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P0779 is a diagnostic trouble code (DTC) for "Pressure Control Solenoid B Intermittent". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
P0779 OBD-II Trouble Code: Pressure Control Solenoid B Intermittent
The P0779 code is a generic powertrain code related to the transmission, including sensor failures and pressure faults. In this case, the engine control module (ECM) has detected a fault with Pressure Control Solenoid B, receiving intermittent voltage signals.
Codes related to the P0779 include:
The automatic transmission is controlled by the ECM with varying degrees of hydraulic pressure, which provides shift actuation and torque converter lock up. Utilizing electronic pressure control solenoids, which are controlled by the ECM, the hydraulic pressure is regulated.
The parameters for which a P0779 code can be set varies by each automaker, so check your service manual for specifics for your vehicle’s make and model. However, typically the ECM utilizes calculations from several sensors, including the pressure control sensor, to determine how much pump pressure is needed for operation. When the transmission fluid pressure doesn’t match the amount the ECM detects, a P0779 code can be stored.
Several problems may cause a P0779 code including:
Symptoms of a P0779 code may include:
A mechanic may use several methods to diagnose a P0779 trouble code, including:
At times, a high pressure pump may be replaced in oversight of a faulty electronic pressure control solenoid or damaged or malfunctioning wiring. It is recommended to test all system circuitry and repair any damage within before replacing the high pressure pump.
Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0779 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.
Several repairs can fix a P0779 trouble code and include:
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