P0764 — Shift Solenoid C Malfunction
Drivable short-term, but fix now to avoid damage.
What P0764 means
This code means the transmission's computer detected a problem with shift solenoid C, an electronic valve that controls fluid flow to change gears. It usually points to a failed solenoid, an electrical fault in the wiring, or low or dirty transmission fluid. Repairs often involve testing the solenoid, fixing wiring, or replacing the solenoid, and many cases are fixable without rebuilding the transmission.
Common symptoms
- Check engine light is on
- Transmission slips or shifts harshly
- Car gets stuck in one gear (limp mode)
- Delayed or erratic gear changes
- Reduced fuel economy
Common causes
- Failed or worn shift solenoid C
- Damaged wiring or poor electrical connections
- Low or dirty transmission fluid
- Clogged transmission fluid passages or filter
- Faulty transmission control module
Typical repair cost
$150 – $600
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0764 code?
For short trips, usually yes, but you shouldn't rely on it. If the car slips or drops into limp mode, driving becomes unsafe and can add wear, so get it checked as soon as you can.
How much does it cost to fix a P0764 code?
Most repairs run between $150 and $600. A simple wiring fix or fluid service is on the low end, while replacing the shift solenoid sits higher depending on your vehicle and labor.
Is a P0764 code serious?
It can be. A transmission that won't shift correctly affects safety and may worsen if ignored, so treat it as a high-priority repair rather than something to put off.
What is shift solenoid C?
It's an electronic valve inside the transmission that directs fluid pressure to engage certain gears. When it fails, the transmission can't shift smoothly, which triggers the P0764 code.