P0778 on Ford
Pressure Control Solenoid B Electrical
P0778 on Ford vehicles indicates pressure control solenoid b electrical. Au7o has documented this code across 1 Ford model — most commonly on Freestyle. This is a transmission code. Pressure control solenoids regulate the hydraulic fluid pressure that applies the transmission's clutches for smooth, firm gear changes. P0778 specifically flags an electrical fault with Pressure Control Solenoid 'B' — the transmission control module sees that the solenoid's circuit is open, shorted, or drawing current outside the normal range. Symptoms can include harsh or slipping shifts, incorrect line pressure, or the transmission entering limp mode to protect itself. Typical repair costs on Ford range from $200 to $5,500, depending on the specific model and root cause.
Common Causes of P0778
- •Failed Pressure Control Solenoid B (electrical fault)
- •Damaged wiring or corroded connector to the solenoid
- •Low, dirty, or contaminated transmission fluid
- •Short to power or ground in the solenoid circuit
- •Internal valve body wear or debris
- •Clogged solenoid screen or fluid passage
- •Faulty transmission control module (less common)
P0778 on Ford by Model
Ford Freestyle(1 issue)
- CVT Transmission Failure and Poor Acceleration2005-2007
The Ford Freestyle shares the same problematic ZF CVT (Continuously Variable Transmission) as the Ford Five Hundred, and suffers from similar failure modes. The transmission develops poor acceleration, hesitation, stalling, and eventually complete failure, often around 80,000-120,000 miles. The CVT check engine light frequently illuminates as the transmission deteriorates. The manufacturer of the CVT no longer produces new units, making only rebuilt transmissions available at high cost. The Freestyle's heavier weight compared to the Five Hundred (due to its crossover body) puts even more stress on the CVT.
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View P0778 across all makes →Frequently Asked Questions
What does P0778 mean on Ford?▼
P0778 stands for "Pressure Control Solenoid B Electrical." This is a transmission code. Pressure control solenoids regulate the hydraulic fluid pressure that applies the transmission's clutches for smooth, firm gear changes. P0778 specifically flags an electrical fault with Pressure Control Solenoid 'B' — the transmission control module sees that the solenoid's circuit is open, shorted, or drawing current outside the normal range. Symptoms can include harsh or slipping shifts, incorrect line pressure, or the transmission entering limp mode to protect itself. On Ford specifically, this code is documented across 1 model.
What causes P0778 on Ford vehicles?▼
Common causes on Ford: Failed Pressure Control Solenoid B (electrical fault), Damaged wiring or corroded connector to the solenoid, Low, dirty, or contaminated transmission fluid, Short to power or ground in the solenoid circuit, Internal valve body wear or debris. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0778 on a Ford?▼
Repair costs on Ford range from $200 to $5,500, depending on the specific model and root cause.
Which Ford models have P0778 documented?▼
Au7o has documented P0778 on 1 Ford model: Freestyle.