AutoCodes – Chevrolet – P2066 2015 Chevrolet Silverado

P2066 2015 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 2015 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.

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Code Popularity 273

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 2015 Chevrolet Silverado Description

Diesel Engine
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).

OBDII Code P2066 2015 Chevrolet Silverado - Fuel Level Sensor 2 Performance - AutoCodes.com — P2066 2015 Chevrolet Silverado Code - Fuel Level Sensor 2 Performance

What does this mean?

What are the Possible Causes of the DTC P2066 2015 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 2015 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.

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 2015 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.

Need more information about the P2066 2015 Chevrolet Silverado code?

Need more information on how to fix the P2066 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2015 Chevrolet Silverado Code

1. What does the OBDII code P2066 mean on a 2015 Chevrolet Silverado?

P2066 indicates a "Fuel Level Sensor 2 Performance" issue, meaning the second fuel level sensor is providing readings outside the expected range.

2. What are the common symptoms of code P2066 in a 2015 Chevrolet Silverado?

Typical symptoms include an inaccurate fuel gauge, a check engine light, poor fuel economy tracking, or trouble refueling due to improper fuel level readings.

3. What causes the P2066 code on a 2015 Chevrolet Silverado?

Common causes include a faulty fuel level sensor, wiring or connector issues, a malfunctioning fuel pump module, or debris in the fuel tank affecting sensor operation.

4. Can I drive my 2015 Chevrolet Silverado with a P2066 code?

While the truck may still be drivable, the inaccurate fuel readings could lead to unexpected running out of fuel or difficulty diagnosing other fuel system problems.

5. How do I fix the P2066 code on my 2015 Chevrolet Silverado?

Repairs may include replacing the faulty fuel level sensor, fixing damaged wiring or connectors, or inspecting and cleaning the fuel tank for debris.

6. How much does it cost to repair the P2066 code on a 2015 Chevrolet Silverado?

The cost typically ranges from $200 to $800, depending on whether the fuel level sensor or pump assembly needs replacement and labor rates in your area.

7. How do I diagnose the P2066 code on my 2015 Chevrolet Silverado?

Start by scanning for codes and clearing them to see if P2066 reappears. Then inspect the fuel level sensor, wiring, and connectors for damage or corrosion.

8. Can a bad fuel pump cause the P2066 code on a 2015 Chevrolet Silverado?

Yes, a malfunctioning fuel pump module or integrated fuel level sensor can trigger this code.

9. Does the P2066 code affect fuel economy on a 2015 Chevrolet Silverado?

While the code itself doesnâ€™t directly impact fuel economy, inaccurate fuel level readings can make it harder to track consumption effectively.

10. Will replacing the fuel pump fix the P2066 code on a 2015 Chevrolet Silverado?

It might, but only if the issue is related to the pump assembly or an integrated sensor failure. Proper diagnosis is essential before replacing parts.