P2066 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P2066 on a 2016 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 staying at empty even when the tank is full.
2. What are the possible causes of OBDII code P2066 on a 2016 GMC Sierra?
Potential causes of this code include a faulty fuel level sensor, damaged wiring or connectors in the fuel level sensor circuit, or a problem with the vehicle's powertrain control module (PCM).
3. How can I diagnose the issue causing OBDII code P2066 on my 2016 GMC Sierra?
To diagnose the issue, you can use an OBDII scanner to read the code and check the live data for the fuel level sensor. Additionally, inspect the wiring and connectors for any signs of damage or corrosion.
4. Is it safe to continue driving my 2016 GMC Sierra with OBDII code P2066 related to Fuel Level Sensor 2 Performance?
It is generally not recommended to drive the vehicle with this code, as inaccurate fuel level readings can lead to running out of gas unexpectedly. It is best to address the issue promptly.
5. Can I reset the OBDII code P2066 on my 2016 GMC Sierra by disconnecting the battery?
While disconnecting the battery may clear the code temporarily, it is not a permanent solution. The underlying issue causing the code needs to be diagnosed and repaired to prevent it from recurring.
6. How much does it typically cost to repair OBDII code P2066 on a 2016 GMC Sierra?
The cost of repairing this code can vary depending on the exact cause of the issue. It may involve replacing the fuel level sensor, repairing wiring, or addressing PCM issues. Costs can range from a few hundred to over a thousand dollars.
7. Are there any DIY tips for fixing OBDII code P2066 on a 2016 GMC Sierra?
If you have experience with automotive repairs, you may be able to replace the fuel level sensor yourself. However, diagnosing and repairing wiring or PCM issues may require professional assistance.
8. Can a faulty fuel level sensor cause other issues besides triggering OBDII code P2066 on a 2016 GMC Sierra?
Yes, a faulty fuel level sensor can cause other issues such as incorrect fuel level readings, inaccurate range estimations, and potential stalling if the vehicle runs out of gas unexpectedly.
9. How long does it typically take to repair OBDII code P2066 on a 2016 GMC Sierra?
The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.
10. Will OBDII code P2066 on a 2016 GMC Sierra cause the check engine light to illuminate?
Yes, OBDII code P2066 related to Fuel Level Sensor 2 Performance will trigger the check engine light to illuminate on the dashboard of your 2016 GMC Sierra.
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