An on-board diagnostic or OBD-II code helps you or your mechanic identify potential issues in your vehicle. Each logged code refers to a specific problem, so you must know what it means to resolve it.
If your vehicle has set a P0725 code and you have no idea what it means, this article is for you. Learn all about the possible triggers and issues that could persist if this trouble code is ignored.
What Does the P0725 Code Mean?
Diagnostic trouble code (DTC) P0725 stands for “Engine Speed Input Circuit.” This code is logged when the transmission control module (TCM) does not receive a valid engine speed signal from the engine control module (ECM).
This trouble code can also be set if the TCM fails to detect any engine speed signals from the ECM. Code P0725 may be triggered by an electrical or mechanical issue.
The ECM relies on the crankshaft position sensor (and in some cases, one or more camshaft position sensors) to determine engine speed. On modern vehicles, the ECM shares information with the TCM over a data network. The latter uses that data to determine the proper shift strategy and other aspects of transmission operation.
The function of the automatic transmission is to match the engine’s power and torque to the driver’s preferred speed and acceleration. It does this by auto-selecting different gear ratios or speeds to power the wheels. The code P0725 is set if a reliable speed signal from the ECM is not relayed.
Other DTCs may also be stored alongside it, such as P0726, P0727, and P0728.
Several Nissan vehicles are prone to P0725 including the Nissan Altima, Sentra, Murano, and Rogue. Aside from Nissan, users have also reported P0725 in Mitsubishi, Volkswagen, Infiniti, and Honda vehicles.
Note: The definition of code P0725 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
What are the Possible Causes of the P0725 Code?
P0725 is a generic code, so it can have several triggers. Here are the most common:
- Faulty crankshaft or camshaft position sensor
- Faulty transmission speed sensor
- Circuit problems, such as damaged wires or poor connections
- Data network issues
- Faulty ECM
- Faulty TCM
What are the Common Symptoms of the P0725 Code?
You may notice the following symptoms if your vehicle has a logged P0725:
- Illuminated check engine light
- Erratic or defective tachometer
- Erratic shifting and slippage in the transmission
- Poor fuel mileage
- Poor performance
- Depending on the severity, other related DTCs may be stored
How to Diagnose the P0725 Code
To avoid issues in your vehicle’s transmission, resolve code P0725 immediately. However, because this code has many triggers, figuring out the exact cause of the problem can be difficult.
When attempting diagnosis, always refer to the repair manual specific to your vehicle. All vehicles are built differently, so their diagnostic processes may vary. For example, a P0725 on a Nissan may be diagnosed differently from a logged P0725 on a Volkswagen.
How to Fix the P0725 Code
Code P0725 may be set in vehicles of varying makes and models. However, there is no one-size-fits-all solution for this code. All vehicles are built differently and may require varying solutions.
Always refer to the factory repair information specific to your vehicle before working on repairs. However, if you’re still unsure of which fix would work best on your vehicle, you can opt to have it serviced by a technician.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic.