P2066 2015 GMC Sierra Code - Fuel Level Sensor 2 Performance
Quick Answer
Diesel Engine The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. Common causes include Faulty Fuel Level Sensor, Fuel Level Sensor harness is open or shorted, Fuel Level Sensor circuit poor electrical connection. 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
- P2066 2015 GMC Sierra indicates Fuel Level Sensor 2 Performance.
- Common causes
- Common causes include Faulty Fuel Level Sensor, Fuel Level Sensor harness is open or shorted, Fuel Level Sensor circuit poor electrical connection.
- 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 P2066 2015 GMC Sierra Description
The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The Fuel Pump Driver Control Module monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor and sends the signal information to the Engine Control Module (ECM) for all further handling. The ECM uses this value in order to determine the fuel level. When the fuel tank is full, the resistances of both fuel level sensors are low, and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high, and the ECM senses a high signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via the serial data circuit to the instrument cluster in order to control the fuel gauge.
Gasoline Engine
The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The Engine Control Module (ECM) monitors the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to determine the fuel level. When the fuel tank is full, the resistances of both fuel level sensors are low, and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high, and the ECM senses a high signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via the serial data circuit to the instrument cluster in order to control the fuel gauge.
The Diagnostic Trouble Code (DTC) will be set if the ECM detects a change in fuel level of less than a specified amount (typically 3 - 10 L or 0.8 - 2.6 gal) over a specified driving distance (typically 240 - 320 km or 150 - 200 miles).
What are the Possible Causes of the DTC P2066 2015 GMC Sierra?
- Faulty Fuel Level Sensor
- Fuel Level Sensor harness is open or shorted
- Fuel Level Sensor circuit poor electrical connection
- Faulty Instrument Cluster
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2066 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2066 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 P2066 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code P2066 in a 2015 GMC Sierra related to Fuel Level Sensor 2 Performance?
The common symptoms include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge readings, and the fuel gauge constantly showing empty or full when it's not.
2. What are the possible causes of OBDII code P2066 in a 2015 GMC Sierra?
Possible causes of this code can include a faulty fuel level sensor, wiring issues in the fuel level sensor circuit, a defective instrument cluster, or a problem with the vehicle's ECM (engine control module).
3. How can I diagnose the issue causing OBDII code P2066 in my 2015 GMC Sierra?
To diagnose the issue, you can start by checking the wiring and connections related to the fuel level sensor. You may also use a multimeter to test the sensor's resistance and voltage readings. If needed, consult a professional mechanic for further diagnosis.
4. Can a DIY enthusiast repair OBDII code P2066 in a 2015 GMC Sierra related to Fuel Level Sensor 2 Performance?
While some DIY enthusiasts may be able to replace a faulty fuel level sensor themselves, it is recommended to have a professional mechanic diagnose and repair the issue to ensure proper installation and calibration.
5. Is it safe to continue driving my 2015 GMC Sierra with OBDII code P2066, Fuel Level Sensor 2 Performance?
It is generally not recommended to drive the vehicle with this code present, as inaccurate fuel level readings can lead to running out of fuel unexpectedly. It's best to address the issue promptly to avoid potential problems.
6. How much does it typically cost to repair OBDII code P2066 in a 2015 GMC Sierra related to Fuel Level Sensor 2 Performance?
The cost of repairing this code can vary depending on the underlying cause of the issue, the labor rates in your area, and whether genuine OEM parts are used. It's best to consult a mechanic for an accurate estimate.
7. Will resetting the OBDII code P2066 in my 2015 GMC Sierra make the issue go away?
Resetting the code may temporarily clear the Check Engine Light, but it will not fix the underlying issue causing the code. It's important to diagnose and repair the problem to prevent it from recurring.
8. Can extreme weather conditions affect the performance of the fuel level sensor in a 2015 GMC Sierra, triggering code P2066?
Yes, extreme temperatures or weather conditions can potentially impact the performance of the fuel level sensor, leading to inaccurate readings and triggering code P2066. Insulating or protecting the sensor may help in such situations.
9. Are there any preventive measures I can take to avoid OBDII code P2066 in my 2015 GMC Sierra related to Fuel Level Sensor 2 Performance?
Regularly inspecting the fuel level sensor, keeping the fuel system well-maintained, and addressing any issues promptly can help prevent the occurrence of code P2066 in your vehicle.
10. How long does it typically take for a mechanic to repair OBDII code P2066 in a 2015 GMC Sierra related to Fuel Level Sensor 2 Performance?
The repair time can vary depending on the exact cause of the issue and the mechanic's expertise. Replacing a faulty fuel level sensor can typically take a few hours, but complex wiring or ECM issues may require more time for diagnosis and repair.
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