Guide To P0777 OBD Error Code Solutions

<<See All OBD Codes

Have you come across this P0777 error code? Do you know what causes this error to appear in your vehicle? This is a general type of error code which signifies that either the electronic pressure control solenoids or solenoid circuit is faulty. The hydraulic pressure will lock the torque converter as needed and will be controlled by the pressure control solenoid which provides shift actuation.

The hydraulic pressure in the transmission is controlled by the TCM which uses the solenoid to apply clutch packs in the transmission. It gives various gear ratios which is needed to drive the vehicle down the road. If the component is not performing well as desired, then the P0777 code will be set.

What causes this problem with the Pressure Control Solenoid B Stuck On?

• Pressure control solenoid is faulty.
• Fluid is polluted or muddy.
• Transmission filter is blocked/ muddy.
• Transmission pump faulty.
• Transmission body valve faulty.
• Hydraulic passage has limitation.
• Broken connectors.
• Defective wires.
• Defective powertrain control module.

1. Pressure Control Solenoid - Looking for the right replacement part? Get them from Parts Avatar at best prices online.
2. Transmission Valve Body - This component has to be damage free to avoid the P0777 error code. Fix them as soon as possible.
3. Powertrain Control Module - Replacing the broken power control module can help you to get rid of the P0777 error code.
4. Transmission Filter - Inspect this element for any blocks or damages. If you find them, clean them off the filter or replace them.
5. Body Control Module Component - Does the P0777 error code keeps appearing? There are chances for a defective body control module which needs fixation.

Willing to know some common symptoms of OBD Code P0777? Your wish is our demand. Have a look at them below:

Common Symptoms

Symptoms will start from nowhere to shift problems or a part of torque converter turns faulty. At times, when this code appears, transmission will enter limp mode. Other common indications are problem of shift, slipping, over burn, and reduced fuel mileage.

• Vehicle reaches limp mode.
• Slipping of transmission during shift.
• Transmission burn.
• Transmission clasps in gear.
• Low fuel economy.
• Indications of misfire.
• Check engine light is well lit.

We have listed out some ways which would help you to correct the occurrence of OBD Code P0777. They are mentioned here as follows:

• Repairing for leaks.
• Reworking the transmission if there is low fluid in transmission, following a fluid flush and finally replacement. Before continuing, install new torque converter.
• Replacing the burnt, or defective wires, connectors and components.
• Hydraulic pump replacement. The mechanic will partly remove the transmission to change the pump and partly disassemble it.
• Replacing or fixing the shorted circuits / connectors.
• Faulty pressure control solenoid needs replacement.
• Replacing the faulty PCM.

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of pressure control solenoid, transmission valve body, PCM, transmission filter and many more. Now all your problems would vanish within no time.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• Visually examine the transmission level and its condition.
• The fluid that has either burnt or abnormal odor indicates that the transmission is damaged.
• In such scenario, the mechanic will drop the transmission pan to see if there are any rubbles from the transmission.
• If there are no rubbles, the mechanic will fill the fluid to right level and check for leaks.
• If you have fixed the leak, fill the fluid in the transmission to its normal level. Start the car till it reaches the original operating temperature.
• You also have to check the wires, connectors for damages.
• Clear the code and inspect them to see if they return. Also, download the freeze frame data and stored codes. If you find the code, you can verify the pressure created with the help of hydraulic pressure diagram. Compare the result with the specification by manufacturer.
• Clear the codes again to see if they reappear. If they appear then use a DVOM to inspect the reference voltage and ground signals at the electronic pressure control solenoid which produces the diagnostic code.
• If both the ground circuit and reference voltage are open, check for continuity using a volt/ohmmeter.
• Manually operate the electronic pressure control solenoid to retest the system.
• Check the PCM if no other issue exists and if still the code appears.
• Finally clear the codes and test them to see if error re-appear.

Common Mistakes When Diagnosing the P0777 Code

When diagnosing the P0777 code, the common mistake made is not fixing the wires and electronic pressure solenoid, but changing the high-pressure pump which is not necessary which makes the error to reappear.