P165C 2015 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 2015 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 2015 GMC Sierra Description
What are the Possible Causes of the DTC P165C 2015 GMC Sierra?
- Faulty Sensor Reference Voltage
How to Fix the DTC P165C 2015 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 2015 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.
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Frequently Asked Questions about P165C 2015 GMC Sierra Code
1. What does the OBDII code P165C mean on a 2015 GMC Sierra?
P165C indicates that the ECM has detected an issue with the sensor reference voltage status message counter, specifically that the counter value is incorrect.
2. What are the common symptoms of code P165C in a 2015 GMC Sierra?
Symptoms may include a check engine light, reduced engine performance, failure of certain sensors to provide accurate data, and possible erratic engine behavior.
3. What causes the P165C code to appear on a 2015 GMC Sierra?
Common causes include a faulty engine control module (ECM), damaged or corroded wiring in the sensor reference voltage circuit, or malfunctioning sensors connected to the reference voltage circuit.
4. Can a faulty sensor trigger code P165C on a 2015 GMC Sierra?
Yes, a malfunctioning sensor connected to the reference voltage circuit can disrupt the signal and trigger the P165C code.
5. How can I diagnose the cause of the P165C code in my 2015 GMC Sierra?
Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check the reference voltage and continuity in the circuit. If no issues are found, test the sensors and the ECM.
6. Is it safe to drive a 2015 GMC Sierra with the P165C code?
Driving with this code may be unsafe, as it can lead to erratic engine performance or reduced power. It’s best to address the issue promptly.
7. How do I fix the P165C code on a 2015 GMC Sierra?
Repairs may include replacing damaged wiring, repairing corroded connectors, replacing a faulty sensor, or reprogramming or replacing the ECM if necessary.
8. Can a software update fix the P165C code in a 2015 GMC Sierra?
In some cases, an ECM software update from the manufacturer may resolve the issue if it is caused by a programming glitch.
9. How much does it cost to repair the P165C code on a 2015 GMC Sierra?
Repair costs can vary widely. Minor wiring repairs may cost under $100, while replacing an ECM could cost $500–$1,200, including labor.
10. What tools are needed to troubleshoot the P165C code on a 2015 GMC Sierra?
You’ll need an OBDII scanner, a multimeter for voltage checks, and possibly a wiring diagram for the reference voltage circuit to diagnose the issue.
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