P0963 on Subaru
Pressure Control Solenoid "A" Control Circuit High
P0963 on Subaru vehicles indicates pressure control solenoid "a" control circuit high. Au7o has documented this code across 1 Subaru model — most commonly on Ascent. This code sets when the transmission control module detects that the control circuit voltage for pressure control (line pressure) solenoid A is too high, indicating an open circuit or a short to voltage. This solenoid regulates transmission line pressure used to apply clutches and control shifts, so an electrical fault disrupts pressure control. Symptoms include harsh or slipping shifts, incorrect line pressure, or the transmission going into failsafe/limp mode. The cause is generally in the wiring or the solenoid itself. Typical repair costs on Subaru range from $1,500 to $8,500, depending on the specific model and root cause.
Common Causes of P0963
- •Open in the solenoid A control circuit
- •Short to voltage in the control circuit
- •Failed pressure control solenoid A (open coil)
- •Damaged or corroded wiring or connector
- •Internal transmission harness fault
- •Low or contaminated transmission fluid
- •Faulty transmission control module (less common)
P0963 on Subaru by Model
Subaru Ascent(1 issue)
- CVT Valve Body Failure and Transmission Warning2019-2024
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.
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What does P0963 mean on Subaru?▼
P0963 stands for "Pressure Control Solenoid "A" Control Circuit High." This code sets when the transmission control module detects that the control circuit voltage for pressure control (line pressure) solenoid A is too high, indicating an open circuit or a short to voltage. This solenoid regulates transmission line pressure used to apply clutches and control shifts, so an electrical fault disrupts pressure control. Symptoms include harsh or slipping shifts, incorrect line pressure, or the transmission going into failsafe/limp mode. The cause is generally in the wiring or the solenoid itself. On Subaru specifically, this code is documented across 1 model.
What causes P0963 on Subaru vehicles?▼
Common causes on Subaru: Open in the solenoid A control circuit, Short to voltage in the control circuit, Failed pressure control solenoid A (open coil), Damaged or corroded wiring or connector, Internal transmission harness fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0963 on a Subaru?▼
Repair costs on Subaru range from $1,500 to $8,500, depending on the specific model and root cause.
Which Subaru models have P0963 documented?▼
Au7o has documented P0963 on 1 Subaru model: Ascent.