AutoCodes – Honda – P1709 Honda

P1709 Honda Code - Problem Transmission Gear Selection Switch Circuit

Quick Answer

Gearshift lever position signal is delivered to Powertrain Control Module (PCM) by the Transmission Range Switch, located on side of the transaxle. Common causes include Faulty Transmission Range Switch (Gear Position Switch), Transmission Range Switch harness is open or shorted, Transmission Range Switch 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: P1709 Honda indicates Problem Transmission Gear Selection Switch Circuit.
Common causes: Common causes include Faulty Transmission Range Switch (Gear Position Switch), Transmission Range Switch harness is open or shorted, Transmission Range Switch 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 13,216

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 Jul 13, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
Comments
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Code P1709 Honda Description

Gearshift lever position signal is delivered to Powertrain Control Module (PCM) by the Transmission Range Switch, located on side of the transaxle. The PCM monitors the Transmission Range Switch. The Diagnostic Trouble Code (DTC) will set when the Transmission Range Switch is not to factory specifications.

OBDII Code P1709 Honda - Problem Transmission Gear Selection Switch Circuit - AutoCodes.com — P1709 Honda Code - Problem Transmission Gear Selection Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P1709 Honda?

Faulty Transmission Range Switch (Gear Position Switch)
Transmission Range Switch harness is open or shorted
Transmission Range Switch circuit poor electrical connection

How to Fix the DTC P1709 Honda?

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

P1706, P1705, P1709-Replace Acura / Honda V6 Transmission Range Switch - Neutral Safety Switch

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1709 Honda 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.