P0748 — Pressure Control Solenoid 'A' Stuck On
Drivable short-term, but fix now to avoid damage.
What P0748 means
This code means the pressure control solenoid appears stuck in the on position, so it bleeds off too much hydraulic pressure and the transmission runs with line pressure that's too low. The result is often slipping and weak shifts. Common fixes include servicing or topping off the transmission fluid, replacing the faulty solenoid, or repairing valve body and wiring issues.
Common symptoms
- Check engine light is on
- Transmission slipping, especially under load
- Soft, delayed, or mushy gear shifts
- Loss of power or hesitation when accelerating
- Transmission entering limp mode
Common causes
- Pressure control solenoid stuck on or shorted
- Low or worn-out transmission fluid
- Wiring short or connector corrosion
- Valve body wear allowing pressure loss
- Internal clutch wear from prolonged slipping
Typical repair cost
$250 – $950
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0748 code?
You can drive briefly, but you really shouldn't push it. Low line pressure causes slipping, and a slipping transmission overheats and wears quickly. Get it looked at as soon as possible to avoid a major repair.
How much does it cost to fix a P0748?
A fluid service might run around $250, while replacing the pressure control solenoid usually costs $400 to $950 with labor. If the slipping has already damaged internal clutches, the repair can be significantly higher.
Is P0748 serious?
Yes, it deserves prompt attention. A solenoid stuck on lowers transmission pressure and causes slipping, which is one of the faster ways to wear out a transmission. Addressing it early can save you from a rebuild.
Why does P0748 cause slipping?
When the solenoid is stuck on, it keeps relieving pressure that should be holding the clutches firmly engaged. With too little pressure, the clutches slip instead of gripping, leading to that lurching, RPM-flaring feel.