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.
What causes the P0776 code?
Common causes include a faulty electronic pressure control solenoid, hydraulic blockages inside the internal transmission fluid passages, mechanical internal transmission failures, low transmission fluid, dirty or contaminated transmission fluid, a faulty PCM or transmission control module.
What are the symptoms of the P0776 code?
Vehicle enters limp mode
Transmission slips when shifting
Transmission catches in gear
Decreased fuel economy
Common mistakes when diagnosing the P0776 code:
Technicians report that electronic pressure control solenoid and wiring malfunctions are often overlooked and high pressure pumps are frequently replaced in error.
What repairs can fix the P0776 code?
Repair/replace faulty electrical components
Replace/fill the transmission fluid
Replace the clutch
Replace the PCM