P2066 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code
1. What are the common symptoms of OBDII code P2066 (Fuel Level Sensor 2 Performance) in a 2014 GMC Sierra?
- Common symptoms include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge readings, and the fuel gauge getting stuck at a certain level.
2. What are the possible causes of OBDII code P2066 in a 2014 GMC Sierra?
- The code P2066 can be triggered by a faulty fuel level sensor, a damaged wiring harness, poor electrical connections, or a problem with the fuel tank sending unit.
3. How can I diagnose the cause of OBDII code P2066 in my 2014 GMC Sierra?
- Diagnosing the issue may involve checking the fuel level sensor's wiring and connections, testing the sensor's resistance, inspecting the fuel tank sending unit, and using a diagnostic scanner to monitor sensor data.
4. Can I still drive my 2014 GMC Sierra with OBDII code P2066 (Fuel Level Sensor 2 Performance)?
- While it may be possible to drive the vehicle with this code, it is not recommended as inaccurate fuel level readings can lead to running out of fuel unexpectedly. It's best to address the issue promptly.
5. How can I repair OBDII code P2066 in my 2014 GMC Sierra?
- Repair options may include replacing the faulty fuel level sensor, repairing or replacing the wiring harness, ensuring proper electrical connections, or replacing the fuel tank sending unit if necessary.
6. Is it possible to reset OBDII code P2066 in a 2014 GMC Sierra without fixing the underlying issue?
- While clearing the fault code may temporarily turn off the Check Engine Light, the underlying problem causing the code will persist. It is essential to diagnose and repair the issue to prevent it from recurring.
7. Are there any DIY repair tips for addressing OBDII code P2066 in a 2014 GMC Sierra?
- DIY enthusiasts with automotive repair experience may attempt to replace the fuel level sensor themselves after confirming the diagnosis and ensuring they have the necessary tools and knowledge.
8. How much does it typically cost to repair OBDII code P2066 in a 2014 GMC Sierra at a professional auto repair shop?
- The cost of repairing OBDII code P2066 can vary depending on the specific cause of the issue, but it may range from $200 to $500, including parts and labor.
9. Will OBDII code P2066 (Fuel Level Sensor 2 Performance) affect my 2014 GMC Sierra's fuel efficiency?
- While the code itself may not directly impact fuel efficiency, driving with inaccurate fuel level readings can potentially lead to running out of fuel or other issues that may affect overall fuel efficiency.
10. How soon should I address OBDII code P2066 in my 2014 GMC Sierra after it appears?
- It is recommended to address OBDII code P2066 as soon as possible to avoid potential fuel-related issues and to ensure the accurate monitoring of fuel levels in your vehicle.
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