P0717 code — how to fix error fast

Using a scanner tool only to receive a problem code P0717 is one of the worst things that can happen to any driver. The letter “P” gives it away in terms of the P0717 code meaning associated with the transmission, but what does this code truly stand for?

In this guide, we’ll figure it out together as our team of automotive experts leads you through the main consequences of the code and ways of dealing with it. By the end of this article, you should know how to remove the code and take proper preventive measures to ensure it doesn’t appear again.

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What does the P0717 code mean?

The P0717 code is a DTC that indicates a problem with the input turbine speed sensor circuit in a vehicle’s automatic transmission. This sensor is responsible for monitoring the speed of the input shaft in the transmission, which is important for the proper shifting of gears. When this sensor is not functioning properly, it can lead to issues with the transmission, such as harsh shifting, slipping, and even transmission failure.

To put it simply – this code indicates an issue with the sensor that evaluates the efficiency of the transmission and its performance, and that’s not all there is to it. If things get worse regarding this code, your vehicle may even lock up in the “limp mode” and this is especially dangerous if you are driving on a highway at a higher speed.

What causes the P0717 code?

There are several potential causes of the P0717 code, including a faulty input turbine speed sensor, a damaged wiring harness, or a malfunctioning transmission control module (TCM). Below is a more detailed description of each potential cause, along with examples of symptoms that may be present with the code:

Malfunctioning input speed sensor

The input turbine speed sensor may be faulty due to wear and tear or damage. Symptoms of a faulty sensor include harsh shifting, slipping, or failure to shift. The sensor could suffer from damaged wiring or connectors, or a problem with the ECM.

Damaged wiring harness

The wiring harness that connects the input turbine speed sensor to the TCM may be damaged due to exposure to heat or wear and tear. Symptoms of a damaged wiring harness include intermittent issues with shifting or failure to shift.

Malfunctioning transmission control module

The TCM is responsible for controlling the transmission, including the input turbine speed sensor. If the TCM is malfunctioning, it can cause issues with shifting or failure to shift.

You should also check the level of your car’s transmission fluid just to be safe, as well as look closely into it to evaluate the form of the fluid in case there’s any sign of contamination that may lead to the code.

Which car models does the P0717 code affect the most?

The P0717 code can affect a variety of car models, but it’s most commonly found in vehicles with automatic transmissions. Some of the car models that are most commonly affected by the P0717 code include the following:

• Dodge RAM: The Ram is a popular workhorse vehicle that is often used for towing and heavy-duty hauling, which can put a strain on the transmission and its various components.
• Nissan Altima: The Altima is a mid-size sedan that is known for its smooth and efficient CVT (continuously variable transmission). However, this transmission has been known to experience issues with the input speed sensor circuit, which can trigger the P0717 error code.
• Ford Fusion: Some Ford Fusion models are most likely to face issues with this code due to the design of the automatic transmission which is prone to failure.

How to diagnose the P0717 code

Diagnosing a P0717 error code requires specialized diagnostic tools and expertise, as it can be caused by a variety of underlying issues. Even so, we’ve gone the extra mile for you to assemble a list of other diagnostic methods you can use to configure the code, and most of them can be done without a mechanic’s help:

Visual inspection

Once the code has been identified, a visual inspection of the input speed sensor and its wiring and connectors may reveal some signs of the code. They will check for any signs of damage, corrosion, or wear that could be causing a malfunction.

Testing the sensors with a multimeter

If no obvious issues are found during the visual inspection, you can perform resistance testing on the input speed sensor circuit using a multimeter. This will help to identify any electrical faults in the circuit that could be causing the P0717 error code.

Checking transmission fluid

In some cases, a low transmission fluid level or poor quality/contaminated fluid may be causing the P0717 error code. You can inspect the transmission fluid level and quality, and flush and replace the fluid if necessary.

How to fix the P0717 code

Once you get to the bottom of the issue by finding the reason why it appears in your car, you can use this information to find an appropriate solution. Having in mind the most common reasons behind the code, here are some of the simplest fixes you can apply:

Replace the input speed sensor

In many cases, the most effective way to fix a P0717 error code is to replace the input speed sensor itself. Replacing the input speed sensor usually involves removing the transmission pan and filter, locating the sensor, disconnecting it from its wiring harness, and replacing it with a new one.

Repair the wiring and harnesses

If the issue is related to damaged or corroded wiring or connectors in the input speed sensor circuit, the mechanic may need to repair or replace these components. This can involve identifying and repairing any breaks or faults in the circuit or replacing damaged connectors or wiring.

Flushing or replacing transmission fluid

In cases where a low transmission fluid level or poor quality/contaminated fluid may be causing the P0717 error code, it may be required to flush and replace the transmission fluid to ensure that it is at the correct level and free of contaminants.

Performing TCM software updates

In some cases, updating the vehicle’s software may be necessary to fix issues related to P0717 error codes. This can involve downloading and installing updates from the manufacturer, or using specialized diagnostic equipment to reprogram the vehicle’s TCM.

How to prevent the P0717 code

Preventing the P0717 code requires routine maintenance and proper care of the transmission system. Below is an overview of preventative measures, routine maintenance that may help prevent the code, and a discussion of how to properly maintain the affected system:

• Change the transmission fluid regularly
• Check the wiring harness regularly
• Drive the vehicle responsibly

Regularly changing the transmission fluid can help prevent issues with the transmission, including the P0717 code. It’s recommended to change the fluid every 30,000 to 60,000 miles, depending on the make and model of the vehicle. You should also check the wiring regularly for any signs of damage, and avoid harsh acceleration or sudden stops to keep your transmission and make it last a while longer.

Our take

As the time comes to sum things up, it’s evident that the code P0717 may cause some serious trouble in case it’s triggered by a serious malfunction within the transmission system. Because of that, it’s vital to react instantly and try to fix the issue at its core, and our guide was hopefully helpful enough to give you some basic knowledge on how to do it.