Your vehicle is equipped with many sensors to monitor the different components of your engine and transmission. Along with your vehicle’s primary computer (powertrain control module or PCM), they work together to help various parts of your vehicle to operate correctly. One of these sensors is called an input speed sensor or turbine speed sensor.
What happens when your vehicle’s PCM detects a potential fault with this sensor? In this article, you will learn more about code P0715, a diagnostic trouble code (DTC) related to your input turbine speed sensor.
What Does the P0715 Code Mean?
Diagnostic Trouble Code (DTC) P0715 stands for Input/Turbine Speed Sensor “A” Circuit. To put it simply, this code is triggered when your vehicle’s PCM detects an irregularity in the signal sent by the input speed sensor in the transmission.
Error code P0715 is a generic trouble code, so it is supported in various makes and models. However, keep in mind that the repair and diagnostic procedures for each may vary depending on the specific vehicle you own.
To understand the code more, we have to discuss the basics of an input speed sensor.
Note: The definition of code P0715 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
Users have reported p0715 for the following makes: Mercedes Benz (especially on a Mercedes Benz ML320), Ford, Nissan, Mazda, and Mitsubishi.
More About Input Speed Sensors
An input speed sensor reads a reluctor ring. Located on or inside your vehicle’s transmission, the sensor is tasked to monitor your vehicle’s transmission input speed. This sensor can measure how many RPM (revolutions per minute) your input shaft is turning. Once the PCM detects an irregularity in RPM input, it will trigger the illumination of the Check Engine Light.
A vehicle may go into “fail-safe” mode as a result of this trouble code. This is a condition where the vehicle’s power and speed are suppressed to avoid further damaging other components.
What are the Possible Causes of the P2196 Code?
There can be several triggers of this code. Here are some of them:
- Faulty Input/Turbine Speed Sensor
- Faulty Output Speed Sensor
- Failing Torque Converter
- Damaged sensor wiring
- Damaged or broken reluctor ring/shaft
- An internal transmission issue
What are the Common Symptoms of the P2196 Code?
Aside from the check engine light, here are other common symptoms you should watch for:
- Vehicle in “fail-safe condition”
- Abnormal transmission operation
- Decreased fuel economy
How to Diagnose the P0715 Code
It may be difficult to diagnose and pinpoint the exact cause of this code. If you’re not confident that you can do this on your own, you can always ask your trusted mechanic to do the diagnostic procedures for you.
However, if you’re equipped with the DIY automotive skills needed, here is a video you can watch to help you understand the code more:
How to Fix the P0715 Code
P0715 is a generic code and it is supported in various makes and models. However, there is no single fix for the code. This may vary depending on your vehicle’s make and model. For example, repair procedures for a P0175 in Chevy may vary from a P0175 in Ford.
If you’re not that familiar with auto repair, it is best to leave the job to trusted professionals.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic.