P2764: How to Diagnose & Fix — Torque Converter Clutch Pressure Control Solenoid Control Circuit Low
2 vehicles · 1 makes · $200-$8,500 repair
How to diagnose and fix P2764: 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.
Subaru Crosstrek · 2013–2021
The Lineartronic CVT (TR690) used in Crosstreks develops chain stretch over time, typically between 80,000-130,000 miles. The stretched chain causes slippage, resulting in judder during light acceleration, particularly between 20-45 mph. The issue worsens in cold weather and uphill conditions. Subaru addressed earlier models under warranty extension WTY-72 (10 years/100,000 miles) and released multiple software calibration updates. In severe cases, the CVT requires complete replacement.
Common Symptoms
- Juddering or shaking during light acceleration at 20-45 mph
- Slipping sensation when climbing hills
- Delayed response when pressing accelerator
- Whining noise from transmission that increases with speed
- Check Engine Light with CVT-related codes (P0700, P2764)
How to Fix
Start with CVT fluid drain and refill using Subaru CVT Fluid Lineartronic II (SOA427V1700). Have dealer apply latest transmission control module software update. If judder persists, valve body replacement may resolve the issue. For severe chain stretch, full CVT replacement is needed (Subaru reman unit available). Verify if covered under Subaru's CVT warranty extension program WTY-72.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (4)
Subaru Ascent · 2019–2024
The Ascent's TR730 high-torque CVT develops valve body failures that cause erratic shifting, harsh engagement, and transmission warning lights. The valve body controls hydraulic pressure to the CVT pulleys and chain, and when solenoids or passages within it fail, the transmission cannot maintain proper ratio control. This issue is distinct from the CVT hesitation TSB and represents a hardware failure rather than a calibration issue.
Common Symptoms
- Transmission warning light illuminated
- Harsh thud when shifting from Park to Drive
- CVT slipping or flaring RPMs under load
- Shuddering at highway speeds
- Vehicle going into limp mode (limited to low speeds)
- Burning fluid smell
How to Fix
Diagnose with dealer scan tool to confirm valve body solenoid fault codes. Valve body replacement resolves the issue in most cases — this is a less expensive repair than full CVT replacement. If the CVT has been operated with a failed valve body for an extended period, internal damage may necessitate full CVT replacement. Covered under Subaru's 10-year/100,000-mile CVT warranty.
Sources for this issue (4)
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P2764 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 P2764 mean?
P2764 stands for "Torque Converter Clutch Pressure Control Solenoid Control Circuit Low." This code means the powertrain or transmission control module detected a low-voltage condition in the control circuit for the torque converter clutch (TCC) pressure control solenoid. This solenoid regulates the hydraulic pressure that locks and unlocks the torque converter clutch for fuel efficiency. A low circuit fault can prevent proper clutch engagement, causing harsh or erratic shifting, slipping, stalling, or transmission overheating. The cause is most often electrical but can involve the solenoid or fluid condition.
What are the most common causes of P2764?
The most common causes of P2764 are: Faulty TCC pressure control solenoid, Damaged or corroded wiring/connectors in the circuit, Short to ground in the control circuit, Low or contaminated transmission fluid, Valve body issues, Poor ground or power supply, Faulty PCM/TCM. The specific cause varies by vehicle.
How much does it cost to fix P2764?
Repair costs for P2764 range from $200 to $8,500, depending on the vehicle and root cause.
Which vehicles are affected by P2764?
Au7o has documented P2764 across 2 vehicle models from 1 manufacturers: Subaru.
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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.