AutoCodes – Generic – P1725

P1725 Code - NT Revolution Sensor Circuit Malfunction

Quick Answer

This sensor detects the rotation speed of the input turbine. Common causes include Faulty Input Turbine (NT) Speed Sensor, Input Turbine (NT) Speed Sensor harness is open or shorted, Input Turbine (NT) Speed Sensor 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: P1725 indicates NT Revolution Sensor Circuit Malfunction.
Common causes: Common causes include Faulty Input Turbine (NT) Speed Sensor, Input Turbine (NT) Speed Sensor harness is open or shorted, Input Turbine (NT) Speed Sensor 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 33,508

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 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1725 Description

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) and the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure in response to various conditions, thus performing smooth gear shifting.

OBDII Code P1725 - NT Revolution Sensor Circuit Malfunction - AutoCodes.com — P1725 Code - NT Revolution Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1725?

Faulty Input Turbine (NT) Speed Sensor
Input Turbine (NT) Speed Sensor harness is open or shorted
Input Turbine (NT) Speed Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1725?

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 P1725 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 P1725 code?

Need more information on how to fix the P1725 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1725 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1725 Ford — Insufficient Engine Speed Increase During Self-Test
P1725 Hyundai — TOD Control Module Error
P1725 Lexus — NT Revolution Sensor Circuit Malfunction
P1725 Lincoln — Insufficient Engine Speed Increase During Self-Test
P1725 Mercury — Insufficient Engine Speed Increase During Self-Test
P1725 Toyota — NT Revolution Sensor Circuit Malfunction

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.

Frequently Asked Questions about P1725 Code

1. What are the common symptoms of OBDII code P1725 (NT Revolution Sensor Circuit Malfunction)?

The common symptoms include erratic shifting behavior, transmission slippage, and illuminated Check Engine Light.

2. What can cause the OBDII code P1725 to appear?

The code P1725 typically appears due to a faulty NT revolution sensor, wiring issues in the sensor circuit, or a malfunction in the transmission control module.

3. How serious is the NT Revolution Sensor Circuit Malfunction?

Ignoring the OBDII code P1725 can lead to further damage to the transmission system, potentially resulting in costly repairs if not addressed promptly.

4. How can I diagnose the NT Revolution Sensor Circuit Malfunction?

Diagnosing the issue involves using a scan tool to retrieve the trouble codes, inspecting the NT revolution sensor and its wiring for any damage, and checking the transmission control module for faults.

5. Can I drive my vehicle with the OBDII code P1725 present?

It is not recommended to drive the vehicle with the code P1725 present, as it can lead to transmission issues and potentially unsafe driving conditions.

6. What are some tips for repairing the NT Revolution Sensor Circuit Malfunction?

Repairing the issue may involve replacing the faulty NT revolution sensor, repairing any damaged wiring in the sensor circuit, or reprogramming the transmission control module.

7. How much does it typically cost to fix the NT Revolution Sensor Circuit Malfunction?

The cost of fixing the NT Revolution Sensor Circuit Malfunction can vary depending on the extent of the damage and the specific repairs needed, but it can range from a few hundred to over a thousand dollars.

8. Can a DIY enthusiast fix the OBDII code P1725 at home?

While some experienced DIY enthusiasts may be able to diagnose and repair the issue themselves, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair of the NT Revolution Sensor Circuit Malfunction.

9. Will resetting the Check Engine Light make the OBDII code P1725 disappear?

Resetting the Check Engine Light may temporarily turn it off, but if the underlying issue causing the code P1725 is not addressed, the light is likely to come back on once the problem is detected again.

10. Is the NT Revolution Sensor Circuit Malfunction a common issue in certain vehicle makes and models?

The NT Revolution Sensor Circuit Malfunction can occur in various vehicle makes and models, especially in those equipped with automatic transmissions and electronic control systems.