P0776: How to Diagnose & Fix — Pressure Control Solenoid B Performance/Stuck Off
18 vehicles · 10 makes · $150-$8,000 repair
How to diagnose and fix P0776: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
GMC Terrain · 2010–2017
The 2010-2017 Terrain uses the GM 6T45 (2.4L) and 6T70 (V6) 6-speed automatic transmissions, both of which suffer from torque converter shudder, harsh shifts, and solenoid failures. The shudder occurs at light throttle between 30-50 mph when the torque converter clutch locks up. Solenoid pack wear causes P0756, P0751, and P0776 transmission fault codes. The transmission is sensitive to fluid condition — the 6T45/6T70 was originally filled with Dexron VI, and that early fluid degrades faster than newer formulations, so a full fluid exchange with current Dexron VI is the first step.
Common Symptoms
- Shudder at light throttle 30-50 mph
- Harsh 1-2 or 2-3 upshift
- Hesitation or lurch when pulling away from a stop
- Transmission fault codes P0756, P0751, P0776
- Check engine light
- Delayed engagement from Park to Drive when hot
How to Fix
Full fluid exchange with Dexron VI (ACDelco 10-9243 or equivalent). TCM calibration update. Solenoid pack replacement (GM 24272814) if codes present. Valve body replacement for internal failures. Fluid service every 40,000 miles recommended for stop-and-go use.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Dexron VI full-synthetic automatic transmission fluidOEMACDelco 10-9243 (GM 88865549)Cross-refValvoline DEXRON VI ATF 822405, Mobil 1 Synthetic ATF Dexron VI 112980, Castrol Transmax DEXRON-VI 03520C$8–$15
Dexron VI is required — do NOT substitute Dexron III or a universal/multi-vehicle ATF, as the friction
- Control solenoid valve assembly (valve body + solenoids + TEHCM) — 2.4L, 2012-2013OEM24041960$600–$960
THIS is the part that actually fixes P0751/P0756/P0776 on the 6T40/6T45. GM does not sell the individual shift/pressure-control solenoids for this transmission as a serviceable part — the solenoids are integrated into the TEHCM/valve bod…
- Control solenoid valve assembly (valve body + solenoids + TEHCM) — 2.4L, 2014-2017OEM24041961$598–$915
Same function as 24041960 but the correct number for the later 2.4L Terrain — this is the year split, so do not cross-order between them.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
Sources for this issue (2)
Cadillac STS · 2008–2011
The GM 6L50 6-speed automatic transmission in V6-equipped STS models is prone to overheating and developing harsh shift quality. The transmission fluid cooler is undersized for the vehicle weight, and the valve body solenoids degrade from heat cycling. Fluid darkens rapidly, and shift quality deteriorates with delayed or slipping 3-4 and 5-6 upshifts. The torque converter clutch also fails prematurely from heat damage.
Common Symptoms
- Harsh or delayed 3-4 upshift
- Transmission fluid dark or burnt smell by 50,000 miles
- Transmission temperature warning
- Torque converter shudder at 40-50 mph light throttle
- Slipping in higher gears under load
How to Fix
Perform a complete transmission fluid and filter change (not a flush) every 30,000 miles using Dexron VI. Install an auxiliary transmission cooler for vehicles used in hot climates or towing. If shifts are already harsh, a valve body rebuild or replacement with updated solenoids may be required. Torque converter replacement is needed if shudder is present.
Sources for this issue (2)
Mitsubishi Outlander · 2016–2024
Mitsubishi's bulletin says CVT-8 transmissions may shudder or surge, possibly caused by poor reaction of the hydraulic pressure circuit. With continued driving the CVT belt may slip repeatedly when accelerating and abrasion powder may enter the hydraulic circuit, turning on a warning light with P0776, P0730, P0741, P084A, P0969 or P2719; owners may describe it as engine flare, lack of acceleration or car shake. Applies to: 2022-2024 Outlander with the 2.5L engine and 2016-2020 Outlander with the 2.4L engine, with F1CJC/W1CJC (CVT-8) transmissions. It excludes every Outlander Plug-in Hybrid.
Common Symptoms
- Transmission shudder or surge
- Engine flare or poor acceleration
- Transmission warning light
How to Fix
On a customer complaint, a Mitsubishi dealer follows TSB-20-23-001REV4: confirms recall SR-16-006 is complete where it applies (2016 models), saves the DTC list and freeze-frame data, opens a Techline case and, for P0776 or P084A, inspects the CVT belt and pulleys with a borescope. Depending on diagnosis and Techline instruction, the valve body and/or the CVT-8 transaxle is repaired or replaced and the CVT ECU coding in TSB-15-23-001 is performed; a replacement transmission is ordered only with Techline or DPSM approval. The bulletin lists powertrain coverage (10 years/100,000 miles for the original owner, 5 years/60,000 miles for later owners), counted from the original in-service date. Normal warranty rules apply; this is not a recall or a promise of free repair.
Sources for this issue (2)
Ford Explorer · 2011–2019
Hyundai Sonata · 2011–2019
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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?
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.
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?
Repair costs for P0776 range from $150 to $8,000, depending on the vehicle and root cause.
Which vehicles are affected by P0776?
Au7o has documented P0776 across 18 vehicle models from 10 manufacturers: Buick, Cadillac, Chevrolet, Ford, GMC, Hyundai, Infiniti, Mitsubishi, Nissan, Opel.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.