P2066 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code P2066 on a 2017 GMC Sierra related to Fuel Level Sensor 2 Performance?
The common symptoms include inaccurate fuel gauge readings, fluctuating fuel levels, and the check engine light turning on.
2. What are the possible causes of OBDII code P2066 on a 2017 GMC Sierra?
Possible causes include a faulty fuel level sensor, wiring issues in the fuel level sensor circuit, poor electrical connections, or a problem with the vehicle's powertrain control module (PCM).
3. How can I diagnose the OBDII code P2066 on a 2017 GMC Sierra?
Diagnosing this code involves using an OBDII scanner to retrieve the specific fault code, checking the wiring and connections related to the fuel level sensor, and testing the sensor's functionality.
4. Can I continue driving my 2017 GMC Sierra with OBDII code P2066 triggered?
It is not recommended to drive with this code triggered, as inaccurate fuel level readings can lead to running out of fuel unexpectedly. It is best to address the issue promptly.
5. How can I repair OBDII code P2066 on a 2017 GMC Sierra related to Fuel Level Sensor 2 Performance?
Repair options may include replacing the faulty fuel level sensor, repairing or replacing damaged wiring, ensuring proper electrical connections, or reprogramming the vehicle's PCM.
6. Will resetting the OBDII code P2066 on a 2017 GMC Sierra solve the issue permanently?
Simply resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the code. Proper diagnosis and repair are necessary for a permanent solution.
7. Is it possible to clear the OBDII code P2066 on a 2017 GMC Sierra without addressing the Fuel Level Sensor 2 Performance issue?
Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely reoccur. It's crucial to fix the problem to prevent further issues.
8. Can a DIY enthusiast repair OBDII code P2066 on a 2017 GMC Sierra themselves?
Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code themselves by following repair guides and using proper diagnostic equipment.
9. How long does it typically take to repair OBDII code P2066 on a 2017 GMC Sierra at a professional auto repair shop?
The repair time can vary based on the exact cause of the code, but it may take anywhere from an hour to several hours to diagnose and fix the issue at an auto repair shop.
10. Are there any recalls or technical service bulletins related to OBDII code P2066 on a 2017 GMC Sierra?
It's recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or technical service bulletins related to this specific OBDII code on your vehicle.
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