P0776

Pressure Control Solenoid B Performance/Stuck Off

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

129

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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?+