P0776 Code Symptoms and Causes | How to Fix Code P0776?

An automatic transmission is able to change gears using solenoids that manage fluid pressure between the hydraulic circuits in the transmission assembly. When the powertrain control module (PCM) detects that there is something wrong with these solenoids, the P0776 code might appear when you plug in a scan tool. This article explains the symptoms and causes of the P0776 code.

P0776 Code Definition

P0776 is a diagnostic trouble code (DTC) for “Pressure Control Solenoid B Performance.”

What does the P0776 code mean?

The P0776 code stands for “Pressure Control Solenoid B Perf/Off.” It is a generic, transmission-related trouble code that typically applies to vehicles that are equipped with an automatic transmission.

P0776 code

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

Most automatic transmissions have three solenoid groups: A, B, and C.

The PCM controls these solenoids to direct fluid at the appropriate pressure to various hydraulic circuits. These pressure changes cause the transmission to change gear ratios at the correct timing. The P0776 is triggered by the PCM when the pressure control solenoid “B” is not functioning properly or is stuck in the “off” position.

Causes of the P0776 Code

The P0776 code could be stored for lots of reasons. Some of the most common ones include:

  • Restricted hydraulic passages
  • Damaged or faulty pressure control solenoid
  • Blocked internal transmission fluid passages
  • Mechanical internal transmission errors
  • Defective transmission fluid pump
  • Low transmission fluid
  • Dirty or clogged transmission fluid filter 
  • Contaminated or dirty transmission fluid
  • Mechanical internal transmission failures
  • Damaged solenoid wiring
  • Valve body issue
  • Faulty PCM

Read More: PCM Working, Symptoms and Causes

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. Following are the most common symptoms of the P0776 code:

  1. Illuminated check engine light
  2. Transmission slippage
  3. Transmission overheating
  4. The vehicle enters limp mode
  5. Poor fuel efficiency
  6. Harsh shifting
  7. Transmission jerking 
  8. Engine stalls

Common P0776 diagnostic mistakes

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 to diagnose the P0776 Code?

  1. Use an OBD-II scanner to find out which codes have been stored by your vehicle’s PCM.
  2. Check the level and quality of the transmission fluid.
  3. If the transmission fluid doesn’t appear burned, then flushing the transmission could clear blocked internal passages.
  4. Inspect the transmission pan.
  5. Inspect the wiring and connectors should be inspected for signs of damage, corrosion, and possible short circuits.
  6. Inspect the pressure control solenoid.
  7. If your vehicle still shows the code, inspect the pressure regulator, transmission pump, and valve body torque convertor.
  8. Inspect the actual PCM as well.

How serious is the P0776 Code?

A P0776 code is considered a serious code and should be repaired as soon as possible as it can cause the transmission to slip or shift erratically, which can lead to further transmission damage.

FAQ Section

What is pressure control solenoid a performance or stuck off?

Diagnostic trouble code (DTC) P0746 stands for “Pressure Control Solenoid “A” Performance/Stuck Off.” This code sets when the transmission control module (TCM) detects an issue with a transmission pressure control solenoid.

What repairs can fix the P0776 Code?

  • Cleaning corrosion from connectors
  • Changing the fluid and filter
  • Repairing or replacing wiring
  • Transmission flush to clean passages
  • Repair or replace the defective transmission valve body
  • Repair or replace a faulty transmission pump
  • Replace faulty pressure control solenoid
  • Flashing or replacing PCM

What is the replacement cost of the pressure control solenoid?

The replacement cost of the pressure control solenoid varies according to the vehicle model, labor cost, and the type of brank. The average replacement of the pressure control solenoid is from $140 to $410. Depending on the make and model of your vehicle, expect to pay between $20 and $110 for a single transmission shift solenoid. A pack can cost $40 to $310.

Can I replace the transmission solenoid myself?

Replacing a transmission shift solenoid can be done by almost any auto repair shop or automobile dealership service center, or you can do-it-yourself “DIY.”

Can I drive with the P0776 code?

Yes, you can drive a vehicle with a P0776 code. However, this code is considered to be serious. As your vehicle triggers this code, you must drive your vehicle to the nearest workshop to fix it.

What are the causes of code P0776?

The trouble code P0776 refers to a problem with the pressure control solenoid “B.” It is usually caused by a faulty electronic pressure control solenoid, damaged wiring, low transmission fluid level, or blockages in the transmission fluid pathways.

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