P0763 Code: Shift Solenoid C Electrical

Automatic transmissions have multiple shift solenoids, often labeled A, B, and C. The shift solenoid circuit helps the powertrain control module (PCM) monitor them. This lets the PCM monitor the movement of fluids between hydraulic circuits and alter the transmission gear ratio at the right time. P0763 is a trouble code related to a fault in shift solenoid C.

What Does the P0763 Code Mean?

Diagnostic trouble code P0763 stands for “Shift Solenoid C Electrical.” It’s set once the PCM detects an electrical fault within the shift solenoid C shift circuit.

Electronically controlled automatic transmissions use shift solenoids. These solenoids control pressure force which in turn controls the position of the shift valve.

To change gears, the automatic transmission uses bands and clutches, which are activated by having fluid pressure in the right place at the right time. Transmission solenoids are in charge of opening and closing valves in the valve body to allow transmission fluid to flow to the clutches and bands. This helps the transmission shift smoothly as the engine speeds up.

The PCM or transmission control module (TCM) controls shifting by supplying power or ground to the solenoids at a specific time. Once the PCM detects that there’s a problem within the shift solenoid C circuit, it’ll trigger the P0763 code.

Note: The definition of code P0763 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0763 Code?

• Low transmission fluid level
• Failed transmission shift solenoid
• Wiring problems
• Bad TCM or software in need of an update

What are the Common Symptoms of the P0763 Code?

• Illuminated check engine light
• Poor fuel economy
• Improper transmission shifting

How to Diagnose the P0763 Code

A P0763 code can be logged on any vehicle with an on-board diagnostics system. Although many vehicles can store the error code, the specifics of diagnosing it can vary depending on the make and model of the affected unit.

If you don’t know how to run diagnostic tests on your vehicle, take it to an auto repair shop for a proper diagnosis. However, if you’re a seasoned DIYer with in-depth automotive knowledge, you can go ahead and handle the problem on your own.

The video below will give you an idea of what the diagnostic process might involve:

How to Fix the P0763 Code

Resolving a P0763 code can be tricky, especially if you don’t have the right tools and know-how for the job. In that case, it’s best to let professionals address it because you’ll risk making the problem worse if you do it yourself.

But if you know your way around resolving trouble codes, then you know that there’s no way to fix all DTCs for all makes and models. So if you want to clear this trouble code on your own, make sure you have the right repair information. Consult guides like those from Chilton or an ALLDATA subscription for vehicle-specific repair information.