165C GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.