P165C 2018 GMC Sierra 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 2018 GMC Sierra 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.
Code P165C 2018 GMC Sierra Description
What are the Possible Causes of the DTC P165C 2018 GMC Sierra?
- Faulty Sensor Reference Voltage
How to Fix the DTC P165C 2018 GMC Sierra?
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 2018 GMC Sierra 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 2018 GMC Sierra code?
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Frequently Asked Questions about P165C 2018 GMC Sierra Code
1. What does OBDII code P165C mean on a 2018 GMC Sierra?
P165C indicates that the sensor reference voltage status message counter is incorrect, suggesting an issue with the communication or functionality of the sensor's reference voltage circuit.
2. What are the symptoms of code P165C on a GMC Sierra?
Common symptoms include an illuminated check engine light, possible erratic engine performance, communication issues between sensors and the ECM, or no noticeable symptoms at all.
3. What causes the P165C code to appear?
The code can be caused by a faulty sensor, damaged wiring or connectors in the reference voltage circuit, a malfunctioning ECM, or an intermittent electrical issue.
4. How is P165C diagnosed on a 2018 GMC Sierra?
A technician will use a scan tool to confirm the code, inspect the wiring and connectors in the affected circuit, check the reference voltage, and test the ECM if necessary.
5. Can I drive my GMC Sierra with the P165C code?
While it may be possible to drive with this code, it is not recommended as it could lead to further issues with sensor communication affecting engine performance.
6. What tools are needed to troubleshoot P165C?
Basic tools include an OBDII scan tool, a multimeter for checking voltage, and potentially a wiring diagram for the sensor reference circuit.
7. How can I fix code P165C on my GMC Sierra?
Repairs may involve replacing a faulty sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if it is determined to be faulty.
8. How much does it cost to repair code P165C on a GMC Sierra?
Repair costs vary depending on the underlying issue but can range from $50 for simple wiring repairs to $1,000 or more for ECM replacement.
9. Can a loose connector cause the P165C code?
Yes, a loose or corroded connector in the sensor reference voltage circuit can disrupt communication and trigger the code.
10. Does clearing the P165C code fix the issue?
Clearing the code may temporarily remove the check engine light, but the underlying issue must be resolved to prevent the code from returning.
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