AutoCodes – Generic – P1809

P1809 Code - Transmission 4-Wheel Drive Low Indicator Open Circuit

Quick Answer

P1809 indicates Transmission 4-Wheel Drive Low Indicator Open Circuit. Common causes include Faulty Transmission 4-Wheel Drive Low Indicator, Transmission 4-Wheel Drive Low Indicator harness is open or shorted, Transmission 4-Wheel Drive Low 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: P1809 indicates Transmission 4-Wheel Drive Low Indicator Open Circuit.
Common causes: Common causes include Faulty Transmission 4-Wheel Drive Low Indicator, Transmission 4-Wheel Drive Low Indicator harness is open or shorted, Transmission 4-Wheel Drive Low 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 8,336

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 Sep 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1809 Description

OBDII Code P1809 - Transmission 4-Wheel Drive Low Indicator Open Circuit - AutoCodes.com — P1809 Code - Transmission 4-Wheel Drive Low Indicator Open Circuit

What does this mean?

What are the Possible Causes of the DTC P1809?

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

How to Fix the DTC P1809?

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 P1809 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 P1809 code?

Need more information on how to fix the P1809 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1809 Ford — Transmission 4-Wheel Drive Low Indicator Open Circuit
P1809 Lincoln — Transmission 4-Wheel Drive Low Indicator Open Circuit
P1809 Mercury — Transmission 4-Wheel Drive Low Indicator Open Circuit

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.