AutoCodes – Buick – P2066 Buick

P2066 Buick Code - Fuel Level Sensor 2 Performance

Quick Answer

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 Buick 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.

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Code Popularity 393

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 29, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2066 Buick Description

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

OBDII Code P2066 Buick - Fuel Level Sensor 2 Performance - AutoCodes.com — P2066 Buick Code - Fuel Level Sensor 2 Performance

What does this mean?

What are the Possible Causes of the DTC P2066 Buick?

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 Buick?

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.

What does this mean?

Code Tech Notes

A low fuel level can trigger this code. Before replacing any parts, try filling up the fuel tank and erasing the engine code. If the problem persists, it may be necessary to replace the fuel level sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2066 Buick 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.

Need more information about the P2066 Buick code?

Need more information on how to fix the P2066 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2066 Buick code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2066 Buick Code

1. What are the common symptoms of OBDII code P2066 in a Buick related to the fuel level sensor 2 performance?

- Common symptoms include incorrect fuel level readings on the dashboard, fluctuating fuel gauge, and possible illumination of the "Check Engine" light.

2. What are the possible causes of OBDII code P2066 in a Buick indicating an issue with the fuel level sensor 2?

- Possible causes include a faulty fuel level sensor, damaged wiring or connectors in the fuel level sensor circuit, or a problem with the fuel tank itself.

3. How can I diagnose the OBDII code P2066 in my Buick related to the fuel level sensor 2 performance issue?

- Diagnosis typically involves using a scan tool to retrieve the trouble code, inspecting the fuel level sensor and its wiring for any visible damage, and testing the sensor's resistance and voltage output.

4. Can driving with OBDII code P2066 in a Buick cause any further damage to the vehicle?

- While driving with this code may not directly cause immediate harm, it is advisable to address the issue promptly to prevent inaccurate fuel level readings and potential inconvenience.

5. Is it safe to continue driving my Buick with OBDII code P2066 related to the fuel level sensor 2 performance issue?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the underlying problem as soon as possible to ensure accurate fuel level readings.

6. What are the repair options for resolving OBDII code P2066 in a Buick indicating a fuel level sensor 2 performance problem?

- Repair options may include replacing the faulty fuel level sensor, repairing damaged wiring or connectors, or addressing any issues with the fuel tank that may be causing the sensor malfunction.

7. Can a DIY enthusiast fix OBDII code P2066 in a Buick related to the fuel level sensor 2, or is professional assistance required?

- Depending on the level of automotive repair knowledge and experience, some DIY enthusiasts may be able to address the issue by replacing the sensor or repairing the wiring. However, professional assistance is recommended for complex diagnostics.

8. How much does it typically cost to repair OBDII code P2066 in a Buick due to a fuel level sensor 2 performance issue?

- The cost of repair can vary based on the specific cause of the problem, but it may range from $200 to $500, including parts and labor.

9. Are there any preventive measures to avoid encountering OBDII code P2066 in a Buick related to the fuel level sensor 2 performance issue in the future?

- Regular vehicle maintenance, such as keeping the fuel tank clean and ensuring proper wiring connections, can help prevent issues with the fuel level sensor and the associated trouble code.

10. How long does it typically take to repair OBDII code P2066 in a Buick caused by a fuel level sensor 2 performance problem?

- The repair time can vary based on the exact cause of the issue and the complexity of the repair, but it may take anywhere from 1 to 3 hours for a professional technician to diagnose and fix the problem.