P0795 is a transmission-related diagnostic trouble code indicating that the Powertrain Control Module (PCM) has detected a malfunction in Pressure Control Solenoid C, which regulates hydraulic line pressure in the automatic transmission. This solenoid is typically the third in a set (A, B, C) that manages shift feel and torque converter clutch apply.
The solenoid itself has failed internally, either due to worn coils, stuck valves, or mechanical breakage. This is the most common cause and is often indicated by a specific solenoid fault rather than a general pressure fault.
Dirty fluid can clog solenoid passages and cause erratic operation, while low fluid levels result in insufficient hydraulic pressure to operate the solenoid properly.
Damaged, corroded, or loose wiring/connectors to the solenoid can cause open or short circuits, triggering a P0795 code. This includes wiring chafing from heat or movement.
The sensor that monitors line pressure and feeds back to the PCM may be providing incorrect data, causing the code to set even when the solenoid is functional.
Worn pump, stuck valves in the valve body, or other hydraulic system failures can cause abnormal pressures that trigger the code.
Rarely, the PCM may incorrectly interpret solenoid performance or have a processing fault. This should only be considered after all other causes are ruled out.
It is not recommended to drive far or aggressively with this code present. The transmission may slip, fail to shift properly, or engage limp mode, potentially leading to internal transmission damage. Have it diagnosed as soon as reasonably possible.
No. While some technicians may suggest replacing the PCM or transmission control module, this is rarely the actual cause. The PCM itself fails infrequently, and replacing it without confirming other causes will result in an unnecessary and expensive repair.
Not typically. Most P0795 failures are traced to the specific solenoid, wiring, or fluid issues rather than catastrophic transmission internal damage. Solenoid replacement is often possible without removing the transmission on many vehicles.
It may if the cause is contaminated or low fluid. A fluid change is often tried first as a diagnostic step, but if the solenoid has mechanically failed, fluid service alone will not resolve the code.