P0776
Pressure Control Solenoid B Performance/Stuck Off
Transmission
Generic OBD-II
Medium
What it means
P0776 means pressure control solenoid B isn't regulating transmission line pressure properly — it's underperforming or stuck off. Correct hydraulic pressure holds the clutches firmly; when it's too low, the transmission slips and shifts harshly, hurting fuel economy and, over time, the clutches. It won't cause a no-start, but the transmission needs attention before the slipping does damage.
Medium
Can I keep driving? Low or unstable line pressure makes the transmission slip and shift harshly, which wears the clutches — drive gently and get it fixed soon.
Common symptoms
What you'll notice
- Erratic shifting or slipping gears
- Harsh or delayed shifts
- Possible limp mode
- Reduced fuel economy
- Check-engine light on
Common causes
Most likely first
- Faulty pressure control solenoid BLikely
- Low or contaminated transmission fluidCommon
- Wiring or connector fault in the solenoid B circuitCommon
- Worn or sticking valve bodyLess often
- Transmission control module (TCM) faultLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to see the conditions when the fault set.
- Check transmission fluid level and condition; low fluid alone can drop line pressure.
- Inspect the solenoid B wiring and connector for damage or corrosion.
- Test the pressure control solenoid and, where possible, measure line pressure.
- Inspect the valve body; replace the solenoid if it fails testing. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0776?+
Drive gently and briefly. Wrong line pressure lets the clutches slip, which generates heat and accelerates wear. Prolonged slipping can damage the transmission, so repair it soon.
Can I just clear P0776?+
It comes back once the module sees the pressure fault again. The solenoid, fluid, or valve-body issue behind it has to be corrected.
Related codes
Often seen with P0776
Read & clear P0776 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX