P0776 on Hyundai: How to Diagnose & Fix
Pressure Control Solenoid B Performance/Stuck Off
1 Hyundai model · 1 documented issue · $600-$4,500 repair
P0776 on Hyundai by model: symptoms, diagnosis and fix
The A6-series six-speed automatic fitted to the YF and LF Sonata wears the aluminium bores that house the solenoid pressure-reducing valves. The worn bores leak line pressure internally, so clutch apply pressure falls and the transmission either flares (RPM jumping between gears as a clutch slips) or bangs into gear once the pressure command finally builds. Reports of the wear appearing by 40,000-60,000 miles are common. Symptoms are frequently misdiagnosed as a bad solenoid pack and the solenoids replaced without addressing the bores, which returns the fault within months. This is distinct from the wet dual-clutch (DCT) shudder complaint on the turbo and hybrid variants - the A6MF is a conventional torque-converter automatic.
Common Symptoms
- Engine RPM flares between upshifts
- Harsh or banging 1-2 and 2-3 shifts
- Delayed engagement into drive or reverse
- Slipping under light throttle
- Intermittent stuck in one gear / limp mode
- Check engine light with transmission pressure codes
How to Fix
The durable repair is a valve body rebuild with an oversized valve kit (Sonnax-style) to restore the worn bores, or a replacement valve body - roughly $600-1,400 installed, versus $2,500-4,500 for a full transmission replacement. Start by scanning for pressure-control codes and checking fluid level and condition on a warm engine; some early-stage cases improve with a proper SP-IV fluid service and a TCU relearn, but that is a delay not a cure. Have the shop specifically confirm bore wear before agreeing to a solenoid-only repair. No recall covers this; some cars were repaired under the 10-year/100,000-mile powertrain warranty for original owners.
Sources for this issue (3)
P0776 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0776 mean on a Hyundai?
P0776 stands for "Pressure Control Solenoid B Performance/Stuck Off." This code means the transmission's Pressure Control Solenoid B is not performing correctly and is behaving as if stuck in the 'off' position. Pressure control solenoids regulate the hydraulic fluid pressure used to apply clutches and bands and to control shift quality, so when one underperforms the transmission may shift harshly, slip, flare between gears, or feel inconsistent. The transmission control module sets this code when the fluid pressure or response it measures doesn't match what it commanded from that solenoid. It generally indicates a hydraulic performance issue with the solenoid or its fluid circuit rather than just a wiring fault. On Hyundai it is documented across 1 model: Sonata.
What are the most common causes of P0776?
The most common causes of P0776 are: Stuck or failed pressure control solenoid B, Low, dirty, or degraded transmission fluid, Clogged solenoid screen or valve body passages, Sticking or worn valve body components, Wiring or connector problem at the solenoid, Internal transmission wear or pressure loss, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P0776 on a Hyundai?
Published repair estimates on Hyundai range from $600 to $4,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0776 on a different make?
View P0776 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.