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P0776 OBD-II Trouble Code: Pressure Control Solenoid B Performance

check engine light

P0776 code definition

Code P0776 is an indication that your vehicle’s PCM has found an abnormality related to the electronic pressure control solenoid circuit or simply the solenoid itself.

What the P0776 code means

The computer-controlled automatic transmission relies on varying levels of hydraulic pressure to supply torque converter and shift actuation lockup. Pressure is controlled by using at least one electronic pressure control solenoid. This is overseen by the PCM.

Although it’s a bit different across all makes and models, almost every application relies on calculations based on engine load, engine speed, throttle position and vehicle speed to measure the appropriate degree of pump pressure necessary for efficient operation. Should the amount of fluid deemed necessary not coincide with the actual amount used, code P0776 is stored and the Check Engine Light should come on. It’s worth noting, though, that in some applications, the light won’t be activated until several failure cycles.

What causes the P0776 code?

This code could be stored for lots of reasons. Some of the more common ones include:

  • An electronic pressure control solenoid that isn’t working
  • Mechanical internal transmission errors
  • The internal transmission fluid passages are suffering from hydraulic blockages
  • Low transmission fluid
  • Contaminated transmission fluid
  • Mechanical internal transmission failures
  • Faulty PCM

What are the symptoms of the P0776 code?

This code could make for a wide range of symptoms. In some situations, drivers don’t actually detect anything noticeably wrong with their vehicle. Other times, their shifting function may become completely disabled. Your torque converter clutch could fail to engage or disengage. Sometimes, when this code is stored, the PCM responds by putting the vehicle into “limp-in” mode.

Other common symptoms include:

How does a mechanic diagnose the P0776 code?

The mechanic will use an OBD-II scanner to find out which codes have been stored by your vehicle’s PCM. Then their diagnosis process will move to checking on the level and quality of the transmission fluid. They may even need to inspect the transmission pan. Next, they’ll examine the connectors, wiring and other electrical components. In rare cases, they may need to take a look at the actual PCM as well.

Common mistakes when diagnosing the P0776 code

A lot of times, mechanics focus on a vehicle’s high pressure pump and eventually even replace it when the actual solution lies with wiring malfunctions or the electronic pressure control solenoid.

How serious is the P0776 code?

As you can probably tell from the list of symptoms above, this is definitely a code you want to have fixed right away. Driving your vehicle won’t be easy as long as the problems related to this code are around. Furthermore, even if you are only experiencing mild symptoms at the moment, those could get worse in the near future.

What repairs can fix the P0776 code?

Your mechanic will most likely:

Additional comments for consideration regarding the P0776 code

This code can represent multiple issues and is associated with plenty of other problem codes too. Therefore, it would be wise to adjust each of them in the order they were stored. That’s the best way to ensure you don’t miss any major problems. After each repair, be sure to clear the system, too, so you can see if any others still exist before moving on.

Need help with a P0776 code?

When your vehicle is suffering from P0776 problems or any other type of issue, YourMechanic is here to help. For a quick quote and to schedule an appointment, all you need to do is fill out this online form. You can also give us a call at 1-800-701-6230 to speak with a service advisor. On the day of your appointment, one of our certified mobile mechanics will meet you at your place of business or home and handle the entire repair on the spot.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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