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If your vehicle’s automatic transmission begins to develop shifting issues, you must conduct a thorough investigation to determine the cause. With the help of an OBD-II scanner and a repair manual, you can find the source of your transmission problems much faster. There are several diagnostic trouble codes related to the transmission. One of them is code P0780.

What Does the P0780 Code Mean?

P0780 stands for “Shift Malfunction.” The code may register on your scan tool if your powertrain control module (PCM) detects a problem with your automatic transmission system.

Code P0780 is only applicable for vehicles with automatic transmissions. It’s a generic diagnostic trouble code that usually applies to OBD-II-equipped vehicles from Ford, Honda, Mazda, Volkswagen, and other manufacturers.

There are engine and transmission sensors in your vehicle that send information to your transmission controller in order to achieve smooth and efficient shifting. The transmission controller uses input and output speed sensors to determine if the hydraulic pressure in the transmission matches the appropriate RPM and engine load. Any mechanical or electronic malfunction during this process may trigger a P0780 code.

female driver shifting gear
The P0780 code can register on your scan tool if your PCM detects a problem with your automatic transmission system.

Note:  The definition of P0780: Shift Malfunction may vary depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact definition.

What are the Possible Causes of P0780?

A P0780 code may be triggered due to the following causes:

What are the Common Symptoms of the P0780 Code?

A malfunctioning transmission shift may exhibit the following symptoms:

automatic transmission input speed sensor
A malfunctioning input or output speed sensor is one of the possible causes of code P0780.

How to Diagnose the P0780 Code

A P0780 code can be difficult to diagnose because some of its causes and symptoms may overlap with other diagnostic trouble codes.

How to Fix the P0780 Code

Not all vehicles are the same. Some makes and models have specific instructions for fixing the problems that trigger a  P0780. If you don’t follow the procedures in your vehicle’s repair manual, you can end up damaging your ride’s internal components. Before attempting any repairs, you first need to identify the underlying causes that have triggered the P0780 code.

If you decide to fix the code yourself, you’ll need to conduct an accurate diagnosis of your vehicle to figure out what repairs are needed. We highly recommend using online auto repair resources to educate yourself on specific OBD-II codes. ALLDATA has single-vehicle subscriptions that include detailed factory repair information.

You can also bring your vehicle to the nearest repair shop and have it checked by a trained professional. They can give you a complete breakdown of your vehicle’s issues and perform the necessary repairs, so that you don’t have to do it yourself. This is an excellent option if you don’t mind paying for labor.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic.

File Under : OBD-II Trouble Codes
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