P0715 OBD-II Trouble Code: Input/Turbine Speed Sensor Circuit Malfunction

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Cost of diagnosing the P0715 code

P0715 is a diagnostic trouble code (DTC) for "Input/Turbine Speed Sensor Circuit Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

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P0715 trouble code definition

A P0715 trouble code is related to the communication between a vehicle’s engine and transmission. When the input speed sensor does not receive a signal that is within the manufacturer’s parameters, a P0715 will illuminate as the transmission will not be able to read the engine RPMs to shift properly.

What the P0715 code means

P0715 is an OBD-II generic code for a signal error between the engine control module (ECM) and the automatic transmission control module (TCM). If the code is present, the input speed sensor does not detect the engine’s (turbine) revolution speed and receives the wrong signal, failing to shift gears in accordance to the manufacturer’s parameters.

What causes the P0715 code?

A P0715 usually has one main cause and other secondary issues that are less common. These include:

What are the symptoms of the P0715 code?

The most common symptoms of a P0715 will be hard or erratic shifting issues. The transmission may not shift automatically either.

How does a mechanic diagnose the P0715 code?

A visual inspection of the input speed sensor will be your mechanic’s first move to determine it’s condition and the condition of its wiring. If there are damaged wires, they will be replaced. Your mechanic can test the voltage and ground wiring to the sensor to see if there is a failure with the wiring, or the sensor itself. If the wiring checks out, your mechanic will replace the sensor, reset the ECM and test drive the vehicle. If this does not fix the problem, then there may be an issue with the automatic transmission itself.

Common mistakes when diagnosing the P0715 code

Some input speed sensor wiring can be damaged from transmission fluid leaks that are not fixed after replacing wiring and or sensors. If this is done, the sensor is liable to fail again soon.

How serious is the P0715 code?

P0715s can affect vehicle’s differently as some will cause no noticeable issues, while others will cause the transmission to simply not shift. An automatic transmission that won’t shift is not only inconvenient, but it’s dangerous as well.

What repairs can fix the P0715 code?

The most common repairs for a P0715 are as follows:

  • Replacing the input speed sensor
  • Repairing damaged wiring for the input speed sensor

Additional comments for consideration regarding the P0715 code

P0715 codes are not exclusive to traditional automatic transmissions as some continuously variable transmission (CVT) models can be affected too.

Need help with a P0715 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

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