P0795
Pressure Control Solenoid 'C' Malfunction
Get Your FREE AI Diagnostic Report
Enter your vehicle for a personalized diagnosis for code P0795
The P0795 code indicates a malfunction in pressure control solenoid C, which is responsible for precisely regulating hydraulic pressure in a specific circuit within the automatic transmission. Pressure control solenoids are critical for smooth, properly timed clutch engagement — they determine how much force is applied to clutch packs and bands during shifts.
When pressure control solenoid C malfunctions, the most common symptoms are harsh shifts and transmission slipping. These two symptoms represent the two extremes of the problem: too much pressure causes harsh engagement, while too little pressure causes the clutch to slip. Both conditions accelerate internal transmission wear and can lead to overheating, making this a code that should be addressed within a week of detection.
Diagnosis starts with a transmission fluid check — pressure control solenoids rely on clean, properly leveled fluid to function. If the fluid is overdue for service, start there. If the fluid is in good condition, the solenoid circuit wiring and the solenoid itself need to be tested. Pressure control solenoids are located inside the transmission on the valve body, and replacement typically requires removing the transmission pan. Due to the precision required in working with pressure regulation components, professional diagnosis and repair is recommended.
Severity
Symptoms
- •Harsh or jarring shifts
- •Transmission slipping, especially under heavy acceleration
- •Check Engine Light illuminated
- •Delayed engagement when shifting into Drive
- •Transmission overheating
Likely Causes
The solenoid that modulates hydraulic pressure for a specific clutch circuit has failed electrically or is mechanically stuck, resulting in incorrect pressure.
Insufficient or degraded ATF directly impacts the pressure control solenoid's ability to regulate hydraulic pressure accurately.
Corroded, shorted, or open wiring in the pressure control solenoid C circuit prevents proper TCM control of the solenoid.
Worn pressure regulator valves or clogged passages in the valve body prevent correct pressure modulation regardless of solenoid operation.
A failing Transmission Control Module may send incorrect pressure modulation commands to the solenoid.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Replace pressure control solenoid C
- Change transmission fluid and filter
- Repair or replace wiring and connectors in the solenoid circuit
- Rebuild or replace the valve body