AutoCodes – Honda – P1647 Honda

P1647 Honda Code - Engine Speed Signal Circuit Problem

Quick Answer

P1647 - Power Command Signal Circuit Low Input P1647 - Power Command Signal Circuit High Input P1647 - Engine Torque Signal Circuit Low Input P1647 - Engine Torque Signal Circuit High Input P1647 - Mode Signal Circuit 1 Low Input P1647 - Mode Signal Circuit 1 High Input P1647 - Mode Signal Circuit 2 Problem Common causes for P1647 Honda include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues. 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: P1647 Honda indicates Engine Speed Signal Circuit Problem.
Common causes: Common causes for P1647 Honda include wiring or connector problems, a faulty related sensor or actuator, and control module or calibration issues.
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 11,140

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 05, 2019

Description
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P1647 Honda Description

OBDII Code P1647 Honda - Engine Speed Signal Circuit Problem - AutoCodes.com — P1647 Honda Code - Engine Speed Signal Circuit Problem

How to Fix the DTC P1647 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

There are seven (7) codes listed on the service manual for the P1647 code. Try reseting the code first, and if the code comes back, check fuses and the Engine Control Module (ECM) connector.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1647 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.

Need more information about the P1647 Honda code?

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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.