P2066 2014 Chevrolet Silverado 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 Chevrolet Silverado 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 Chevrolet Silverado 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 Chevrolet Silverado?
- 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 Chevrolet Silverado?
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 Chevrolet Silverado 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 Chevrolet Silverado Code
1. What does the OBDII code P2066 mean on a 2014 Chevrolet Silverado?
P2066 indicates a performance issue with Fuel Level Sensor 2, which monitors the fuel level in one of the tanks or sections of the fuel system.
2. What are the common symptoms of code P2066 in a 2014 Chevrolet Silverado?
Symptoms include inaccurate fuel gauge readings, erratic fuel gauge movement, longer crank times, and potentially the illumination of the check engine light.
3. What causes the P2066 code to appear on a 2014 Chevrolet Silverado?
Common causes include a faulty fuel level sensor, wiring issues like corrosion or damage, poor electrical connections, or a malfunction in the fuel pump module.
4. Can a bad fuel level sensor cause drivability issues in a 2014 Chevrolet Silverado?
Typically, a faulty fuel level sensor does not directly cause drivability issues but can lead to miscalculations in fuel range, potentially causing the truck to run out of fuel unexpectedly.
5. How do you diagnose the P2066 code on a 2014 Chevrolet Silverado?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting wiring and connections to the fuel level sensor, and testing the sensor for proper resistance values.
6. Can I drive my 2014 Chevrolet Silverado with a P2066 code?
While the vehicle may still be drivable, it’s not recommended as inaccurate fuel readings could lead to running out of fuel or other complications.
7. How can I fix the P2066 code on my 2014 Chevrolet Silverado?
Repairs may include replacing the faulty fuel level sensor, repairing or replacing damaged wiring, cleaning corroded connections, or replacing the fuel pump module if necessary.
8. How much does it cost to repair a P2066 code on a 2014 Chevrolet Silverado?
Repair costs can vary but typically range from $200 to $800, depending on whether the fuel level sensor alone or the entire fuel pump module needs replacement.
9. Is the P2066 code related to a specific fuel tank in the 2014 Chevrolet Silverado?
Yes, in vehicles with dual tanks or a saddle tank system, the code pertains to the second fuel level sensor, which monitors one side of the system.
10. Can a software update fix the P2066 code on a 2014 Chevrolet Silverado?
While rare, a software update to the vehicle’s engine control module (ECM) could resolve calibration issues, but this is typically only done after confirming no hardware faults.
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