AutoCodes – Mercury – P1806 Mercury

P1806 Mercury Code - Transmission 4-Wheel Drive High Indicator Short Circuit To Battery

Quick Answer

P1806 Mercury indicates Transmission 4-Wheel Drive High Indicator Short Circuit To Battery. Common causes include Faulty Transmission 4-Wheel Drive High Indicator, Transmission 4-Wheel Drive High Indicator harness is open or shorted, Transmission 4-Wheel Drive High Indicator 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: P1806 Mercury indicates Transmission 4-Wheel Drive High Indicator Short Circuit To Battery.
Common causes: Common causes include Faulty Transmission 4-Wheel Drive High Indicator, Transmission 4-Wheel Drive High Indicator harness is open or shorted, Transmission 4-Wheel Drive High Indicator 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 1,503

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P1806 Mercury Description

OBDII Code P1806 Mercury - Transmission 4-Wheel Drive High Indicator Short Circuit To Battery - AutoCodes.com — P1806 Mercury Code - Transmission 4-Wheel Drive High Indicator Short Circuit To Battery

What does this mean?

What are the Possible Causes of the DTC P1806 Mercury?

Faulty Transmission 4-Wheel Drive High Indicator
Transmission 4-Wheel Drive High Indicator harness is open or shorted
Transmission 4-Wheel Drive High Indicator circuit poor electrical connection

How to Fix the DTC P1806 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 P1806 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.