AutoCodes – Mercury – P2066 Mercury

P2066 Mercury Code - Fuel Level Sensor 'B' Performance

Quick Answer

The Powertrain Control Module (PCM) monitors the Fuel Level Sensor 'B' Circuit. Common causes include Communication link concern, Faulty Instrument Panel Cluster (IPC), Faulty Instrument Cluster (IC). 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 Mercury indicates Fuel Level Sensor 'B' Performance.
Common causes: Common causes include Communication link concern, Faulty Instrument Panel Cluster (IPC), Faulty Instrument Cluster (IC).
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 1,342

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 Nov 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2066 Mercury Description

The Powertrain Control Module (PCM) monitors the Fuel Level Sensor 'B' Circuit. The PCM sets the OBDII code when the Fuel Level Sensor 'B' Circuit is not to factory specifications.

OBDII Code P2066 Mercury - Fuel Level Sensor 'B' Performance - AutoCodes.com — P2066 Mercury Code - Fuel Level Sensor 'B' Performance

What does this mean?

What are the Possible Causes of the DTC P2066 Mercury?

Communication link concern
Faulty Instrument Panel Cluster (IPC)
Faulty Instrument Cluster (IC)
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2066 Mercury?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2066 Mercury 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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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.